Why Is This Number The Greatest Unsolved Problem In Astronomy?
In the 1920s, Edwin Hubble made an important observation. He noticed that the farther a galaxy is in deep space, the faster it is moving...
In the 1920s, Edwin Hubble made an important observation. He noticed that the farther a galaxy is in deep space, the faster it is moving...
NASA’s Juno probe is coming to the end of a fantastic mission, but it’s still got some tricks up its sleeve yet.