American John Jurist Lowell

Supernovae

A supernova is a huge stellar explosion involving the entire star. The supernovae that mark the death throes of massive stars, Type II supernovae, play a crucial role in forming the atoms in our bodies. At their peak brightness, supernovae can outshine the entire galaxy containing them. They emit as much energy as the Sun does in its 10 billion year lifetime. Although they are common on cosmic time scales, supernovae in our own galaxy are rare on human time scales.

Crab Nebula

Observing the Crab Nebula requires a telescope and a dark moonless night. In a modest telescope it looks like a barely visible fuzzy patch near the naked eye star, Zeta Tauri. John Bevis, a British physician and amateur astronomer, first discovered it in 1731.

On September 12, 1758 Charles Messier independently rediscovered the Crab Nebula. As the first object in Messier's famous catalog, it is also known as M1. It is among the most studied objects in the sky.

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