Rajaa
Hakutulokset: Hakutulos
Rajaa
yksi hakutulos.
Cosmic Chemical Evolution
sidottu,
2002,
englanti,
ISBN 9781402004483
The open cluster NGC 6791 is now considered both the oldest and the most metal-rich known. Its age is 8 -10 Gyrs, twice as old as the canonical solar-metallicity cluster M67 …