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  • On vous prend pour des cons et j'en rajoute une couche...
 
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Le Soleil du jour

 

 

 

LASCO C2

LASCO C3

 

 

    RAYONS X

 



               Magnétosphère

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

At 12:50 UT
Sp
Density: 1.46 p/cm3

 

 
   
 
 

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A LA UNE

27 novembre 2013 3 27 /11 /novembre /2013 10:41

Avec, en cadeau une belle éruption qui ne concerne pas la Terre...

 

20131127_0430_c3_512.jpg

 

20131127_0830_c3_512.jpg

 

Sur Stéréo B COR2, on la voit progressant vers le Soleil.

 

20131127_083924_d7c2B.jpg

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LLéa 28/11/2013 23:45


:)


 


Merci Néo.


Merci a tousss,


Bises,

neo 28/11/2013 19:22


ça a commencé ...


http://www.youtube.com/watch?v=q03I1B_yrPg&feature=share

neo 28/11/2013 18:01


à priori ,


la page serait passée sans encombre.


(-,


J'espère que cela vous fera plaisir


-,)


 

neo 28/11/2013 18:01


au cas où mes liens ne passeraient pas comme hier soir


je vous joins ici toute la page recopiée-collée


jusqu'à il y a 3 jours en AR en espérant


que cela ne perturbe pas le blog ...


 




#NASA











NASA
Partagé en mode public  -  17:40




 #ISON


 


 









 


Will #comet #ISON survive or meet a fiery
death when it whips around the sun today? Hangout w/ us from 1-3:30pmET: http://go.nasa.gov/1bnN1Qx 
























8 commentaires

 












Lorena Posada P.

17:52






 


Ya casi!!











Ajoutez un commentaire...














Frank Romano
Partagé en mode public  -  17:44




 #ISON


 


 









 


Quelle chance incroyable.






NASA Goddard a initialement partagé :





 


La bataille ultime du feu et de la glace! Qui va gagner, le soleil ou la comète #ISON ?

Joignez-vous à #NASA que nous suivons le voyage de la comète ISON comme il lance-pierres autour du soleil.

Seront la gravité impressionnante et l'énergie du soleil briser cette boule cosmique de glace et de roche? Est-il rompre? Ou faut-il passer le soleil intact de mettre sur un
spectacle éblouissant dans le ciel Décembre?

Regardez comme la NASA physiciens solaires de suivre la comète, LIVE à partir du contrôle de mission de Solar Dynamics Observatory de la NASA, @ NASA_SDO, pendant #ISON approche au plus près de l 'au soleil.

Nous allons également rejoints par les scientifiques comète assemblage de Kitt Peak Observatory en Arizona, où le télescope solaire va observer ISON et par la science écrivain
Phil Plait.

Scientifiques de la NASA répondront à vos questions en direct sur ​​l'air ici sur Google+, dans la section des commentaires YouTube pendant la diffusion en direct, ou via
Twitter en utilisant #ISON et #askNASA
.

Les participants à cette bulle comprennent:

• C. Alex Young, physicien solaire, directeur adjoint pour la science dans la Division des sciences Heliophysics et co-fondateur de The Sun d'aujourd'hui - Goddard Space Flight
Center de la NASA, Greenbelt, Md.,

• W. Dean Pesnell, physicien solaire et scientifique du projet pour le Solar Dynamics Observatory - Goddard Space Flight Center de la NASA, Greenbelt, Md.,

• Karl Battams, Comet scientifique pour le Naval Research Laboratory, Washington, DC, et l'énergie solaire plomb de sonde pour Comet ISON observation Campagne de la NASA, de
rejoindre de Kitt Peak Observatory en Arizona, où le télescope solaire va observer ISON.

• Phil Plait, écrit «Bad Astronomy" le blog de Slate et est un astronome, la science évangélisateur, et auteur du livre "Bad Astronomy» et «Mort des cieux!"

