2006-10-23 11:45:40 · 6 answers · asked by jennifer 1 in Science & Mathematics ➔ Astronomy & Space
The larger the aperture of the telescope (the diameter of the telescope's primary mirror or lens), the more light it can collect. Very distant galaxies are very very dim and to observe them they need to be "brightened". The more light the telescope can collect, the brighter the image appears.
So that's why large telescopes are used to study very distant galaxis.
2006-10-23 12:33:28 · answer #1 · answered by minuteblue 6 · 3⤊ 0⤋
Because those galaxies are very dim and it takes a wide mirror to collect enough light to even see them. Planets are very bright in comparison and space craft orbiting them can see more detail than any telescope on or near Earth anyway. People really over estimate how small the detail is that a telescope can see. You don't need to see really small detail if you are studying a whole galaxy.
2006-10-23 11:53:52 · answer #2 · answered by campbelp2002 7 · 2⤊ 0⤋
Is that a serious question?
Why are large microscopes used to study extremely small things?
Why do you need a large plane to carry lots of people?
Why would you need a large bag to carry lots of stuff?
2006-10-23 12:46:14 · answer #3 · answered by nick s 6 · 2⤊ 0⤋
Because the larger the diameter. of the lens to more light it collects and the better its resolution.
2006-10-23 11:53:58 · answer #4 · answered by Anonymous · 2⤊ 0⤋
because they are bigger and able to see farther into space. all the lenses in the telascope are larger,,,, so as i said,,, you can see WAY farther!
2006-10-23 13:46:05 · answer #5 · answered by Jordyn 2 · 1⤊ 0⤋
Because small ones wouldn't work........
2006-10-23 11:53:43 · answer #6 · answered by Anonymous · 2⤊ 0⤋