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The AstronomersSun
Videos with tag Sun
Results 1-25 of 88
 
00:18
00:18
00:18

NASA SDO - Plasma Indirection

As if it could not make up its mind . . . darker, cooler plasma slid and shifted back and forth above the Sun's surface seen here for 30 hours (Feb. 7-8, 2012) in extreme ultraviolet light. An active region rotating into view provides a bright backdrop to the gyrating streams of plasma. The particles are being pulled this way and that by competing magnetic forces. They are tracking along strands of magnetic field lines. This kind of detailed solar observation with high-resolution frames and a four-minute cadence was not possible until SDO, which launched two years ago on Feb. 11, 2010. So it's our 2nd Anniversary! Credit: NASA SDO

Channels: Solar astronomy 

Added: 2803 days ago by deek

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59:00
59:00
59:00

Space Odyssey: Voyage To The Planets 1 - BBC

Space Odyssey: Voyage To The Planets This two-part science fiction docu-drama examines the possibilities of a dangerous, manned space mission to explore the inner and outer planets of the Solar system. Five astronauts pilot the nuclear thermal rocket powered Pegasus spacecraft on a tour of the solar system. Their mission is a collaboration of the NASA, CSA, ESA and РКА space agencies and takes the crew to Venus, Mars, a close flyby of the Sun, Jupiter's moon Io and Europa, Saturn, Pluto, and the fictional Comet Yano-Moore. Most of the planetary destinations the crew reaches are followed by a manned landing there. Prior to the mission large tanks of hydrogen were deposited in stable orbits around the planets to allow the crew to refuel to have sufficient delta-v for the multi-year mission. The crew encounter many hardships and disappointments along the way. A Venus EVA that almost ends in disaster when the lander Orpheus encounters launch delays, the near-loss of the shield during the aerobrake in Jupiter's upper atmosphere (according to the first part of the miniseries) and the loss of samples from Jupiter's moon Io all test the crew's resolve. The most devastating blow comes when the ship's medical officer dies of solar radiation-induced lymphoma in Saturn orbit, forcing the crew to decide whether to continue the mission to Pluto, or abort and return to Earth. In the original British release, the crew decides to press on to Pluto, making history.

Channels: Planetary science 

Added: 2803 days ago by deek

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01:25
01:25
01:25

Planets and stars size in scale

Planets and stars size in scale, Uranus isn't shown but it's barely bigger than Neptune. It shows: Mercury Mars Venus Earth Neptune Saturn Jupiter Sun Sirius Pollux Arcturus Rigel Betelgeuse Antares MY Cephei W Cephei

Channels: Planetary science 

Added: 3685 days ago by hostonnet

Views: 3267 | Comments: 1

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08:01
08:01
08:01

NASA I - A Stroll Through the Solar System

Thanks to modern technology, today's youngsters grow up knowing more about our sun, planets, and solar system than all the famous philosopher/scientists in history -- Archimedes, Aristotle, Democritus, Copernicus, Galileo, Sir Isaac Newton. NASA allows us to take a close look at some of our most fascinating neighbors, from the sun to the nine known planets, and beyond to star clusters, nebulae, and galaxies. ... nasa sun planets venus mercury earth mars saturn jupiter star galaxy nebula ...