 · 












NASA Hangout: Comet
ISON LIVE


 









neo 28/11/2013 17:56


CADEAU : DIRECT LIVE TOUT à L'HEURE ...


https://plus.google.com/s/%23NASA

neo 28/11/2013 17:02


ssi celà vous intéresse:


Dear neo,

Join me and other scientists online today, Nov. 28, 2013, at 18 - 20:30 UT (1 - 3:30 pm EST) as we watch Comet ISON make the most perilous part of its 50 million year journey through the solar
system. ISON will be just over 1 million miles from the sun's surface and the Solar Dynamics Observatory (SDO) has planned special observations just for this event. Dean Pesnell (SDO Project
Scientist) and I will be in the SDO control and several scientists including Karl Battams (comet scientist with the Naval Research Lab) and Phil Plait (with slate.com and the "Bad Astronomer")
will join us virtually on a Google+ Hangout. http://go.nasa.gov/CometISONHangout


 - Alex


 An archive and RSS feed of past newsletters is now available.


















A NASA Google+ Hangout:
COMET ISON LIVE
 


The ultimate battle of fire and ice! Who will win, the sun or Comet ISON? 


 


Join The Sun Today and NASA as we follow the journey of Comet ISON as it slingshots around the sun. 


 


Watch as NASA solar physicists track the comet LIVE from the mission control for NASA's Solar Dynamics Observatory during ISON's closest approach to the sun.
... More


 Comet ISON Overview and Updates 




Comet ISON is fast approaching the culmination of its journey towards and hopefully around the sun. On November 28, 2013 at 18:45  UT
(1:45 EST) ISON reaches perihelion (closest solar approach) and scientists can't wait. ... More














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neo 28/11/2013 17:01




Comet ISON on November 28




The field of view of the SOHO mission’s LASCO C3 now fully shows Comet ISON.






Comet ISON on November 28, 2013 via NASA SOHO mission.



Two great links for learning more about Comet ISON at perihelion today:
Everything you need to know: Comet ISON
Today’s the day. Comet ISON has traveled a light-year’s distance, and over a million years of time, from the Oort comet cloud surrounding our solar system. Today, ISON will encounter the
sun. If it survives this encounter – and things are looking very good at this moment – Comet ISON may go on to become a beautiful comet in Earth’s sky.


Experience Comet ISON’s encounter with the sun online
Links to various opportunities for chats with experts and real-time images.




ISON on November 27. Image via ESA/NASA/Karl Battams at the Comet ISON Observing Campaign website.



Comet ISON brightened dramatically within the past 24 hours (although the latest word is that its brightness has now dropped a bit). On November 27, its brightness was beginning to overwhelm
the detector of the SOHO mission’s LASCO C3 instrument. That’s why NASA’s Karl Battams, who labeled this image, marked the saturation spike. The spike is not really part of
the comet; it’s just an artifact on the image created by so much brightness.





Want to see your photos on EarthSky?
Upload or share them today on Facebook or Google+.


 





Posted by Deborah Byrd







MORE FROM EARTH SKY




Best photos of Comet Lovejoy near Beehive star cluster


Comet ISON on November 10, 2013


Move over Comet ISON. A new Comet Lovejoy has arrived


How to spot Comet ISON this week


Comet ISON details emerge as it races toward the sun





neo 28/11/2013 17:00



Moon and Spica, then Mercury and Saturn, at dawn November 29













Tonight for November 28, 2013


Courtesy U.S. Naval Observatory








If you’re an early bird, up and about before dawn’s first light, simply look for the waning crescent moon to light
up the southeast sky on Friday, November 29. The star close to the moon is Spica, the brightest in the constellation Virgo the Maiden. But you’ll have to wait until early dawn to catch the planets Mercury and Saturn near the horizon and in the glow of morning twilight.


When can you see earthshine on a crescent moon?


The moon will be seen in the vicinity of Spica from all around the world before dawn.
However, if you reside in Alaska, you might not actually see Spica next to the moon in the predawn hours tomorrow (Friday, November 29). That’s because the moon will occult – cover
over – Spica for about an hour in that part of the world.


For example, as seen from Anchorage Alaska, Spica will disappear behind the moon around 7:03 a.m. local time and will reappear just before 8:09 a.m. local time. Click here to find out the occultation times for other Alaskan localities, remembering that the times are given
in Universal Time. Subtract 9 hours to convert Universal Time to your clock time in Alaska.


Mercury and Saturn at early dawn


Given a level and unobstructed horizon, you might be able to spot Mercury and Saturn low in the southeast sky around 75 to 60 minutes before sunrise. You can use the moon to help guide you to
these two morning planets, because the “bow” of the moon points in their direction. Binoculars may be helpful to see these two worlds in the glow of dawn!




