Tag Archives: astronomy

Why Doesn’t the Moon Fall Down?

September 14th, 2017

In this animated video segment adapted from NASA, astronomer Doris Daou explains how the forces of speed and gravity keep the Moon in a constant orbit around Earth.

Astronomy Picture of the Day

September 14th, 2017

shows daily (back to June 16 1995) a different image or photograph of the universe along with a brief explanation written by a professional astronomer.