Channels: The Astronomers 

Added: 3691 days ago by adminn

Views: 2471 | Comments: 0

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08:49
08:49
08:49

RIR W Thornhill The Electric Universe 1/12

Author and researcher Wallace Thorhill joins us to discuss his work and book "The Electric Universe". He has been working closely with David Talbot over at thunderbolts.info and he's one of the voices in the "Thunderbolts of the Gods" DVD. Previously we've had Donald Scott and Rens van der Sluijs with us on the program, also contributors to thunderbolts.info, now Wallace joins us for an excellent two hour program as we explore the exciting theory of the electric universe. Topics Discussed: Immanuel Velikovsky, The Saturn Myth, Ancient Solar system, Gravity, Electricity, Journal of Classical Physics, Einstein, the Electric Universe Theory, Quasars, Black Holes, The Standard Model of the Sun, Solar Activity, Anode, Glow Discharge, Photosphere, Magnetism, Twisted Pairs, DNA shape of a Galaxy, Dark Currents, Fractal, The Nature of Gravity, Infinite Speed, Nerve Signaling Speed, Tom Van Flandern, The Origins of the Universe, Longitudinal System, Tesla, Free Energy and more. Don't miss hour two coming up with Wallace Thornhill for Red Ice Members, a very interesting continuation as we talk about Deep Impact, Temple One, Comets, Gravity, Discharge, Lightning, Sprites, Earthquakes and the relationship between the Earth, the Sun, the Galaxy and the Universe. We also go into the very fascinating area of Proto-Saturn, Saturn as a Brown Dwarf, this is our origins, we talk about what Wall calls "the Purple Dawn of Creation" and where the mythology and stories comes from in terms of our ancient past with two suns. Our solar system used to be a Binary Star system. So what happened to Saturn, we can still see effects of that today with the rings of Saturn and the hexagonal glow at its poles? We talk about Venus, Mars, the Sun, The Moon and comet's. We also get Wall's take on the "Norway Spiral". We talk about Plasma Discharge, Time Travel and the search for E.T. as well. March 11, 2010 http://www.redicecreations.com/

Channels: Major questions in astronomy 

Added: 2844 days ago by deek

Views: 2345 | Comments: 0

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00:52
00:52
00:52

Nicolaus Copernicus

Nicolaus Copernicus founder of Heliocentric Cosmology

Channels: The Astronomers  Planetary science  Cosmic Debris 

Added: 3691 days ago by adminn

Views: 2315 | Comments: 0

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03:40
03:40
03:40

The Electric Universe

The Thunderbolts Project: sequence from the film 'Thunderbolts'. www.thunderboltsproject.com = DVD's, books, Ebooks www.thunderbolts.info = articles, forums, blogs

Channels: Major questions in astronomy 

Added: 2844 days ago by deek

Views: 2025 | Comments: 0

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02:02
02:02
02:02

SDO: Solar Tornadoes (2012.02.07) [1080p]

Time-lapse animation showing enormous tornado-like vortices on the Sun's limb as seen by NASA's Solar Dynamics Observatory between 2012-02-07T08:00:00 and 2012-02-08T23:00:00. Each image in this animation was taken at 36 second intervals. credit: NASA/Goddard Space Flight Center Scientific Visualization Studio source: http://svs.gsfc.nasa.gov/goto?3919

Channels: Solar astronomy 

Added: 2746 days ago by deek

Views: 1980 | Comments: 0

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09:48
09:48
09:48

Tycho Brahe Johannes Kepler and Planetary Motion 1 of 2

An episode of "Great Moments in Science and Technology"

Channels: Major questions in astronomy 

Added: 3691 days ago by adminn

Views: 1716 | Comments: 0

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72:10
72:10
72:10

7 Keplers Laws

Fundamentals of Physics (PHYS 200) The focus of the lecture is problems of gravitational interaction. The three laws of Kepler are stated and explained. Planetary motion is discussed in general, and how this motion applies to the planets moving around the Sun in particular. Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses This course was recorded in Fall 2006.

Channels: Major questions in astronomy 

Added: 3691 days ago by adminn

Views: 1709 | Comments: 1

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05:02
05:02
05:02

Hubble Space Telescope Directly Observes Exoplanet

Science & Reason on Facebook: http://tinyurl.com/ScienceReason Hubblecast 22: Hubble Space Telescope Directly Observes Exoplanet Orbiting Fomalhaut. The NASA/ESA Hubble Space Telescope has discovered an extrasolar planet, for the first time using direct visible-light imaging. The strange world is far-flung from its parent star, is surrounded by a colossal belt of gas and dust, and may even have rings more impressive than Saturn's. --- Subscribe to Science & Reason: • http://www.YouTube.com/Best0fScience • http://www.YouTube.com/ScienceMagazine • http://www.YouTube.com/ScienceTV • http://www.YouTube.com/FFreeThinker --- Credit: - ESA/Hubble (M. Kornmesser & L. L. Christensen) - Visual design & Editing: Martin Kornmesser - Animations: Martin Kornmesser & Luis Calçada - Web Hosting: Leibniz-Rechenzentrum (LRZ) - Web Technical Support: Lars Holm Nielsen & Raquel Yumi Shida - Written by: Lee Pullen & Lars Lindberg Christensen - Host: Dr. J - Narration: Bob Fosbury - Cinematography: Peter Rixner - Music: movetwo - Footage and photos: A. Fujii, Digitized Sky Survey 2, NASA, ESA, and P. Kalas (University of California, Berkeley). Acknowledgment: Davide De Martin (ESA/Hubble) - Directed by: Lars Lindberg Christensen Dr. J is a German astronomer at the ESO. His scientific interests are in cosmology, particularly on galaxy evolution and quasars. Dr. J's real name is Joe Liske and he has a PhD in astronomy. Hubble European Space Agency Information Centre Garching/Munich, Germany • http://www.eso.org • http://www.spacetelescope.org • http://hubblesite.org .

