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10 votes
1 answer
468 views

What do the acronyms in "AT 2017 gfo" mean?

About 11 hours after the detection of GW170817 by Ligo/Virgo and the quickly succeeding detected GRB170817, a transient afterglow in the optical-nIR frequency appeared which showed many signs of r-...
Arturo don Juan's user avatar
2 votes
2 answers
172 views

What does the word "compact" mean in astronomy/astrophysics?

I have seen countless times the adjective "compact" in astronomy, e.g. compact stars, compact binaries, etc. I would like to know, what exactly is this supposed to mean? From this source, I am led to ...
Arturo don Juan's user avatar