5 ms·
We'd see it coming long before. They emit radiation at many frequencies, plus all the stars orbiting them (ie, a galaxy) indicate the mass of what they're orbit
by imglorp 11y ago
We'd see it coming long before. They emit radiation at many frequencies, plus all the stars orbiting them (ie, a galaxy) indicate the mass of what they're orbiting. So if you happen to see any galaxies coming towards us in the next billion years (aside from Andromeda) do let the world know.
- jfoster 11y agoAre there any risks associated with them? For instance, a burst of radiation that obliterates us? Is that possible?
- ianlevesque 11y agoNo, but definitely don't look up gamma ray bursts.