Channels: Planetary science 

Added: 2838 days ago by deek

Views: 1706 | Comments: 0

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02:14
02:14
02:14

Earth Sized Tornado Spins On Sun's Surface Feb-2012.mpg

Vast solar tornado spins on the sun A tremendous tornado whirling across the surface of the sun was captured by a NASA satellite recently -- an amazing wonder of the solar system that may be as big as the Earth itself. The video was recorded by the Solar Dynamics Observatory (SDO), a sun-watching satellite that has transmitted a series of stunning photos of solar flares in recent months. The new video shows darker, cooler plasma shifting back and forth above the sun's surface over the span of nearly 30 hours stretching from Feb. 7 to Feb. 8. And the giant tornado may be as large as the Earth itself, with gusts of up to 300,000 mph, explained Terry Kucera, deputy SOHO project scientist and a solar physicist with NASA's Goddard Space Flight Center. Read more: http://www.foxnews.com/scitech/2012/02/17/vast-solar-tornado-spied-on-sun/#ixzz1mfrMpwlP Source http://www.foxnews.com/scitech/2012/02/17/vast-solar-tornado-spied-on-sun/ Related Video Tornado Season On The Sun? Youtube Channel VideoFromSpace http://www.youtube.com/watch?v=r-zt8qnTcLM&feature=player_embedded About the utube examiner's channel Video's on this channel are under Fair USE Law.17 U.S.C. § 107 Notwithstanding the provisions of sections 17 U.S.C. § 106 and 17 U.S.C. § 106A, the fair use of a copyrighted work, including such use by reproduction in copies or phonorecords or by any other means specified by that section, for purposes such as criticism, comment, news. This is what this channel is for Comments on Video subjects.Your Ideas suggestions and thoughts.

Channels: Solar astronomy 

Added: 2800 days ago by deek

Views: 1633 | Comments: 0

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04:22
04:22
04:22

Universe 114 Beyond Big Bang 17 Copernicus

The History Channel Australia & New Zealand The Universe : 1/14 Beyond The Big Bang : 1/7 Copernicus Learn about Copernicus' theories of a sun-centered universe. --- It all began inside a violent, blinding explosion that threw everything into chaos. Ever since, our greatest thinkers have peered into that chaos in search of order, logic & the answers to where we began. As earlier generations learned to decipher the cosmic clues of how we came to be, we stepped from revelation to revelation; epiphany to epiphany. Aristotle told us the world was round. Ptolemy conceived of a system of planets, stars & sun. Copernicus placed the sun at the center of this system. Galileo confirmed it. Newton explained what held it all together. Einstein offered insight into what fueled it. Hubble proposed it started with a "Big Bang". Our search for answers has shaped how we have evolved as thinking creatures. The Big Bang is the history of why & how we think about who & what we are. We'll contemplate how various cultures believe the world began & how it will all end...& what comes after. & for the first time, we'll be able to see what it might have all looked like, sitting in God's front row seats. Using unprecedented cutting edge animation, The Big Bang will recreate that amazing moment when everything started. With interviews from the world's leading physicists, engineers & historians we will employ every storytelling tool to make complex & confusing ideas clear, exciting & dramatic. Recreations, visual metaphors & first-person accounts will explain concepts like: the formation of galaxies, the existence of other dimensions & the idea of a parallel universe. The Big Bang will pose one of history's greatest questions, Where do we begin? --- http://www.thehistorychannel.com.au

