A close encounter with a mysterious moon

Paris (ESA) Oct 28, 2022

In 1877, the American astronomer Asaph Hall discovered two small moons circling the planet Mars, later named Phobos and Deimos after the Greek for 'fear' and 'panic'. But it was excitement, rather than fear and panic, that characterised the close encounter with Phobos made by ESA's Mars Express spacecraft in the run up to Halloween this year. The recent flyby of the larger martian moon off