× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
z
4
n
4
t
4
k
3
x
3
r
3
m
3
j
3
c
3
l
3
e
3
Home Q & A Board Science-Related Homework Help Physics Astronomy
New Topic  
James89 James89
wrote...
Posts: 314
Rep: 1 0
5 years ago
The coolest white-dwarf:  Surveys have been carried out to identify isolated white-dwarfs throughout the galaxy and its globular clusters. They have been found to span a range of temperatures, with a sharp lower limit of about 3000 K (i.e. many have been found at all temperatures from 10s of thousands of Kelvin down to 3000K, but none cooler).  What does this observation reveal about the age of our galaxy?
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
Authors:
Read 94 times
1 Reply

Related Topics

Replies
wrote...
#1
5 years ago
 The galaxy has a finite age, when enough gas must have become present to generate stars which could go on to become white dwarfs. (This observation is one of the supporting pieces of evidence for the approximately 13 billion year age of the universe  the coolest observed white dwarfs are about 10 billion years old)
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  685 People Browsing
 107 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 182
  
 13551
  
 724