Channels: The Astronomers 

Added: 3691 days ago by adminn

Views: 1629 | Comments: 0

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00:40
00:40
00:40

End of Sun Earth

short video of absolute certainty

Channels: Solar astronomy 

Added: 4045 days ago by cornelius

Views: 1605 | Comments: 1

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09:44
09:44
09:44

The Greatest Story Ever Sold

Fear is as illusion. remake/edit of first segment of Zeitgeist, The Movie

Channels: Cosmology 

Added: 4050 days ago by lonewolf

Views: 1570 | Comments: 0

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04:49
04:49
04:49

NASA SDO - Aurora; What Causes Them?

Aurora are colorful lights in the night time sky primarily appearing in Earth's polar regions. But what causes them? The culprit behind aurora is our own Sun and the solar plasma that is ejected during a magnetic event like a flare or a coronal mass ejection. This plasma travels outward along with the solar wind and when it encounters Earth's magnetic field, it travels down the field lines that connect at the poles. Atoms in the plasma interacts with atoms in Earth's upper atmosphere.

Channels: Solar astronomy 

Added: 2803 days ago by deek

Views: 1508 | Comments: 0

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02:50
02:50
02:50

The Higgs Boson, Part II: What is Mass?

What is mass and what does it have to do with the Higgs Boson? Part I: http://dft.ba/-higgsPart1 Also, explore a map of the big bang! http://www.bigbangregistry.com MinutePhysics is on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics And twitter - @minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Music by Nathaniel Schroeder Thanks to Nima Doroud for contributions and to Perimeter Institute for support. http://www.perimeterinstitute.ca

Channels: Physics 

Added: 2702 days ago by Ordonomundi

Views: 1506 | Comments: 0

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08:59
08:59
08:59

RIR W Thornhill The Electric Universe 12/12

Author and researcher Wallace Thorhill joins us to discuss his work and book "The Electric Universe". He has been working closely with David Talbot over at thunderbolts.info and he's one of the voices in the "Thunderbolts of the Gods" DVD. Previously we've had Donald Scott and Rens van der Sluijs with us on the program, also contributors to thunderbolts.info, now Wallace joins us for an excellent two hour program as we explore the exciting theory of the electric universe. Topics Discussed: Immanuel Velikovsky, The Saturn Myth, Ancient Solar system, Gravity, Electricity, Journal of Classical Physics, Einstein, the Electric Universe Theory, Quasars, Black Holes, The Standard Model of the Sun, Solar Activity, Anode, Glow Discharge, Photosphere, Magnetism, Twisted Pairs, DNA shape of a Galaxy, Dark Currents, Fractal, The Nature of Gravity, Infinite Speed, Nerve Signaling Speed, Tom Van Flandern, The Origins of the Universe, Longitudinal System, Tesla, Free Energy and more. Don't miss hour two coming up with Wallace Thornhill for Red Ice Members, a very interesting continuation as we talk about Deep Impact, Temple One, Comets, Gravity, Discharge, Lightning, Sprites, Earthquakes and the relationship between the Earth, the Sun, the Galaxy and the Universe. We also go into the very fascinating area of Proto-Saturn, Saturn as a Brown Dwarf, this is our origins, we talk about what Wall calls "the Purple Dawn of Creation" and where the mythology and stories comes from in terms of our ancient past with two suns. Our solar system used to be a Binary Star system. So what happened to Saturn, we can still see effects of that today with the rings of Saturn and the hexagonal glow at its poles? We talk about Venus, Mars, the Sun, The Moon and comet's. We also get Wall's take on the "Norway Spiral". We talk about Plasma Discharge, Time Travel and the search for E.T. as well. March 11, 2010 http://www.redicecreations.com/

