The Lagoon Nebula, also known as Messier 8 (M8), is a vast star-forming region in the constellation Sagittarius, approximately 4,000 light-years away from Earth.
Comet C-2017 K2 may not be visible to observers without a telescope, but it is shaping up to be the best comet of this summer!
The coma, or head, of the comet measuring almost 130,00...