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A new comet observing campaign for C/2013 A1 (Siding Spring)
You thought you were rid of us...but we're baa-aaack!

Posted by Karl Battams on 2014/01/27 11:22 CST | 1 comments

You thought you were rid of us...but we're back! Following the spectacular and, quite frankly unprecedented, success of the Comet ISON Observing Campaign, we are launching a similar venture for another unique cometary encounter that's happening this year. In October 2014, comet C/2013 A1 (Siding Spring) will pass extremely close to Mars.

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Planetary Radio: NEOWISE PI Amy Mainzer
NEOWISE has reawakened to discover more asteroids and comets. The mission leader thanks the amateur astronomers who follow up.

Posted by Mat Kaplan on 2014/01/01 12:56 CST | 1 comments

NEOWISE has reawakened to discover many more asteroids and comets. The mission leader thanks the amateur astronomers who follow up on these discoveries.

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Planetary Radio: Comet ISON, Rest in Pieces

Posted by Mat Kaplan on 2013/12/10 12:02 CST | 1 comments

Karl Battams of NASA's Comet ISON Observing Campaign is our guest on this week's show. He explains how ISON really did become the comet of the century for scientists.

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Comet ISON Wrap Up
A Tail of Cat-Possums and the Undead

Posted by Bruce Betts on 2013/12/05 05:49 CST

Comet ISON captivated our world, and many of our world’s robotic emissaries for many months. But, alas, poor ISON is dead -- again. Here I wrap up our enthusiastic coverage of this multi-morphing zombie comet that tried to survive and re-survive as it came within one solar diameter of the Sun.

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Comet ISON live blog

Posted by Emily LakdawallaBruce Betts on 2013/12/05 10:00 CST | 10 comments

Comet ISON reached perihelion at 18:25 UT (10:25 PT) on November 28. It's an event that's was watched around the world, accompanied by tons of commentary and streams of photos. We will update this blog entry periodically with links to all the resources that we hear of for following the comet's progress.

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Multiple views of comet ISON from solar-observing spacecraft

Posted by Emily Lakdawalla on 2013/12/02 07:50 CST | 6 comments

When comet ISON passed through perihelion last week, solar observing spacecraft had a ringside view. Here are several animations of ISON's perilous passage from the SOHO and two STEREO spacecraft.

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Comet ISON Hangouts November 25 and December 2

Posted by Emily Lakdawalla on 2013/12/02 11:00 CST | 3 comments

Two Hangouts bookended comet ISON's perihelion, hosted by Chuck Beuter of Comet Festival South Bend. On November 25, it was I and Ron Kaitchuck. On December 2, Alex Filippenko and I discussed what happened to the comet over Thanksgiving.

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Schrödinger's Comet

Posted by Karl Battams on 2013/11/28 09:54 CST | 9 comments

After impressing us yesterday, comet ISON faded dramatically overnight, and left us with a comet with no apparent nucleus in the SOHO/LASCO C2 images. As the comet plunged through the solar atmosphere, and failed to put on a show in the SDO images, we understandably concluded that ISON had succumbed to its passage and died a fiery death. Except it didn't. Well, maybe...

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Comet ISON: Your Half-time Report

Posted by Karl Battams on 2013/11/26 10:04 CST | 1 comments

I am heading out to Kitt Peak to join my fellow CIOC-ers Matthew and Casey for perihelion observations of Comet ISON, and I find myself having an early moment of reflection.

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ISON, Encke, Mercury, and Home

Posted by Karl Battams on 2013/11/22 10:04 CST | 3 comments

Comet ISON has entered the field of view of the STEREO HI-1A camera, and, in an awesome animation, it joins a large cast of characters already present there.

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Comet ISON Enters the Final Countdown

Posted by Karl Battams on 2013/11/19 03:12 CST | 6 comments

We're now less than two weeks away from comet C/2012 S1 (ISON) reaching perihelion and, if we’re honest, we are still none the wiser as to how the situation might play out!

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Video: Comet ISON: Super Bright or Super Lame?

Posted by Bruce Betts on 2013/11/12 02:47 CST | 2 comments

Comet ISON (C/2012 S1) was touted months ago by media as the possible comet of the century. Will it be that, or a cosmic dud? Find out the basics about the in this short video.

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Cosmos with Cosmos Episode 4: Heaven & Hell
In which face the consequences of our own knowledge

Posted by Casey Dreier on 2013/11/04 11:53 CST | 7 comments

Humans face the consequences of our own knowledge about the cosmos in this latest episode recap and analysis of Carl Sagan's classic series.

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Why does ISON look green?

Posted by Matthew Knight on 2013/10/29 12:23 CDT

You may have noticed that Comet ISON appears to have a green halo in some recent images, but in other images acquired at about the same time, it doesn’t. Thanks to the beautiful new spectrum posted earlier today by Christian Buil, it’s relatively easy to understand why.

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DPS 2013: The fascination of tiny worlds

Posted by Emily Lakdawalla on 2013/10/17 02:27 CDT | 7 comments

In which I summarize Joe Veverka's Kuiper Prize talk at the Division for Planetary Sciences meeting: "Small is NOT Dull: Unravelling the Complexity of Surface Processes on Asteroids, Comets and Small Satellites."

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An early look at Comet ISON

Posted by Jason Davis on 2013/10/08 01:01 CDT | 2 comments

Comet ISON is brightening as it approaches the Sun, and can now be seen from many ground-based telescopes.

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Cometary Science at EPSC

Posted by Geraint Jones on 2013/09/26 05:02 CDT

Recently, almost a thousand researchers gathered in London for Europe’s annual meeting of planetary scientists. Here's a report from one session on cometary science.

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Comet ISON lives on! (we think...)

Posted by Karl Battams on 2013/08/13 01:31 CDT | 1 comments

For several weeks now, ground-based observers have been blind to Comet ISON as our local star was sitting directly between us and the comet. I am delighted to share two pieces of good news: first, that ISON is still alive and well, and secondly that it has been recovered.

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Interplanetary eyes on the lookout for comet ISON

Posted by Daniel Fischer on 2013/08/09 02:15 CDT

Space blogger Daniel Fischer provides a preview of the exciting interplanetary observing campaign that has recently begun to study comet C/2012 S1 (ISON) from vantage points across the solar system.

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Pluto on the Eve of Exploration by New Horizons: A problem of cartography

Posted by Emily Lakdawalla on 2013/07/30 05:44 CDT | 6 comments

Last Thursday at the Pluto Science Conference there was a surprising and interesting talk by Amanda Zangari, who pointed out a serious problem with Pluto cartography.

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