Channels: Major questions in astronomy 

Added: 2844 days ago by deek

Views: 1296 | Comments: 0

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01:07
01:07
01:07

Tornado on the Sun Vast 300,000mph Planet-Sized

A tremendous tornado whirling across the surface of the sun was captured by a NASA satellite recently -- an amazing wonder of the solar system that may be as big as the Earth itself. The video was recorded by the Solar Dynamics Observatory (SDO), a sun-watching satellite that has transmitted a series of stunning photos of solar flares in recent months. The new video shows darker, cooler plasma shifting back and forth above the sun's surface over the span of nearly 30 hours stretching from Feb. 7 to Feb. 8. And the giant tornado may be as large as the Earth itself, with gusts of up to 300,000 mph, explained Terry Kucera, deputy SOHO project scientist and a solar physicist with NASA's Goddard Space Flight Center. "It's about 15,000 degrees Fahrenheit -- relatively cool," Kucera told FoxNews.com. After all, the sun's corona is a whopping 2 million degrees, she explained. Such tornadoes (Kucera classed it a "solar prominence") have been known of for decades; the European Space Agency's SOHO spacecraft captured evidence of them as early as 1996, mainly near the Sun's north and south poles at the time. And though they resemble their cousins here on Earth, they're created entirely differently, Kucera said -- through magnetism, not pressure and temperature fluctuations. "Those motions you see, it's all just moving along the magnetic field somehow -- but we're still looking to understand what's happening with these things," Kucera said. The storm was created by competing magnetic forces, which pull the charged magnetic particles on the sun back and forth, creating a spinning mass of plasma that tracks along strands of magnetic field lines, NASA explained. The spinning top of the tornado is mesmerizing, but Kucera noted the span of the prominence as well. The long, ribbon shapes could span hundreds of thousands of miles, she said. "In total length, this could be dozens of Earths -- quite large," she said. Such detailed, high-resolution recordings of the immense tornadoes was not possible until the launch of SDO. The satellite has several cameras on board that capture solar activity in different wavelengths and frequencies, all in the name of science. "Each wavelength of light tells us something different," she said. See more HERE: The CELESTIAL Convergence http://astronomicalsecrets.blogspot.com/2012/02/tornado-on-sun.html FAIR USE NOTICE: These pages/video may contain copyrighted (© ) material the use of which has not always been specifically authorized by the copyright owner. Such material is made available to advance understanding of ecological, POLITICAL, HUMAN RIGHTS, economic, DEMOCRACY, scientific, MORAL, ETHICAL, and SOCIAL JUSTICE ISSUES, etc. It is believed that this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, this material is distributed without profit to those who have expressed a prior general interest in receiving similar information for research and educational.

Channels: Solar astronomy 

Added: 2800 days ago by deek

Views: 1252 | Comments: 0

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06:46
06:46
06:46

THE SUN TODAY: 30 March 2011 - Solar Tornado?

WHAT IS HAPPENING ON THE SUN TODAY? (FULL SCREEN!) Solar Tornado? MY PLAYLISTS: Global Warming Quiz 1: http://www.youtube.com/my_playlists?p=A4FE7F9615C4B7A1 Global Warming Quiz 2: http://www.youtube.com/my_playlists?p=B3464AB11B92424D Other Climate Videos: http://www.youtube.com/my_playlists?p=23062464433DE63C Other Solar Videos: http://www.youtube.com/my_playlists?p=8D1845B15598D5A3 For more details go to my channel: www.youtube.com/user/drkstrong?feature=mhee Where you will find links to earlier editions of "THE SUN TODAY" as well as other solar related videos and a series of quiz questions and answers on global warming (sometimes with tongue firmly planted in cheek!). Enjoy! If you liked this video please vote thumbs up and pass it on to friends and relations who might find it interesting. Subscribe if you want to track daily updates. If there is something you did not like either leave a comment or send me a PM and let me know how I can improve the service. These videos are a hobby for a retired scientist; I receive no funding for them. Also check out the excellent NASA solar information and videos at: http://www.thesuntoday.org http://www.facebook.com/thesuntoday http://www.youtube.com/thesuntoday For up to the minute websites go to the NOAA Space Weather Prediction Center: http://www.swpc.noaa.gov/ Also an invaluable resource, often with interesting pictures at space weather.com A wonderful Magnetospheric Simulation can be found at: NICT, http://www2.nict.go.jp/y/y223/simulation/realtime/home.html There is a wealth of information and background on the various satellite and observatory websites (and links therein), e.g., http://sdo.gsfc.nasa.gov/data/ http://stereo-ssc.nascom.nasa.gov/beacon/beacon_secchi.shtml http://sohowww.nascom.nasa.gov/data/realtime/mpeg/ http://www.nso.edu/ If you want to play with the data you MUST check out: http://helioviewer.org/ Want to find your own comets: http://sungrazer.nrl.navy.mil/

