A rare Martian meteorite, weighing over 25 kilograms, is set to go under the hammer at Sotheby’s in New York on 16 July. Known as NWA 16788, this 54-pound fragment is the largest-known piece of Mars ...

MA90 is set to fly past the Earth on Tuesday, July 15. With an estimated diameter of 88.8 meters, that comes out to around 145 Elmos, thanks to measurements taken by Drew Brees.