Astronomy and Astrophysics Forum

Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
  • Sticky
  • Last Post
29
Replies
723
Views
87K
  • Sticky
  • Last Post
10
Replies
225
Views
20K
  • Redirect
  • Sticky
  • Last Post
Replies
Views
Replies
142
Views
113K
  • Sticky
  • Last Post
Replies
3
Views
8K
Replies
3
Views
80
Replies
22
Views
724
Replies
2
Views
146
Replies
2
Views
178
Replies
22
Views
387
Replies
43
Views
887
Replies
3
Views
194
  • Last Post
Replies
24
Views
275
  • Last Post
Replies
2
Views
214
Replies
41
Views
2K
Replies
16
Views
448
Replies
22
Views
2K
Replies
5
Views
238
  • Last Post
Replies
4
Views
209
Replies
1
Views
188
  • Last Post
Replies
2
Views
168
Replies
9
Views
343
Replies
62
Views
7K
  • Last Post
Replies
5
Views
231
Replies
9
Views
413
Replies
4
Views
283
  • Last Post
Replies
3
Views
343
  • Last Post
Replies
6
Views
455
  • Last Post
Replies
12
Views
326
Replies
1
Views
253
  • Last Post
Replies
14
Views
359
Replies
23
Views
505
Replies
4
Views
380
Replies
8
Views
371
Replies
3
Views
295
Replies
3
Views
383
Replies
1
Views
215
Replies
30
Views
911
Replies
14
Views
319
  • Last Post
Replies
10
Views
455
  • Last Post
Replies
6
Views
300
  • Last Post
Replies
2
Views
1K
Replies
10
Views
944
Replies
2
Views
360
Replies
7
Views
2K
  • Last Post
Replies
12
Views
428
  • Last Post
2
Replies
42
Views
5K
  • Last Post
Replies
18
Views
592
Replies
13
Views
344
Replies
4
Views
311
Replies
4
Views
335
Replies
7
Views
497
Replies
4
Views
385
Replies
53
Views
7K
  • Last Post
Replies
7
Views
427
  • Last Post
Replies
7
Views
1K
Replies
20
Views
1K
  • Last Post
Replies
3
Views
348
Replies
35
Views
3K
Replies
2
Views
766
Replies
13
Views
1K
Replies
12
Views
2K
Replies
9
Views
966
Replies
7
Views
777
Replies
15
Views
3K
  • Last Post
Replies
9
Views
2K
Replies
21
Views
1K
Replies
13
Views
1K
Replies
4
Views
1K
  • Last Post
Replies
11
Views
1K
Replies
6
Views
1K
Replies
2
Views
664
Replies
2
Views
780
Replies
2
Views
648

Astronomy

Astronomy generally refers to the act of observing things (be that stars, galaxies or whatever) which, coupled with astrophysics, aims to understand those things for their own sake. The aim is to learn about the stars, galaxies or planets etc.

Astronomy, both observational and theoretical (and now also experimental!) is about what is going on in the universe that we can see now, or extrapolate to short times (~a billion years) in the past or future.
Top