Education Solar system & planets

WELCOME The Universe, Solar System, and Planets I Questions: How do we know the Big Bang happened? How do we know the Universe is expanding? What is the timeframe of Universe…

Documents Hubble’s Law

Hubbleâs Law Hubble was an American astronomer, born in Missouri. In the 1920âs Hubble discovered a relationship between recessional velocities of galaxies and the distances…