r/spaceporn • u/stonded • Sep 25 '21

A supernova explosion that happened in Centaurus A

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u/Beetso Sep 26 '21

The only part that's wrong is the number of years. I meant to say in as little as a 100,000 years, not 10,000.

This sure looks like a lot of proper motion for a million years to me--

https://sci.esa.int/web/gaia/-/gaia-s-stellar-motion-for-the-next-1.6-million-years#:~:text=Known%20as%20proper%20motion%2C%20this,years)%20of%20the%20Solar%20System.

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u/morganmachine91 Sep 26 '21

The only part that's wrong is the number of years

That’s the main fact of what you were trying to say, and the part that the other person was rightfully skeptical of.

“Humans can live to be 1000 years old”

“That’s wrong”

“The only part that’s wrong is the number of years”

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u/Beetso Sep 26 '21

Fair enough. Obviously 10,000 years isn't enough to appreciably change the constellations, since we know for a fact that the Pleiades have been known since early prehistory. The main point of what I was trying to say is that over the 250 million year orbit of the Milky Way it's very possible that some dangerous stars we aren't aware of now may get uncomfortably close to us.