You might need binoculars to catch Mercury and Saturn in the glow of dawn.



Rising times for the sun and planets in your sky


At present, Mercury is sinking toward the glare of sunrise day by day while Saturn is climbing away from it. You should have little trouble catching Saturn in the predawn sky in December 2013!


Consider how late the sun rises right now at mid-and-far northern latitudes. Make the most of the late sunrise to let the moon be your guide to the star Spica and the planets Mercury and Saturn
before sunup on Friday, November 29.



Bruce McClure





MORE FROM EARTH SKY




Moon near Libra’s alpha star, east of two planets on August 13


Watch for planet Mercury and Comet ISON before dawn


How to spot Comet ISON this week


Full moon, Leonid meteors, Comet ISON on November 16-17


Watch for North Taurid meteors, four planets, tonight



neo 28/11/2013 17:00


By Deborah Byrd in
Blogs | Human World | Space on Nov 28, 2013









Experience Comet ISON’s encounter with the sun online

















ISON’s moment of truth is here – its closest approach to the sun – today. Here are some ways to experience it online.
















Comet ISON has traveled for at least a million years, pulled by the gravity of the sun that binds it, and us, in orbit. Now ISON’s moment of truth is here – its closest point to the sun, or
perihelion – today, November 28, 2013 at around 18:44 UTC/ 1:44 p.m. EST. The comet is
difficult, probably impossible, to view from Earth right now; it is temporarily lost in the sun’s blinding glare. How can you see Comet ISON as it sweeps closest to the sun that binds it in
orbit … and may destroy it? The best bet for the few hours around perihelion may be NASA’s SDO page. Experts will be answering
questions live from Twitter; use the hashtags #ISON and #askNASA. But there are many other possibilities! Follow the links below to learn how you can experience ISON’s encounter with the sun
today, online.



Do NOT do this to experience ISON closest to the sun



If I can’t see ISON closest to the sun on November 28, who can see it?



Google hangout with experts at 18:00 – 20:30 UTC (1:00 – 3:30 p.m. EST) on November 28.



Watching Comet ISON with the SDO spacecraft, at perihelion



How can I see Comet ISON with the STEREO spacecraft?



How can I see Comet ISON with the SOHO spacecraft?



How can I see Comet ISON with the Hinode spacecraft?



What will happen to ISON when it’s closest to the sun?


Everything you need to know: Comet ISON 2013




Comets ISON (brighter) and Encke from November 19-22, 2013 as seen encountering the solar wind. Image via Karl Battams/NRL/NASA-CIOC.





Do NOT look up at the sun this week, expecting to see Comet ISON. You won’t see it, and you might damage your eyes, permanently. Photograph by John Zenkus. Thank you, John!



Do NOT do this to experience ISON closest to the sun. We’ve seen several images already on EarthSky’s Facebook page
posted by people who aimed their cameras at the sun, thinking they could snap a shot of Comet ISON. Do NOT do this. Never look at the sun in any way, searching for Comet ISON. Especially
don’t look near the sun with binoculars, cameras or any other optical aid. You know that staring at the sun directly can burn the retina of your eye, without causing any pain. It can damage
your eyes, permanently. Also, remember, ISON is tiny in contrast to its parent star. If you’re on Earth, you will not catch it when closest to the sun on November 28. Those posts on
our Facebook page? Not Comet ISON.


If I can’t see ISON closest to the sun on November 28, who can see it? We’ll see Comet ISON with our spacecraft: the robot extensions of our eyes. ESA and NASA have a fleet
of spacecraft poised to observe the comet. Most observations have already begun. Keep reading, and you’ll find links to spacecraft observations of the comet, which you can access online. Here
are the dates of the planned NASA spacecraft observations.



