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After a massive star well beyond the size of our sun collapsed exploded, remnants of the star were hurled into space. Over a period of time, the material began to cluster together to form brilliant spirals of colorful debris. All that is left of the original star are these bright clusters of star-dust and a small neutron star at the center of the cloud cluster.

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The light from Cassiopeia first reach Earth about 300-350 years ago, sometime in the mid to late 1600s. With this estimate, that would make Cassiopeia A the youngest supernova remnant in the Milky Way Galaxy

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Because Cassiopeia A is the strongest source of radio emissions outside of our solar system, a far amount of research has gone into it

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Because of the strong radio waves, Cassiopeia A was the subject of many early astronomers' research into the sources of EMS radiation in space

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It is surprising to learn that the stunning pictures of Cas A are not actually how it looks in reality. Many of the pictures use false color to represent invisible waves, such a radio waves and x-rays. In reality, Cassiopeia A is nearly invisible to the naked eye

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0:45 seconds

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Time Lapse Movie of the Cassiopeia A Supernova Remnant

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Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.

# data[].attributes.attachment_link.description
Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.