Top Posters
Since Sunday
L
3
d
3
y
3
a
3
n
3
d
3
e
3
d
3
c
3
p
3
M
3
a
3
Home Q & A Board Science-Related Homework Help Physics
New Topic  
doit_the_clown doit_the_clown
wrote...
Go to Answer
Posts: 1408
Rep: 0 0
7 years ago
What useful purpose did variable stars serve for Harlow Shapley in locating the galactic center?
A)   They are important spiral arm tracers and thus defined the shape of the Galaxy.
B)   Their brightness variations allowed accurate distances to be measured.
C)   They emit copious amounts of infrared radiation and are thus visible through interstellar dust that obscures visible light.
D)   They are concentrated in the galactic center and so defined its direction.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
Read 94 times
1 Reply
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
Replies
Answer verified by a subject expert
discovererdiscoverer
wrote...
#1
Top Poster
Posts: 1374
Rep: 30 0
7 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

doit_the_clown Author
wrote...

7 years ago
Thanks
joyceess
wrote...

Yesterday
Brilliant ツ
Mkersey12
wrote...

2 hours ago
Thank you, thank you, thank you!
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1022 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 498
  
 873
  
 659
Your Opinion
Who's your favorite biologist?
Votes: 587
Previous poll results: Do you believe in global warming?