On this day in 1989 – November 18th – NASA's Cosmic Background Explorer (COBE) was launched.

COBE was a cosmology satellite that investigated the cosmic microwave background radiation (CMB). It provided key pieces of evidence that supported the Big Bang theory of the Universe.


Mona Evans
For news, activities, pictures and more, sign up to the Astronomy Newsletter!

http://www.bellaonline.com/newsletter/astronomy