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More jets from Rosetta's comet!

Emily Lakdawalla • September 19, 2014

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.

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

Emily Lakdawalla • September 15, 2014

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.

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

Emily Lakdawalla • September 11, 2014

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.

Latest Rosetta NavCam images reveal jets on Churyumov-Gerasimenko

Emily Lakdawalla • September 04, 2014

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.

Rosetta identifies five possible landing sites for Philae

Emily Lakdawalla • August 26, 2014

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.

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

Emily Lakdawalla • August 22, 2014

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.

Finding my way around comet Churyumov-Gerasimenko

Emily Lakdawalla • August 15, 2014

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.

Rosetta's Big Day

Stuart Atkinson • August 06, 2014

Stuart Atkinson muses on the difference between the Europe of today and the Europe of a century ago in the context of Rosetta's momentous arrival at comet Churyumov-Gerasimenko.

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

Jennifer Vaughn • August 06, 2014

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.

Rendezvous with a crazy world

Daniel Fischer • August 06, 2014

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.

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

Emily Lakdawalla • August 06, 2014

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.

Today's the day Rosetta arrives at a comet!

Emily Lakdawalla • August 05, 2014

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.

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

Emily Lakdawalla • August 04, 2014

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.

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

Emily Lakdawalla • August 02, 2014

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

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

Emily Lakdawalla • July 31, 2014

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.

Rosetta update: Long journey to a comet nearly complete

Emily Lakdawalla • July 29, 2014

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.

A right old comet kerfuffle…

Stuart Atkinson • July 18, 2014

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

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

Emily Lakdawalla • July 15, 2014

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.

Rosetta’s comet is starting to take shape

Jason Davis • July 03, 2014

A new animation of 67P/Churyumov-Gerasimenko captured by the Rosetta spacecraft shows the comet rotating.

Rosetta completes another rocket burn, spies decreasing activity on comet

Emily Lakdawalla • June 19, 2014

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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