Top Posters
Since Sunday
z
4
n
4
t
4
k
3
x
3
r
3
m
3
j
3
c
3
l
3
e
3
s
2
New Topic  
gisellerol gisellerol
wrote...
Posts: 169
Rep: 0 0
3 months ago

What allowed Henrietta Levitt to conclude that the pulsation period of Cepheid variables was related to their intrinsic brightness?



Stars that are farther away appear dimmer.



All Cepheid variables have the same luminosity.



The stars in the Small Magellanic Cloud are nearly the same distance away.



Her stellar models predicted the behaviour of stars in the instability strip.

Textbook 
ASTRO

ASTRO


Edition: 3rd
Authors:
Read 37 times
1 Reply
Replies
Answer verified by a subject expert
collegestudent1collegestudent1
wrote...
Posts: 133
Rep: 0 0
3 months ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

gisellerol Author
wrote...

3 months ago
Just got PERFECT on my quiz
wrote...

Yesterday
You make an excellent tutor!
wrote...

2 hours ago
Brilliant
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  537 People Browsing
Related Images
  
 382
  
 176
  
 1590
Your Opinion
Which country would you like to visit for its food?
Votes: 262

Previous poll results: Do you believe in global warming?