How to catch a supernova explosion before it happens
Artist’s concept of Eta Carinae’s Great Eruption in 1843. This star underwent a great eruption but not a full-blown supernova. Is it possible to catch a supernova before it happens? Image via Hubblesite.
- How do we know if a star is about to go supernova? Some stars give no warning while others have slowly brightened or flickered before exploding.
- Not all stars erupt in a true supernova. Other stars, like Eta Carinae, have great eruptions that don’t blow themselves entirely apart.
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