Nov 21-28: STEREO-A Heliospheric Imager


Nov 26-29: STEREO-B coronagraphs


Nov 27-30: SOHO coronagraphs


Nov 28-29: STEREO-A coronagraphs


Nov 28: SDO


Nov 28: Hinode



Google hangout with experts at 18:00 – 20:30 UTC (1:00 – 3:30 p.m. EST) on November 28. NASA is holding a live video Hangout on G+ during ISON’s perihelion passage. You can
watch Comet ISON’s perihelion live, with the Slate’s Bad Astronomer Phil Plait, plus astronomers C. Alex Young, W. Dean Pesnell and Karl Battams (aka @SungrazerComets on Twitter and a blogger at NASA’s Comet ISON
Observing Campaign website, who, in my opinion, has done more to keep us updated on Comet ISON than anyone on Earth!). There will be live feed from NASA’s SOHO Sun-observing satellite
(that should be spectacular) and from the Kitt Peak Observatory solar telescope. The event is from 18:00 – 20:30 UTC (1:00 – 3:30 p.m. EST).


Watching Comet ISON with the SDO spacecraft, at perihelion NASA’s Solar Dynamics Observatory, or SDO, will view the comet for a few hours during its closest approach to the
sun. SDO’s real-time images can let you see the comet at closest approach and may be your best bet for watching the comet online. Look for SDO views of Comet ISON here.


One exciting possibility, NASA says, is that we might see extreme-ultraviolet emission from the comet when it’s closest to the sun.


In SDO’s view, the comet will appear to travel above the sun, and the SDO instruments will point away from the center of the sun to get a better view for three hours on November 28.





neo 28/11/2013 16:34


Slt:


http://www.lecosmographe.com/blog/comete-ison-rendez-vous-soleil-en-photos-videos/


http://cometison.gsfc.nasa.gov/

Al198 28/11/2013 14:09


Salut ferlin,


 


Un beau spectacle en perspective ce soir sur SDO, au plus proche du Soleil comme Lovejoy la derniere fois.

SCIENCES - La rencontre pourrait donner lieu à un feu d'artifice. Mais la comète pourrait aussi faire pschitt. On sera fixé jeudi entre 19h et 20h30, lors de l'approche finale...

Alors que les dindes rôtiront dans les fours américains pour Thanksgiving, jeudi, la comète ISON a une «date» avec le Soleil. Elle sera torride, elle sera brutale, à tel point que cette boule de
glace et de poussière pourrait ne pas y survivre et se consumer totalement, jusqu'à une petite mort cosmique. Mais elle pourrait également briller de mille feux.

Comment suivre l'événement en direct?

La Nasa organise un Google hangout entre 19h et 20h30 (heure de Paris), jeudi, à cette adresse. Via un chat vidéo, des astronomes commenteront les images en temps réel lors de l'approche finale.


Ici: http://cometison.gsfc.nasa.gov/#


Et là: https://plus.google.com/events/c8t7i5dbr1k50oq89giloiqe8rc


@+

Ferlinpimpim 28/11/2013 20:18


Salut Al... Aux dernières nouvelles, elle est morte... Mais à confirmer... Snif....


neo 27/11/2013 19:06


à suivre ssi ciel bien dégagé ...


 


http://youtu.be/4Ed0voNQwA8


 


http://lunarmeteoritehunters.blogspot.fr/2013/11/comet-ison-activity-video-updates.html?utm_source=feedburner&utm_medium=email&utm_campaign=Feed:+LatestWorldwideMeteor/meteoriteNews+%28Latest+Worldwide+Meteor/Meteorite+News%29

neo 27/11/2013 19:01


27 November 2013





Comet ISON Activity Video Updates 26/27NOV2013 - ISON The Sheep Herder



Comet ISON Activity Video Updates 26/27NOV2013 - ISON The Sheep Herder

Update..Now JPL ??? Says Ison has been here before!

Posted on YouTube by BPEarthWatch 301 plus views

ISON /IT IS ON NOW/ Solar Burst


Posted on YouTube by BPEarthWatch 1,790  views

ISON Regains the Ion Tail/Charge
Posted on YouTube by BPEarthWatch 10,815 views

NASA Now Says Ison could be Dis-intergrating.


