Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. The above Keyhole Nebula results from dying star Eta Carinae 's violently casting off dust and gas during its final centuries. Eta Carinae is many times more massive than our own Sun , and should eventually undergo a tremendous supernova explosion. Eta Carinae emits much light in colors outside the human visible range. This, along with a previously hypothesized 5.52 year period , indicates that the dying star might be part of a multiple star system.
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