Located at 25000ly away, the event reached Earth 110-140 years ago.
If the second statement is true, than the Crab would nebula, located 6500ly away, actually would be a younger event, as it was recorded in 1054.
Cassiopeia A is still the youngest Nova is 11K ly away.
Can someone please corroborate these assumptions?
The Crab Nebula is currently:
420″ × 290" or 7 arcmin across (11ly moving at 0.5c in 900 years!)
Now G1.9+03 is 2.5 arcmin across, at 25K light years, that's a huge size! In 140 years!!!!
Can someone please explain this, as it doesn't seem to make physical sense.
Which leads to third question:
If a Galaxy like the Milky Way has an Supernova once every 100 years. We are due for a fair amount of events during the past 1000 years.
Does anyone know of more events in the past 1000 years?
They will be interesting to watch, if they occur in our lifetime!
Will Eta Carinae be one of them?
Edited by Gvs, 30 September 2019 - 03:41 PM.