Rosetta’s Comet Looks Even Weirder When It’s Backlit By the Sun

By George Dvorsky on at

In its ongoing exploration of Comet 67P/Churyumov-Gerasimenko, the Rosetta spacecraft captured this stunning silhouette of the two-lobed mass from a distance of 200 miles. Wow.

The Philae comet lander may be dead, but its valiant mothership lives on. Rosetta recently ventured away from the comet to study its wider coma, tail, and plasma environment. At one point, when it was 200 miles (329 km) away, the spacecraft, comet, and sun aligned together at an angle of about 159 degrees. It was a perfect opportunity to take a picture.

Rosetta’s Comet Looks Even Weirder When It’s Backlit By the Sun
Enhanced NAVCAM image of Comet 67P/C-G taken on 27 March 2016, 200 miles (329 km) from the comet nucleus. The scale is 28 m/pixel and the image measures 28.7 km across. Image: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

The top portion of the comet is brilliantly illuminated, but the dark patches reveal the comet’s freaky two-lobed shape. Scientists theorise that the comet got its shape in the wake of a gentle, low-velocity collision between two objects. Visual evidence shows that certain layers on the comet are oriented in different directions, which indicates that two objects fused to form a single, though oddly shaped, comet.

Just to put the size of this thing in perspective, here’s what it looks like relative to the city of Paris.

Rosetta’s Comet Looks Even Weirder When It’s Backlit By the Sun
Image: Comet: ESA/Rosetta/Navcam; Map data ©2014 Google, Bluesky

In other Rosetta-related news, the European Space Agency just released 984 new NAVCAM images of the comet taken between December 16th, 2015 to February 9th, 2016. You can check them out here.

[Rosetta Blog]