The Night Sky - How Henrietta Leavitt Changed Our Understanding Of The Universe

Henrietta Swan Leavitt was an American astronomer who worked at the Harvard College Observatory as a "computer". During her career she discovered 2,400 variable stars and the discovered ways to measure the luminosity of those stars. In "The Night Sky" Darrell Heath shares the how her discoveries changed the way we view the universe.

[@mdhbigdog]

Thank you for recommending the book, "The Glass Universe," by Dave Sobel. I'm reading it now. Excellent history of astronomy.

[@krsNAMEK]

This is the best explanation of the concept!!

[@ayaanalvin7260]

I dont mean to be so offtopic but does any of you know a way to get back into an instagram account??
I somehow lost my login password. I appreciate any assistance you can offer me

[@benjaminsantana8629]

@Ayaan Alvin Instablaster =)

[@ayaanalvin7260]

@Benjamin Santana Thanks for your reply. I got to the site thru google and Im trying it out atm.
I see it takes quite some time so I will reply here later when my account password hopefully is recovered.

[@ayaanalvin7260]

@Benjamin Santana It worked and I finally got access to my account again. Im so happy!
Thank you so much you really help me out!

[@benjaminsantana8629]

@Ayaan Alvin no problem :D

[@ZerinZarinZerin]

Great video about to understand distance. Tribute to the lady for her magnificent discovery.

[@angonsframes]

truly yes

[@joaquinfabrega]

Historical fact: Hubble never used the word galaxy, he always used nebulae.

[@theccpisaparasite8813]

At about 6:15 you make a rather monstrous error. Cepheids become _brighter_ as they expand due to reduced shell opacity and expanded overall surface opacity and they become dimmer due to increasing shell opacity. Granted it is a bit more complicated than that but, the concept is bigger, brighter. Smaller, dimmer. Henrietta made a good catch on this one.