To support alien life, a planet doesn’t have to be exactly like Earth, but it does need a few key ingredients. First, it should orbit its star at the right distance, where temperatures allow liquid ...

The newly discovered exoplanets, designated as GJ 9827 b, c and d, are located fairly close to their host star, completing orbits within 6.2 days. ESO A nearby 'super‑Earth' just 25 light years from ...