Supernovae

Kepler's Supernova Remnant

The explosion was first observed on October 9, 1604. Johannes Kepler began observing it on October 17. When the star exploded, it could be seen wit

Cassiopeia A: An Exploded Star

Cassiopeia A is an exploded star in the Cassiopeia constellation. It is the brightest astronomical radio-wave source in the sky, which means the pre-existing star was a very massive object.

Supernova Remnant Menagerie

Location Let's elaborate on the exact location. Our Milky Way galaxy is orbited by a satellite galaxy called the

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