Red giant | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-03-17

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Red_giant


00:01:03 1 Characteristics
00:03:31 2 Evolution
00:08:13 2.1 Stars that do not become red giants
00:09:47 3 Planets
00:10:14 3.1 Prospects for habitability
00:11:43 3.2 Enlargement of planets
00:12:44 4 Well known examples
00:13:14 4.1 Red-giant branch
00:13:30 4.2 Red-clump giants
00:13:46 4.3 Asymptotic giant branch
00:14:02 5 The Sun as a red giant



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SUMMARY
=======
A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses (M☉)) in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous, making the radius large and the surface temperature  around 5,000 K (4,700 °C; 8,500 °F) or lower. The appearance of the red giant is from yellow-orange to red, including the spectral types K and M, but also class S stars and most carbon stars.
The most common red giants are stars on the red-giant branch (RGB) that are still fusing hydrogen into helium in a shell surrounding an inert helium core. Other red giants are the red-clump stars in the cool half of the horizontal branch, fusing helium into carbon in their cores via the triple-alpha process; and the asymptotic-giant-branch (AGB) stars with a helium burning shell outside a degenerate carbon–oxygen core, and a hydrogen burning shell just beyond that.