Unlike our Moon, which is about one quarter the size of Earth, Phobos, the largest of Mars’s two moons is tiny – just 25 kilometres across. That makes it smaller than London.

In this new image, released from The Mars Orbiter, Phobos is seen passing in front of Mars back in October.

The gorgeous views of our solar system just keep on coming!

The largest Martian moon, Phobos, in front of the Red Planet [credit: ISRO]