 |
| Previous Image | Next Image |
| Description: Because a large primary mirror collects more starlight than does a smaller one, a larger telescope produces a brighter image than a smaller one, all other things being equal. The same principle applies to telescopes that collect light using an objective lens rather than a primary mirror. The two photographs of the Andromeda Galaxy were taken through telescopes with different diameters and were exposed for equal lengths of time at equal magnification. (AURA) Picture Stats: Views: 1220 Filesize: 276.66kB Height: 900 Width: 1303 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=15873 |