Articles

Matthew Knight

Lowell Observatory's Matthew Knight addresses several points of confusion that have repeatedly come up in the coverage of Comet Lovejoy.

Adam Block

Astrophotgrapher Adam Block shares an image of Comet Lovejoy, which is currently visible with binoculars.

Mattias Malmer

Mattias Malmer shares his latest shape model of Comet 67P/Churyumov–Gerasimenko, created using data from the Rosetta spacecraft.

Emily Lakdawalla

A set of photos released by Mars Orbiter Mission last week completes the set of Mars spacecraft observations of the comet. Now we wait for science results!

Emily Lakdawalla

This morning ESA released a set of images of the Philae lander taken by the Rosetta orbiter during -- and after -- the lander's first touchdown. The images contain evidence for the spot Philae first touched the comet, and a crucial photo of Philae's position several minutes into its first long bounce.

Emily Lakdawalla

I'm just getting up to speed on the news from overnight, which is mostly good: Philae remained in contact with the orbiter (which means the CONSERT radar sounding experiment was working), and it's sitting stably on the surface, although it's not anchored in any way. And they released the first ÇIVA image from the ground!

Emily Lakdawalla

The Philae team scrambled all morning to comprehend the initially confusing status of the lander, and the picture is much clearer today. Speaking of which, there are lots more pictures!

Emily Lakdawalla

The landing happened on time just after 16:02 UT today! Philae mission manager Stephan Ulamec said:

Emily Lakdawalla

I'm reporting live from the press room at the European Space Operations Centre in Darmstadt, Germany. There's little news on Philae yet except that its status is good. Meanwhile, Rosetta scientists presented their first early comet results at the Division for Planetary Sciences meeting in Tucson, Arizona, which I watched from afar using Twitter.

A.J.S. Rayl

As winds whirled and converged to the west of Endeavour Crater, Opportunity's power dropped dramatically in October, but the Mars Exploration Rover (MER) pressed on. By month's end, the robot field geologist had completed her assignments – including capturing the first close-in shot of a comet from the surface of the Red Planet – and was roving onward through the darkness, driving the mission into the 130th month of what started out more than 10-and-a-half years ago to be a 3-month tour.

Emily Lakdawalla

It's been two weeks since comet Siding Spring passed close by Mars, and six of the seven Mars spacecraft have now checked in with quick looks at their images of the encounter. I round up all the results.

Bill Dunford

After a bad day on the launch pad, some perspective.

Emily Lakdawalla

I have been horribly behind in posting images from Rosetta's exploration of comet 67P/Churyumov-Gerasimenko, and that's a shame, because the spacecraft has lately been exploring the comet from a range of only 10 kilometers. From that range, the NavCam gets sub-meter resolution, and we're seeing a menagerie of odd surface features

Claudia Mignone

What do “light” and “dark” mean for an object like Comet 67P/C-G? Here are some details on how Rosetta's NAVCAM images are taken and displayed to make a wide range of surface features possible.

Peter Mattisson

The European satellite Herschel acquired images of Comet Siding Spring before its death in 2013 — thanks to an observing proposal from an amateur astronomer!

Emily Lakdawalla

All seven Mars spacecraft are doing perfectly fine after comet Siding Spring's close encounter with Mars.

Emily Lakdawalla

The nucleus of comet Siding Spring passes close by Mars on Sunday, October 19, at 18:27 UTC. Here are links to webcasts and websites that should have updates throughout the encounter.

Larry Crumpler

Opportunity will become a comet flyby mission beginning in mid-October. The comet Siding Spring will zoom past Mars at a distance of about 135,000 km on October 19.

Srinivas Laxman

With only 10 days remaining until the arrival of Comet Siding Spring at Mars, ISRO has shielded the Mars Orbiter Mission (MOM) from the comet. On Tuesday MOM’s orbit was altered so as to move it behind the Red Planet when the comet arrives. MOM will carry out observations of the comet and its Mars Colour Camera will click images of it.

Karl Battams

We're now less than two weeks away from Comet Siding Spring buzzing ridiculously close to Mars, and the excitement is building - in both good and bad ways...