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Comet ISON live blog

Emily Lakdawalla and Bruce Betts • December 05, 2013

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.

Multiple views of comet ISON from solar-observing spacecraft

Emily Lakdawalla • December 02, 2013

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.

Comet ISON Hangouts November 25 and December 2

Emily Lakdawalla • December 02, 2013

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.

Schrödinger's Comet

Karl Battams • November 28, 2013

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...

Comet ISON: Your Half-time Report

Karl Battams • November 26, 2013

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.

ISON, Encke, Mercury, and Home

Karl Battams • November 22, 2013

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.

Comet ISON Enters the Final Countdown

Karl Battams • November 19, 2013

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!

Video: Comet ISON: Super Bright or Super Lame?

Bruce Betts • November 12, 2013

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.

Cosmos with Cosmos Episode 4: Heaven & Hell

Casey Dreier • November 04, 2013

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

Why does ISON look green?

Matthew Knight • October 29, 2013

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.

DPS 2013: The fascination of tiny worlds

Emily Lakdawalla • October 17, 2013

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."

An early look at Comet ISON

Jason Davis • October 08, 2013

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

Cometary Science at EPSC

Geraint Jones • September 26, 2013

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.

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

Karl Battams • August 13, 2013

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.

Interplanetary eyes on the lookout for comet ISON

Daniel Fischer • August 09, 2013

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.

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

Emily Lakdawalla • July 30, 2013

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.

Found a Killer Asteroid? Who Ya Gonna Call?

Mat Kaplan • July 08, 2013

Astronomer Timothy Spahr directs the Minor Planet Center, the global clearinghouse for asteroids, comets and other relatively small objects in the solar system, including moons. He also coordinates the Society's Shoemaker NEO grant program.

Hubble captures time-lapse of comet ISON

Jason Davis • July 05, 2013

The Hubble Space Telescope captured a series of images showing Comet C/2012 S1 (ISON) plunging toward the sun.

Planetary Defense Conference 2013 Part 2

Bruce Betts • May 29, 2013

Second part of a three part wrap up to April's Planetary Defense Conference: a report on Planetary Shoemaker NEO Grant related activities and people at the Planetary Defense Conference 2013

Planetary Defense Conference 2013 Part 1

Bruce Betts • May 24, 2013

First part of a 3 part wrap up to April's Planetary Defense Conference: a very brief review of the status of research in asteroid threat related fields based on the conference, report on special activities at the conference, and links to video and audio related to the conference.

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