Earth and our entire Milky Way galaxy may sit inside a mysterious giant hole which makes the cosmos expand faster here than ...

Particular stars called Cepheid variables allow astronomers to determine distance, and Hubble spotted one of these within M31 ...

Planetariums were a hit with the public. Within decades, they had spread around the world – the first planetarium in the United States opened in Chicago in 1930, while the first one in Asia opened in ...