Channels: Solar astronomy 

Added: 2800 days ago by deek

Views: 1241 | Comments: 0

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09:26
09:26
09:26

Ancient Observatories: Timeless Knowledge - Part 3

NASA Connect video containing four segments as described below. NASA Connect segment explaining the foundations of astronomy and the how the Earth moves relative to the sun. This segment explains how the Earth's tilt creates the 4 seasons. NASA Connect segment explaining how the height of the sun relates to the growing seasons and the length of daylight. This segment describes how Ancient Egyptian and Greek cultures used astronomy in their lives. The segment also contains an activity for exploring how a gnomon works. In the activity students must track the shadows made by a gnomon in 30 minute intervals. The activity will teach students how the length of the shadows and the angles created by the gnomon are related to the position of the sun. NASA Connect segment that shows two examples of how the Navajo used used structures to track progress of the sun in the sky. NASA Connect segment describing the Ancient Mayan civilization and their accomplishments. This segment compares the Mayan counting system to the Roman counting system and has a brief exercise for students to add the numbers 21 and 33 using both systems. Source: http://www.open-video.org/details.php?videoid=6505 Creative Commons license: Attribution 2.5 http://creativecommons.org/licenses/by/2.5/

Channels: The Astronomers 

Added: 3684 days ago by deek

Views: 1226 | Comments: 0

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08:56
08:56
08:56

Planetary Science: Exploring The Solar System

Science & Reason on Facebook: http://tinyurl.com/ScienceReason Science@ESA (Episode 7): Planetary science - Exploring our backyard, the Solar System (Part 2) In this seventh episode of the Science@ESA vodcast series Rebecca Barnes continues to journey through the wonders of modern astronomy bringing us closer to home as we begin to explore the Solar System. We'll discover the scale and structure of the Solar System, find out why we explore it and introduce the missions launched on a quest to further investigate our local celestial neighbourhood. --- Please subscribe to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceMagazine • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker --- Planetary science is the scientific study of planets (including Earth), moons, and planetary systems, in particular those of the Solar System and the processes that form them. It studies objects ranging in size from micrometeoroids to gas giants, aiming to determine their composition, dynamics, formation, interrelations and history. It is a strongly interdisciplinary field, originally growing from astronomy and earth science, but which now incorporates many disciplines, including planetary astronomy, planetary geology (together with geochemistry and geophysics), physical geography (geomorphology and cartography as applied to planets), atmospheric science, theoretical planetary science, and the study of extrasolar planets. Allied disciplines include space physics, when concerned with the effects of the Sun on the bodies of the Solar System, and astrobiology. There are interrelated observational and theoretical branches of planetary science. Observational research can involve a combination of space exploration, predominantly with robotic spacecraft missions using remote sensing, and comparative, experimental work in Earth-based laboratories. The theoretical component involves considerable computer simulation and mathematical modelling. Planetary scientists are generally located in the astronomy and physics or earth sciences departments of universities or research centres, though there are several purely planetary science institutes worldwide. There are several major conferences each year, and a wide range of peer-reviewed journals. • http://en.wikipedia.org/wiki/Planetary_science --- The Solar System is made up of the Sun and all of the smaller objects that move around it. Apart from the Sun, the largest members of the Solar System are the eight major planets. Nearest the Sun are four fairly small, rocky planets - Mercury, Venus, Earth and Mars. Beyond Mars is the asteroid belt - a region populated by millions of rocky objects. These are left-overs from the formation of the planets, 4.5 billion years ago. On the far side of the asteroid belt are the four gas giants - Jupiter, Saturn, Uranus and Neptune. These planets are much bigger than Earth, but very lightweight for their size. They are mostly made of hydrogen and helium. Until recently, the furthest known planet was an icy world called Pluto. However, Pluto is dwarfed by Earth's Moon and many astronomers think it is too small to be called a true planet. An object named Eris, which is at least as big as Pluto, was discovered very far from the Sun in 2005. More than 1,000 icy worlds such as Eris have been discovered beyond Pluto in recent years. These are called Kuiper Belt Objects. In 2006, the International Astronomical Union decided that Pluto and Eris must be classed as "dwarf planets". Even further out are the comets of the Oort Cloud. These are so far away that they are invisible in even the largest telescopes. Every so often one of these comets is disturbed and heads towards the Sun. It then becomes visible in the night sky. • http://sci.esa.int/science-e/www/area/index.cfm?fareaid=7 .

