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Philae landing site selection process under way as Rosetta closes to within 60 kilometers of the comet

Posted by Emily Lakdawalla on 2014/08/22 02:01 CDT | 9 comments

Rosetta spent the week transitioning to a lower orbit from which it continues to observe the comet. This weekend, the mission will select about five landing sites for more detailed study. They have also now estimated the mass of the comet.

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Comet Flyby Missions for Mars Rovers

Posted by Mark Lemmon on 2014/08/21 10:19 CDT | 2 comments

On October 19, the Mars rovers — like their orbiting cousins — will become comet flyby missions. Comet C/2013 A1 (Siding Spring) will pass within 140,000 km of Mars.

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Finding my way around comet Churyumov-Gerasimenko

Posted by Emily Lakdawalla on 2014/08/15 12:30 CDT | 30 comments

Rosetta has nearly completed its first funky three-cornered orbit in front of the comet. Each day we're getting views of the nucleus from more directions. I step you through Churyumov-Gerasimenko's geography.

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Mars orbiters plan for their October encounter with comet Siding Spring

Posted by Emily Lakdawalla on 2014/08/13 06:00 CDT | 2 comments

Now that we have reasonable confidence that our Mars orbiters will be safe from the close passage of comet Siding Spring, we are free to be excited about the opportunity that the encounter represents. At a community workshop on August 11, representatives from Mars missions shared their plans for great comet science.

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Comet Siding Spring: Risk Assessment

Posted by Karl Battams on 2014/08/07 01:29 CDT | 6 comments

On October 19, 2014, Comet Siding Spring is going to have an extremely close encounter with the planet Mars. The bottom line: it seems most likely that our Martian spacecraft will be absolutely fine.

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The Planetary Society Applauds ESA for Rosetta's Successful Comet Rendezvous

Posted by Jennifer Vaughn on 2014/08/06 05:28 CDT | 1 comment

The Planetary Society congratulates the European Space Agency on its Rosetta spacecraft arriving at comet 67P/Churyumov-Gerasimenko. Rosetta is the first spacecraft to orbit a comet.

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Rendezvous with a crazy world

Posted by Daniel Fischer on 2014/08/06 01:27 CDT | 1 comment

Beaming scientists all around, spectacular images on large TV screens, and the best - or at least most exciting - yet to come: such was the extraordinary scene at the European Space Operations Centre in Darmstadt, Germany, today as the European Space Agency's Rosetta spacecraft reached its cometary destination.

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"We're at the comet!" Rosetta has arrived at comet 67P

Posted by Emily Lakdawalla on 2014/08/06 04:58 CDT | 9 comments

After a journey of more than a decade, Rosetta has finally arrived at comet 67P Churyumov-Gerasimenko. Confirmation of the successful rocket firing came at about 9:30 UTC via a webcast from ESA's Operations Centre in Darmstadt, Germany.

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Today's the day Rosetta arrives at a comet!

Posted by Emily Lakdawalla on 2014/08/05 11:15 CDT | 2 comments

In less than a day, Rosetta will officially arrive, becoming the first spacecraft ever to orbit a comet! Watch an ESA Livestream of the arrival, and check out the latest photos.

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A new angle on Churyumov-Gerasimenko brings circular features into focus

Posted by Emily Lakdawalla on 2014/08/04 10:23 CDT | 4 comments

It's just two days now until Rosetta arrives in its initial 100-kilometer "orbit" of comet Churyumov-Gerasimenko, and the latest view from Rosetta's NavCam is fascinating. Circular features on the comet remind me of Tempel 1 as seen by Deep Impact and Stardust.

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[UPDATED] New Rosetta images show comet's craggy shape

Posted by Emily Lakdawalla on 2014/08/02 09:44 CDT | 1 comment

A shift in position has brought shadows into view from Rosetta, outlining scarps and ridges on Churyumov-Gerasimenko.

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New Rosetta view of the comet - and a comparison to other comets

Posted by Emily Lakdawalla on 2014/07/31 03:02 CDT | 8 comments

Rosetta's view of the comet is getting better and better. Today they released a new image from the high-resolution OSIRIS camera, and it's a very fresh one, taken only two days ago. Distinct features are coming into view. And it's finally detailed enough for me to compare it to the five other comets we've visited in the past.

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Rosetta update: Long journey to a comet nearly complete

Posted by Emily Lakdawalla on 2014/07/29 01:40 CDT | 4 comments

A journey of nearly a decade is almost over. Rosetta is making its final approach to comet 67P/Churyumov-Gerasimenko, and the comet's strange shape is beginning to come into focus. As of today, the spacecraft is only 2000 kilometers away from the comet, and 8 days away from arrival.

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A right old comet kerfuffle…

Posted by Stuart Atkinson on 2014/07/18 12:02 CDT | 16 comments

A European space enthusiast, children's author, and volunteer astronomy outreach worker asks for more images from Rosetta.

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Quick Rosetta update: Churyumov-Gerasimenko is a contact binary!

Posted by Emily Lakdawalla on 2014/07/15 08:42 CDT | 17 comments

I could not wait to post these amazing new images of comet Churymov-Gerasimenko from Rosetta. The nucleus of the comet is clearly a contact binary -- two smaller (and unequally sized object) in close contact.

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Rosetta completes another rocket burn, spies decreasing activity on comet

Posted by Emily Lakdawalla on 2014/06/19 10:42 CDT

Rosetta has now completed its three largest rendezvous burns as it approaches ever closer to comet 67P/Churyumov-Gerasimenko. Beginning on July 2, Rosetta will now conduct weekly burns, through August 6. Meanwhile, the cometary activity of April and May has quieted again, leaving the comet looking smaller than it did before.

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Deep Impact's last images

Posted by Emily Lakdawalla on 2014/05/27 07:13 CDT

Today I received an email notification of new public releases of some image data sets. I always love seeing new public space image data, but this notification was bittersweet: it included the first public release of the very last image data returned to Earth by Deep Impact, of a distant comet ISON.

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One Night Only, a New Meteor Shower that May Be Spectacular?

Posted by Bruce Betts on 2014/05/22 04:36 CDT | 3 comments

A new meteor shower, the Camelopardalids, will be peaking Friday night/Saturday morning (May 23/24). Especially if you are in North America, you are well positioned to see what may (or may not) be a spectacular show. In either case, scientists will learn about a comet’s history, and you can have a fun night looking at the sky.

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Intro Astronomy 2014. Class 10: Trans Neptunian Objects including Pluto, KBOs, Comets

Posted by Bruce Betts on 2014/04/18 06:42 CDT

Explore the worlds beyond Neptune including Pluto, Kuiper Belt Objects and comets in this video of class 10 of Bruce Betts' Introduction to Planetary Science and Astronomy class.

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Opposition time for Mars, and several months of dancing with the stars

Posted by ESA Mars Express Team on 2014/04/08 08:47 CDT | 1 comment

The Mars Express team showcases some of the best viewing opportunities of Mars in 2014, including how to spot Comet Siding Spring when it flies past Mars this October.

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