Can you see stars in other galaxies?

[saac]

On 09/11/2017 at 22:34, michael8554 said:

You measure the distance to nearby Cepheids in the Milky Way and Magellanics by parallax and other methods, and measure their apparent brightness and period of their variability.

There's a relationship between Cepheid absolute brightness and the period of the variability, discovered by a computer at Harvard aka a clever young women in the early 1900's.

So knowing the period and apparent brightness of Hubble's Cepheid you can calculate it's absolute brightness. Then its distance is how far away must it be to have this apparent brightness.

Something like that.......

Michael

Henrietta Leavitt, it's a great shame that she didn't get the credit she was due. Much like the Jocelyn Bell of here time.

 

Jim