Hubble Parameter

Basic cosmology This discussion will cover basic geometry of the cosmos. I will cover expanding space, Hubble law, three possible versions of the Big Bang Theory from two points of […]

Triffid Nebula M20

This nebula was discovered by Charles Messier in 1764. It is a combination of an open cluster and emission nebula. The name means “divided into three lobes”. In the center […]

Whirlpool Galaxy M51

Whirlpool Galaxy Also known as M51a and NGC5194. The smaller galaxy in the lower right is a companion galaxy known as NGC5195 or M51b. First discovered by Charles Messier in […]