Kepler’s Supernova with all three
of NASA’s Great Observatories
Just 400 years ago:
(Oct. 9, 1604)
Then a bright, naked eye
object (no telescopes)
It’s still blowing up – now
14 light years wide and
expanding at 4 million mph.
There’s material there at
MANY temperatures, so
many wavelengths are
needed to understand it.