Telescope mirrors

  • #1
141
6
A telescopes sensitivity, or how much detail it can see is directly related to the size of the mirror area that collects light from the objects being observed. So a bigger mirror means higher resolution so you can see more detail at greater distances right? does it also mean it can collect more light so it will be able to see dimmer stars that wouldn't usually be able to be seen??
 

Answers and Replies

  • #2
davenn
Science Advisor
Gold Member
2021 Award
9,599
8,775
So a bigger mirror means higher resolution so you can see more detail at greater distances right?

yes

does it also mean it can collect more light so it will be able to see dimmer stars that wouldn't usually be able to be seen??

and again yes, tho regardless of the size of the scope, it will still have a limiting magnitude for that particular size
 
  • #3
davenn
Science Advisor
Gold Member
2021 Award
9,599
8,775
tho regardless of the size of the scope, it will still have a limiting magnitude for that particular size

for example my 9.25 inch mirror scope has a limiting magnitude of M 14.4
one link on the www told ne that for the Hubble Space Telescope is about M 28


Dave
 
  • #4
543
147
does it also mean it can collect more light so it will be able to see dimmer stars that wouldn't usually be able to be seen??

If you are talking just about stars, then yes, the size of the mirror is the limiting factor. If you are talking about extended objects (nebula, planets) then the f/number is the important parameter.
 

Related Threads on Telescope mirrors

  • Last Post
Replies
2
Views
1K
Replies
2
Views
8K
Replies
3
Views
917
Replies
3
Views
958
  • Last Post
Replies
16
Views
1K
  • Last Post
Replies
9
Views
3K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
7
Views
2K
Top