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- Thu Mar 28, 2019 8:09 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Gaia Stars of M15 (2019 Mar 28)
- Replies: 25
- Views: 15843
Re: APOD: The Gaia Stars of M15 (2019 Mar 28)
This is a brilliant post, thank you for sharing. I found a small typo, so here is my contribution: the prominent property of RR Lyrae is the relation between period and luminosity - not brightness. Brightness and luminosity are related by distance, so the importance of RR Lyrae is that we measure a ...