Astronomy

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Astronomy Definitions and Factiods

Astronomy Definitions 4

Big Bang

According to Einstein's General Theory of Relativity, the expanding universe originated from a singular point in space. This explosive event (about 13 billion years ago) was dubbed the Big Bang by the skeptical British Astrophysicist, Fred Hoyle, and the name stuck. Hoyle was an advocate of the steady state universe, but that theory has very few advocates today. Evidence for the Big Bang is overwhelming.

Blue Moon

For one thing, most blue moons aren't really blue! There are two types: those that are and those that are not. Originally, this expression meant something that would hardly ever happen, as in "We will have a blue moon, before such and so...." Then it became the name for the third full moon in a season (three months) of four full moons. Then about 50 years ago it became the name of the second full moon in a month, as Mar. 31, 1999. They are not very rare. They happen every two or three years. The other kind, when the moon really is blue, is a bit more rare. See Blue Sun for an explanatioin of the color.