Documents Samuel was a French explorer. He was looking for the Northwest Passage in Canada.

Samuel was a French explorer. He was looking for the Northwest Passage in Canada. Thomas Jefferson was the main author of the Declaration of Independence. When Jefferson…

Documents the known universe

The Know Universe âSpace is big, Really big. You just won't believe how vastly, hugely, mindbogglingly big it is. I mean, you may think itâs a long way down the road…

Documents Kennicutt (1992) Galaxies are shown in order of increasing Hubble type from top to bottom....

Kennicutt (1992) Galaxies are shown in order of increasing Hubble type from top to bottom. Continuum: sharp break and rise after H and K lines (hence brighter in red than…