Posted on YouTube by BPEarthWatch 10,815 views

COMET ISON Breaking News: Fragmentation Event ? The Nucleus May Be Non-Existent

Posted on YouTube by nemesis maturity 1,402 views

2013 THE Year of Meteors, Asteroids, Comets, and MORE!!




Email
ThisBlogThis!Share to
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neo 27/11/2013 19:00


26 November 2013





Comets ISON and Encke updates and DEC Astronomy Update 26NOV2013



Comets ISON and Encke updates and DEC Astronomy Update 26NOV2013










Comet Ison 2013
Image Credit- NASA





NASA Hosts Nov. 26 Teleconference and Nov. 28 Hangout to Discuss Comet Nearing
SunNASA will host a media teleconference Tuesday, Nov. 26 and a Google+ HangoutThursday, Nov. 28 to discuss Comet ISON's journey through our solar system and what the public worldwide may see in the coming days as the comet traverses the sun on
Thanksgiving Day....To join the Hangout, visit:http://go.nasa.gov/IiODhsLive audio of the teleconference will be streamed at:http://www.nasa.gov/newsaudioFor NASA TV streaming video, downlink and
scheduling information, visit:http://www.nasa.gov/nasatv--------------------------

A Tale of Two Comets: MESSENGER Captures Images of Encke and ISON
MESSENGER Mission News- November 25, 2013
On November 18, NASA's Mercury-orbiting MESSENGER spacecraft pointed its Mercury Dual Imaging System (MDIS) at 2P/Encke and captured this image

of the comet as it sped within 2.3 million miles (3.7 million kilometers) of Mercury's surface. The next day, the probe captured this companion image  
of C/2012 S1 (ISON), as it cruised by Mercury at a distance of 22.5 million miles (36.2 million kilometers) on its way to its late-November closest approach to the Sun. MESSENGER's
cameras have been acquiring targeted observations

of Encke since October 28 and ISON since October 26, although the first faint detections   didn't come until early November. During the closest approach of
each comet to Mercury, the Mercury Atmospheric and Surface Composition Spectrometer (MASCS) and X-Ray Spectrometer (XRS) instruments also targeted the comets. Observations of ISON
conclude on November 26, when the comet passes too close to the Sun, but MESSENGER will continue to monitor Encke with both the imagers and spectrometers through early December. ...
--------------------------


Track Comet ISON's Journey as Bright Planets and Starry Events Fill the Sky this December
Posted on YouTube by nemesis maturity 1 view

Comet ISON NASA's Latest Update: Dazzle or Dust? Get the Facts About Comet ISON
Posted on YouTube by nemesis maturity 108 views

Tonight's Sky December 2013 - Constelations, Deep-Sky Objects, Planets and Events HDPosted on YouTube by nemesis maturity 87 views

neo 27/11/2013 17:04


http://www.space.com/19796-comet-ison-explained-infographic.html?cmpid=555138


 






Comet of the Century? Sun-Grazing Comet ISON Explained (Infographic)



by Karl Tate, SPACE.com Infographics Artist   |   March 25, 2013 07:00am ET













Named after the International Scientific Optical Network, Comet ISON
— officially designated "C/2012 S1 (ISON) — has the potential to be the most spectacular comet of the
century. But it could also prove to be a dud. A critical moment will be perihelion passage, when the comet comes closest to the sun.


On Nov. 28, 2013, the head of the comet passes 800,000 miles (1.2 million kilometers) above the sun's surface. This is closer
to the sun's surface than the sun's own diameter. [Will Comet ISON Sizzle or Fizzle? (Video)]


If it survives its close brush with the sun without breaking up, Comet ISON will make a hairpin turn past the sun, whipping
around onto the outbound leg of its orbit. The comet could provide a spectacular display in Earth’s skies in November and December.


Comet ISON Seen By NASA Spacecraft | Video


Astronomers have high hopes because Comet ISON seems to be a new comet fresh from the Oort cloud, a zone of
deep-frozen objects orbiting in the dark outlands of our solar system. The most optimistic prediction is that Comet ISON could rival the Great Comet of 1680. [Photos of Comet ISON]


The performance of comets cannot be accurately predicted. Some previous "great comets" such as Comet Elenin in 2011, fizzled instead. 


Comet ISON is believed to be making its first trip to the sun, and so is hoped to still have most of its volatiles intact.
Volatiles are the substances which heat up and blast off the comet's nucleus to form the wispy comet tail which can stretch for millions of miles through space.


Editor's note: If you have an amazing picture of Comet ISON or any other night sky view that you'd like to share for a possible
story or image gallery, send photos, comments and your name and location to managing editor Tariq Malik at spacephotos@space.com.



Will Comet ISON be Comet of the Century?


