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Philae's landing day announced as Rosetta swings to comet's dark side

Posted by Emily Lakdawalla on 2014/09/26 03:36 CDT | 2 comments

ESA announced today that Philae will be landing on November 12, 2014. What time the landing occurs depends on which landing site they use. If they go to the prime landing site, "site J," Earth should receive word of the successful landing at 16:00 UTC (08:00 PST). If they go to the backup site, "site C," news will reach Earth at about 17:30 UTC (09:30 PST). Mark your calendars!

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A Tour of 67P...

Posted by Stuart Atkinson on 2014/09/23 05:58 CDT | 4 comments

Stuart Atkinson takes us on a stunning guided visual tour of Comet 67P/Churyumov–Gerasimenko.

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More jets from Rosetta's comet!

Posted by Emily Lakdawalla on 2014/09/19 01:07 CDT | 9 comments

Another lovely view of comet Churyumov-Gerasimenko contains jets. Bonus: Emily explains how to use a flat field to rid these glorious Rosetta NavCam images of faint stripes and specks.

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Comet Siding Spring Mars encounter: One Mars Express plan becomes two

Posted by ESA Mars Express Team on 2014/09/17 10:44 CDT | 2 comments

The Mars Express Flight Control Team at ESOC have been actively preparing for the flyby of comet C/2013 A1/Siding Spring on October 19. Initial estimates gave the possibility that Mars Express might be hit by 2 or 3 high-speed particles. Happily, additional observations by ground and space telescopes have shown the risk to be much lower – and perhaps even as low as zero. In today's blog post, the team explain how this (happy!) real-life, real-time development is affecting their preparations for fly-by.

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A landing site for Philae, but it's not going to be easy

Posted by Emily Lakdawalla on 2014/09/15 04:53 CDT | 7 comments

This morning, the European Space Agency announced the selection of a landing site for little Philae on the head of comet Churyumov-Gerasimenko. Although a primary site has been selected, landing Philae successfully is going to be tough, and the mission is now working to manage people's expectations.

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New Rosetta views and first science on comet Churyumov-Gerasimenko from EPSC

Posted by Emily Lakdawalla on 2014/09/11 04:56 CDT | 3 comments

At the European Planetary Science Congress held this week in Portugal, the Rosetta team showcased some early science results from Rosetta's mission to comet Churyumov-Gerasimenko.

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So Close and Yet So Far: Why isn't Siding Spring going to sandblast Mars?

Posted by Tony Farnham on 2014/09/09 09:02 CDT | 5 comments

Comet Siding Spring is going to make a very close approach to Mars in October. Any comet dust that reaches Mars has the potential to inflict significant damage on the spacecraft orbiting the planet. As it turns out, however, Mars and its orbiters are likely to see very few, if any, impacts. Why?

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Latest Rosetta NavCam images reveal jets on Churyumov-Gerasimenko

Posted by Emily Lakdawalla on 2014/09/04 12:12 CDT | 5 comments

ESA released another set of NavCam images of the comet today, and lo and behold, there are jets! We knew they were there, from an earlier OSIRIS image, but it's tremendously cool to see the comet behaving like a proper comet should.

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ESA invites amateurs to produce portraits of comet 67P

Posted by Emily Lakdawalla on 2014/09/01 12:01 CDT

After a pause of about a week in daily image releases from Rosetta, ESA has begun sharing four-image sets of photos of comet Churyumov-Gerasimenko and invited the public to help produce pretty pictures from them.

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The Pivotal Discovery You’ve Probably Never Heard Of

Posted by Karl Battams on 2014/08/29 02:09 CDT | 5 comments

Karl Battams highlights the historic discovery, by an Air Force satellite, of a sungrazing comet.

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Rosetta identifies five possible landing sites for Philae

Posted by Emily Lakdawalla on 2014/08/26 09:59 CDT | 8 comments

The Rosetta team has announced the selection of five regions on Churyumov-Gerasimenko that they will study as possible landing sites for little Philae. Now, as Rosetta surveys the comet from its second triangular "orbit" at an average distance of 60 kilometers, the mission will target these spots for extra attention.

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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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