hubble constant

The universe is about 13.8 billion years old, but how do we know that?

To calculate large, accurate calculations on a galaxy or cosmic scale, one needs an exact constant to make the landmark. It can be said that Hubble's constant is the same as Pi's

Georges Lemaitre is both a monk and a scientist. He has many contributions to science and is considered one of the greatest scientists in the 20th century.

For the first time in history, scientists have accurately measured the distance from the Earth to the nearest galaxy.