Amazing Comet Photos of 2013 by Stargazers


Comets: Formation, Discovery and Exploration


Photos: Spectacular Comet Views from Earth and Space



Follow
us @Spacedotcom, Facebook or Google+.



Embed: Paste the code below into your site.




Source SPACE.com: All about our solar system,
outer space and exploration








More Infographics


 




SpaceX's Dragon Space Capsule Explained (Infographic)



 




Comet Pan-STARRS in Night Sky Explained (Infographic)



 




How SpaceX's Dragon Space Capsule Works (Infographic)









neo 27/11/2013 17:03


http://www.space.com/23758-comet-ison-solar-storm-thanksgiving.html?cmpid=555138


 




Could Incoming Comet ISON Lose Its Tail to a Thanksgiving Sun Storm?



By Megan Gannon, News Editor   |   November 26, 2013 09:45pm ET




       









It's difficult to predict exactly what will happen when the potentially great Comet ISON makes a sharp turn around the sun on Thanksgiving Day (Nov. 28). But one thing is certain: The journey
will be dangerous.


At less than 730,000 miles (1.2 million kilometers) from the sun's surface, solar eruptions could rock the icy comet. Experts with NASA say lessons from another comet's tail-clipping
encounter with the sun in 2007 presents a forbidding example of what could happen to Comet ISON.







The deep-frozen Comet ISON could blaze spectacularly as it whips past the sun at Thanksgiving 2013. Learn all
about Comet ISON's 2013 visit to the inner solar system in this SPACE.com infographic.
Credit: Karl Tate, SPACE.com contributor




That lesson comes from Comet Encke, which faithfully completes one orbit around the sun every 3.3 years and is one of the most studied comets in history. When it approached the sun in 2007, a
coronal mass ejection, or CME, burst from our star and struck the comet, tearing off its tail. NASA's STEREO spacecraft captured images of the violent encounter as this video animation of the comet shows.


 


The U.S. Naval Research Lab's Angelos Vourlidas, who is participating in NASA's Comet ISON Observing Campaign (CIOC) explained why Comet ISON, at about 30 times closer to the sun than Comet
Encke, could face an even worse fate. [Photos of Comet ISON: A Potentially Great Comet]


"For one thing, the year 2007 was near solar minimum," Vourlidas said in a statement from NASA. "Solar activity was low. Now, however, we are near the peak of the solar cycle and eruptions
are more frequent."







Comet ISON entered the view of NASA's Solar Terrestrial Relations
Observatory on Nov. 21, 2013, where it can be seen with Earth, Mercury and comet 2P/Encke.
Credit: Karl Battams/NASA/STEREO/CIOC

View full size image





Vourlidas was referring to sun's 11-year weather cycle. The solar maximum is typically marked by an increase in sunspots, the dark, temporary regions on the sun's surface that can give rise
to CMEs.


When Comet ISON approaches the sun, it might be headed for a "hot zone" of CMEs, said Karl Battams, an
astronomer at the Naval Research Lab who is also watching the comet. On Thursday, Comet ISON is expected to pass over the sun's equator on the same side of a recently active cluster of
sunspots. 


"I would absolutely love to see Comet ISON get hit by a big CME," Battams said in a NASA statement. "It won't hurt the comet, but it would give us a chance to study extreme interactions with
the comet's tail."


Because the gas inside a CME is not very dense, the impact of this magnetized cloud of plasma would not be strong enough to tear apart a comet's core, according to NASA. A CME could, however,
yank the comet's fragile tail.


And while the CME that hit Comet Encke back in 2007 was quite slow, Vourlidas believes a CME slamming into Comet
ISON could have a more dramatic effect.


"Any CME that hits Comet ISON close to the sun would very likely be faster, driving a shock wave with a much stronger magnetic field," Vourlidas explained in a statement. "Frankly, we can't
predict what would happen."


 



Comet Quiz: Test Your Cosmic Knowledge




Comets are debris left over after the solar system formed 4.6 billion years ago. Let's see what you know about these ancient and elusive celestial wanderers.


Start the Quiz





 




0 of 10 questions complete





Both Comet ISON and Comet Encke are in the field of view STEREO-A's Heliospheric Imager, their tails waving back and forth with the solar wind. According to NASA, it is possible that both
could be hit by the same CME, which would give researchers a chance see how these objects would react to widely separated locations


While ISON has slipped out of view for skywatchers on the ground, NASA's space-based fleet of solar observatories will be watching when ISON's close encounter, including STEREO-A and
STEREO-B, the Solar Dynamics Observatory and the Solar and Heliophysics Observatory.


