Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t ...

Astronomers discovered cosmic microwave background radiation in ... spread thinly across the whole Universe. More distant galaxies have greater red-shift. This indicates that more distant galaxies ...

In 1927 Georges Lemaître proposed that the Universe began with an explosion called the Big Bang. Hubble’s research into the red shift of galaxy light showed that the Universe was expanding ...