- Year Discovered: 1572
- Location: Cassiopeia Constellation
When stars end up dying off, it can happen in a variety of ways. Many will go into a supernova where they explode and that stardust spreads out across the universe. Others just slowly dim until they die off while others will have energy slowly suck away from them until they just become nothing. Regardless, you expect that once a star dies off, it will remain dead and you’ll never see it again. Right? RIGHT?!? Introducing Tycho, the once white dwarf star.
Although some assume it was remnants of an exploding supernova. Somehow, Tycho gathered up a lot of mass from another nearby star and managed to explode yet again. When this happens, astronomers call it a Type Ia supernova. Basically, Tycho had already died after it exploded. But those remnants and what not came back together to reform the star, allowing it to live again. Only to die once more. It was originally discovered in 1572, but NASA then came across it after the second supernova.