Mars
Live coverage: ExoMars orbiter safely arrives at Mars, lander’s fate uncertain
Live coverage of the ExoMars Trace Gas Orbiter and the Schiaparelli lander arriving at Mars. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
How Martian moon Phobos became the ‘Death Star’
The dominant feature on the surface of Mars’ largest satellite, Phobos, is Stickney — a 9-kilometre-wide mega crater that spans nearly half the moon. The crater lends Phobos a physical resemblance to the planet-destroying Death Star in the film “Star Wars.” But over the decades, understanding the formation of such a massive crater has proven elusive for researchers.