21. Such a star expands like an inflated balloon to the red giant stage. 22. Leo is also home to one bright variable star, the red giant R Leonis. 23. Red giant nucleosynthesis doesn't produce elements as heavy as potassium.24. One possible explanation was that younger galaxies contain more red giants than older galaxies. 25. The football universe is different now, filled by a red giant of a star. 26. Instead they cool along the subgiant branch until they reach the red giant branch. 27. Can some red giant be as big as Mars orbit. 28. Prominent bright red giants include Aldebaran, Arcturus, and Gamma Crucis. 29. Together with Peter Goldreich, he correctly determined that planetary nebulae evolve from red giants . 30. In the middle of a red giant is the seed of a white dwarf.
