I was reading the NASA blogs and noticed that they discovered another planet recently that is very much like earth in size. It is called Glise 12b, they're very interested in that planet because it receives more light than earth but less than Venus. They could compare the 3 planets and work out why they're different. The star the planet goes around, Glise 12 is a red dwarf but it is about half as bright as the sun so you wouldn't need to be tidally locked to the star to have liquid water on the surface. They also discovered 3 galaxies that were 100% hydrogen that formed about 400 million years after the universe began to exist.
There's a lot out there.