Channels: Planetary science 

Added: 2803 days ago by deek

Views: 1185 | Comments: 0

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01:25
01:25
01:25

Earth size tornado on Sun

Scientists have discovered through a new high tech telescope a tornado on the Sun the size of the Earth with wind gusts up to 300,00 miles per hour.

Channels: Solar astronomy 

Added: 2800 days ago by deek

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09:50
09:50
09:50

Hubble Space Telescope - Chapter 6

Part 6 in a series of videos produced by the ESA for public distribution about the Hubble Space Telescope and much more. This video is Copyright Free material with some restrictions. Find out more at: http://www.spacetelescope.org

Channels: The Astronomers 

Added: 3684 days ago by deek

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04:03
04:03
04:03

NASA Science - The Surprising Power of a Solar Storm

A recent flurry of eruptions on the sun did more than spark pretty auroras around the poles. NASA-funded researchers say the solar storms of March 8th through 10th dumped enough energy in Earth's upper atmosphere to power every residence in New York City for two years. "This was the biggest dose of heat we've received from a solar storm since 2005," says Martin Mlynczak of NASA Langley Research Center. "It was a big event, and shows how solar activity can directly affect our planet." Mlynczak is the associate principal investigator for the SABER instrument onboard NASA's TIMED satellite. SABER monitors infrared emissions from Earth's upper atmosphere, in particular from carbon dioxide (CO2) and nitric oxide (NO), two substances that play a key role in the energy balance of air hundreds of km above our planet's surface. "Carbon dioxide and nitric oxide are natural thermostats," explains James Russell of Hampton University, SABER's principal investigator. "When the upper atmosphere (or 'thermosphere') heats up, these molecules try as hard as they can to shed that heat back into space." That's what happened on March 8th when a coronal mass ejection (CME) propelled in our direction by an X5-class solar flare hit Earth's magnetic field. (On the "Richter Scale of Solar Flares," X-class flares are the most powerful kind.) Energetic particles rained down on the upper atmosphere, depositing their energy where they hit. The action produced spectacular auroras around the poles and significant1 upper atmospheric heating all around the globe. "The thermosphere lit up like a Christmas tree," says Russell. "It began to glow intensely at infrared wavelengths as the thermostat effect kicked in." For the three day period, March 8th through 10th, the thermosphere absorbed 26 billion kWh of energy. Infrared radiation from CO2 and NO, the two most efficient coolants in the thermosphere, re-radiated 95% of that total back into space. In human terms, this is a lot of energy. According to the New York City mayor's office, an average NY household consumes just under 4700 kWh annually. This means the geomagnetic storm dumped enough energy into the atmosphere to power every home in the Big Apple for two years. "Unfortunately, there's no practical way to harness this kind of energy," says Mlynczak. "It's so diffuse and out of reach high above Earth's surface. Plus, the majority of it has been sent back into space by the action of CO2 and NO." During the heating impulse, the thermosphere puffed up like a marshmallow held over a campfire, temporarily increasing the drag on low-orbiting satellites. This is both good and bad. On the one hand, extra drag helps clear space junk out of Earth orbit. On the other hand, it decreases the lifetime of useful satellites by bringing them closer to the day of re-entry. The storm is over now, but Russell and Mlynczak expect more to come. "We're just emerging from a deep solar minimum," says Russell. "The solar cycle is gaining strength with a maximum expected in 2013." More sunspots flinging more CMEs toward Earth adds up to more opportunities for SABER to study the heating effect of solar storms. "This is a new frontier in the sun-Earth connection," says Mlynczak, and the data we're collecting are unprecedented." Credit: NASA Science

Channels: Solar astronomy 

Added: 2803 days ago by deek

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