[4097] Physics 316: Extragalactic Astronomy and Cosmology
(Summary of Lectures)
Detection of 12-13 Gyr Old WDs
| Recent HST observations of the Globular cluster M4 |
[Image Credit: HST]
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Detection of cool (and hence old)
White Dwarfs.
Age estimates are 12-13 Gyr Assuming 1 Gyr to reach the White Dwarf phase of stellar evolution places the age of the universe in the range 12-13 Gyr The old WDs are the extremely faint stars. |
[Image Credit: HST]
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