also can known blackholes be seen from earth?
2006-12-29 09:00:12 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
The principal is the same for any telescope. The larger the aperture of the telescope (the diameter of it's lens or primary mirror), the more light it can collect, the more you can see, and the higher magnification you can use.
High magnification is typically avoided by astronomers, but planetary viewing is one of those exceptions. To see a considerable amouunt of detail on planets, you need to use fairly high magnification. This means you need a telescope large enough to be able to handle the magnification. The highest practical magnification that can be used in a telescope is generally arrived at by multiplying 50 per inch of aperture of the telescope.
Not only that, but to get a good long look, you need a stable mount, a well cooled telescope, and very calm seeing conditions. Under high magnification the object will move out of view very fast because the Earth's rotation becomes very apparent so it helps to have a mount that can track well.
Generally, if you JUST want to do lunar and planetary viewing, an apochromatic refractor would do nicely. The problem is an 80mm apochromatic refractor will cost around $500 not including the mount and that's really too small to be gratifying unless you want to take pictures and look at things later.
The smallest telescope you should buy would be one with 4.5" of aperture so it will probably be a reflector. With 4.5" of aperture and the right eyepiece you will be able to see the rings around Saturn, some detail on Mars if the conditions here and there are good, and hints of stripes on Juptier, as well as it's moon.
The larger the telescope is in aperture, the more detail you will be able to see, so you should really get something larger than 4.5".
You will not be able to see a black hole. All photos of black holes aren't actually the holes themselves but the super energetic material in the accretion disk around the black hole, and to even see that they typically use telescopes that see in x-rays or other wavelengths that aren't visible to optical telescopes.
2006-12-29 13:45:30 · answer #1 · answered by minuteblue 6 · 0⤊ 0⤋
You can get a cheapie from Walmart that will show you fairly good pics of the moon and planets. You also can get a good pair of binoculars. Or you can spend a few hundred dollars and more for a quality telescope made by Meade or Celestron to get excellent pics. No, we cannot see black holes....they suck light, you know.
2006-12-29 09:09:12 · answer #2 · answered by Anonymous · 0⤊ 0⤋
A $60 60mm refractor from Walmart will be a good start. If you get into it, $300 will buy you a 4.5" reflector with a motor drive to track the sky.
2006-12-29 12:59:18 · answer #3 · answered by Nomadd 7 · 0⤊ 0⤋
Hi. Try and find a decent Newtonian telescope. They have a mirror that collects more light and they are simple to operate.
2006-12-29 09:37:02 · answer #4 · answered by Cirric 7 · 0⤊ 0⤋
You cannot see black holes, but see the sources for some good telescopes.
2006-12-29 09:11:45 · answer #5 · answered by campbelp2002 7 · 0⤊ 0⤋
I bought a telescope but can't get on with it as I am a specs wearer. Do you want to buy mine? Not joking! Please email me if you are interested and I will give you details. UK only.
2006-12-29 09:08:06 · answer #6 · answered by Ladyfromdrum 5 · 0⤊ 0⤋
yeah u maybe can log on to telescope.com for more infomation
2006-12-29 09:47:26 · answer #7 · answered by rachit t 2 · 0⤊ 0⤋
ask santa for next year
2006-12-29 11:26:27 · answer #8 · answered by Clint 6 · 0⤊ 0⤋