Image: Mawrth Vallis Martian mosaic

Sculpted by ancient water flowing on the surface, Mawrth Vallis is one of the most remarkable outflow channels on Mars. The valley, once a potentially habitable place, is one of the main features of a region at the boundary ...

Know thy star, know thy planet

When it comes to exoplanets, astronomers have realized that they only know the properties of the planets they discover as well as they know the properties of the stars being orbited. For a planet's size, precisely characterizing ...

Rocky planet found orbiting habitable zone of nearest star

An international team of astronomers including Carnegie's Paul Butler has found clear evidence of a planet orbiting Proxima Centauri, the closest star to our Solar System. The new world, designated Proxima b, orbits its cool ...

A new Goldilocks for habitable planets

The search for habitable, alien worlds needs to make room for a second "Goldilocks," according to a Yale University researcher.

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