What was the Big Bank?

The Big Bang theory is the explanation most commonly accepted by astronomers for the origin of the universe.It proposes that the univers...

What are quasars?

The name quasar is short for quasi-stellar radio source.Quasars appear to be stars,but they have large red shifts in their spectra indic...

What is a syzygy?

A syzygy is a configuration that occur when three celestial bodies lie in a straight line,such as the sun,Earth,and moon during a solar ...