Editor's note: If you snap an amazing picture of Comet ISON or any other night sky view that you'd like to share for a possible story or image gallery, send photos, comments
and your name and location to managing editor Tariq Malik at spacephotos@space.com.


You can follow the latest Comet ISON news, photos and video on SPACE.com.


Follow Megan Gannon on Twitter and Google+. Follow us @SPACEdotcom, Facebook or Google+. Originally published
on SPACE.com.





EDITOR'S RECOMMENDATIONS



Can Comet ISON's Tail Survive Solar Storm? | Video






neo 27/11/2013 17:02


http://www.space.com/23759-comet-ison-near-sun-nasa-video.html?cmpid=555138


 




Comet ISON Nears Sun for Thanksgiving Encounter in NASA Video



by Tariq Malik, Managing Editor   |   November 26, 2013 10:15pm ET




       









A NASA spacecraft has captured its best video yet of the icy Comet ISON streaking toward a Thanksgiving Day encounter with a sun, a close shave that the comet might just not survive.


The latest video of Comet ISON comes from NASA's STEREO-A spacecraft, one of several
sun-watching space observatories tracking the comet's close encounter with the sun on Thursday (Nov. 28).







The deep-frozen Comet ISON could blaze spectacularly as it whips past the sun at Thanksgiving 2013. Learn all
about Comet ISON's 2013 visit to the inner solar system in this SPACE.com infographic.
Credit: Karl Tate, SPACE.com contributor




"This movie from the spacecraft's Heliospheric Imager shows Comet ISON, Mercury, Comet Encke and Earth over a five-day period from
Nov. 20 to Nov. 25, 2013," NASA officials wrote in a video description. "The sun sits right of the field of view of this camera." [Comet ISON's Thanksgiving Sun Encounter: Complete Coverage]


 


Known officially as C/2012 S1 (ISON), Comet ISON is what scientists call a "sungrazer" comet because its orbit brings it extremely close to the sun. It is that extremely close solar shave,
less than one diameter of the sun away, that has scientists guessing as to whether ISON will survive the encounter.


In the video, Comet ISON appears as a bright object streaking from left to right as it draws ever closer to the sun. Comet Encke, meanwhile, appears as a dimmer object moving from the upper
left to lower right. The planets Mercury and Earth and labeled in the STEREO-A view.


NASA scientists, amateur astronomers and a fleet of spacecraft are tracking Comet ISON's solar
passage on Thursday. The comet has drawn wide interest because of its potential to be a spectacular sight in the night sky, with some scientists dubbing the object a possible "comet
of the century."


Comet ISON's origins in the distant Oort cloud, a realm of icy objects surrounding the entire solar system, has scientists excited because ISON is a pristine sample of the raw ingredients
that formed Earth and other planets in the solar system.


 



Comet Quiz: Test Your Cosmic Knowledge




Comets are debris left over after the solar system formed 4.6 billion years ago. Let's see what you know about these ancient and elusive celestial wanderers.


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Comet ISON was discovered in September 2012 by Russian amateur astronomers Vitali Nevski and Artyom Novichonok. Since then, it has been meticulously followed by professional and amateur
astronomers using ground-based telescopes, as well as space-based observatories. The Hubble Space Telescope and NASA spacecraft orbiting Mars and Mercury have also captured images of the
incoming comet.


On Thursday, NASA will hold a Google Hangout from 1 p.m. to 3:30 p.m. EST (1800 to 2030 GMT) to stream live views of the comet during its close sun approach. You will be able to watch the Comet ISON hangout live on SPACE.com here.


Editor's note: If you snap an amazing picture of Comet ISON or any other night sky view that you'd like to share for a possible story or image gallery, send photos, comments
and your name and location to managing editor Tariq Malik at spacephotos@space.com.


You can follow the latest Comet ISON news, photos and video on SPACE.com.


Email Tariq Malik at tmalik@space.com or follow him @tariqjmalik and Google+. Follow us @Spacedotcom, Facebook and Google+. Original article on SPACE.com.





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