NASA launched the twin Gravity Recovery and Interior Laboratory (GRAIL) satellites in 2011 to orbit and map the Moon's surface gravity in unprecedented detail. Pictured above is a resulting GRAIL gravity map, with regions of slightly lighter gravity shown in blue and regions of slightly stronger gravity shown in red. Analysis of GRAIL data indicates that the moon has an unexpectedly shallow crust than runs about 40 kilometers deep, and an overall composition similar to the Earth.
Largest water reservoir discovered in black hole. The reservoir holds as much as 140 trillion oceans, or more than 4,000 times more than exists in the entire Milky Way. It exists as vapour spread across hundreds of light years. While water has been found across much of the universe previously, this is interesting because of the fact this reservoir is 12 billion light years away, meaning that this water existed when the universe was only 1.6 billion years old.