The first time a human first looked up into the night sky. This date is Unknown. In addition the SUN is a star and that may count as well.
Galileo
orion the hunter was first found when the greeks first applied this group of stars and named them orion.
The fossils were first found in 1983
HYDROGEN IS THE GAS FOUND IN STARS. ----
All elements heavier than iron which are found on earth were created when these stars went exploded as novae.
1998
not sure
1818
The fact that the halo and bulge are made exclusively of old stars mean that those parts of the galaxy formed first and are filled with old stars
the state of matter found in stars is plasma.
Lithium was found (i.e. first chemically identified as a distinct element) in the year 1817.
it was found in souther china