could a reflector telescope be used for viewing other thigs on earth like birds?
954394
Newtonian reflectors are difficult to use for terrestrial observation because the image is inverted. Cassegrain-type reflectors (Schmidt-Cassegrain, Maksutov-Cassegrain, etc.) can be used with erecting prisms, or with a star diagonal if you're willing to put up with a mirror image view. The main problem with the Cassegranian reflectors is that their focal lengths are usually so long that you can't go lower than 40 or 50 power with them. Terrestrial spotting scopes are  most often used in the 20x to 40x range.
1047988
Not that I know of. If there were, I'm sure it would cost a lot to do it. There is, however, a way you can look at the earth from above and see it as a snapshot! (Snapshots taken from satellites!)\n\nEarth.Google.com\n\nYou do have to download a free program and install it, but I spent about two weeks of my spare time looking at places I've never been, or haven't been in a long time. Places like the Eiffel Tower, Grand Canyon, Mt. Rushmore. I also went places I go all the time, like my house. I noticed the picture was taken years ago because it showed construction going on that has been completed a while.\n\nIt's fun, but sorry it's not streaming video. It's not even that up to date, but you can go see things that don't change much!
823026
Being so far away, telescopes don't have the resolution needed to see the equipment. It's a bit like trying to use Google Earth and figuring out what the make and model of each car is. We can see the area of the moon where they touched down, but the equipment is just too small.\n\nBeing so far away, the light reflected off the metal facets of the hardware will rarely be reflected at just the right angle to be seen. The moon orbits Earth at a 5 degree inclination. Plus, the landers aren't at the moon's equator, which complicates things even more. The equipment will need to be at the right place at the right time, and our telescopes will need to be looking in the right place at the right time, just for a chance flash of something. It's a lot of variables that almost never come together right.
190587
Refraction bent the light when passing in angle throught glass or other material, it can be use in a optical telescope. But the lens used must become thicker when diameter grow, and that make bigger lens really expensive.\n\nreflection can also be use to build telescope. Big mirror can be build at lower cost than lens.
370841
The telescope has a built-in computer to find and track objects in the sky. There are ports for other Meade modules, but not for hooking the telescope up to another computer, as far as I could tell from a quick read through of the manual. If you don't have the manual: http://www.meade.com/manuals/TelescopeManuals/LXseries/LX90-LNT.pdf#search='LX90%20telescope'\n\nIf you were expecting to see stars on your computer, you did not read much about this telescope before you bought or got it.
137376
Yes. Using the parallax method to measure the distance to stars is only useful to about 100 pc. To measure greater distances spectroscopic techniques are used.
27624
go to http://www.birds.cornell.edu/programs/AllAboutBirds/BirdGuide/
255650
Yes.  Or at least it can by using deep level optical spectroscopy (DLOS).  See the reference below:
879967
if you have a good enough telescope - you can see some stuff.\nyou can also see the robotic tractor that was left on Mars. (though you need more than a standard telescope for that)\nIt has been done by many people
110405
I love to shoot starlings and house sparrows with mine. They are both introduced species and a plegue on other birds. If we had a government had half a backbone they would eliminate them all by putting a $1.00 a head on each one. And I would become a millionare within a year.
1185066
They are actually increasing their range of vision by tilting their eyes toward the ground. Birds supposedly are extrasensory feelers, so they probably "sense" worms.
326080
we have a hubble telescope. its actually a giant satellite that orbits in space. takes pictures. and sends them to computers on earth! neato!\n\nbut an intersting thing is, the pictures we get of other galaxies are what they looked like millions of years ago! thats because it takes millions of years for light to travel from THAT galaxy to THIS galaxy. :)
178295
i did a small unit in animal behaviour and physiology and from what i remember .. birds have a much narrower vision (acuity of vision) which enables them to detect preys for examples from large distances while flying .. thats all i know, it not ... mm .. that informative.. but i hope it helped .. lol
900039
A dobsonian telescope will give you the most telescope for your money. These are Newtonian reflectors on simple alt-azimuth (tilt & swivel) mounts. Get as much aperture as you can afford and handle. More aperture means being able to see fainter objects and finer detail. Many people find an 8" scope a good choice.\n\nOrion Telescope & Binoculars has some good beginner dobs. Zhumell is another brand with good values in this area.
1018864
You can purchase a Tasco 4.5 inch reflector telescope that comes with eyepieces that give magnifications of 50x 100x and 200x. \n\nTasco however is not known for great optics. They are better know for cheap optics. \n\nYou did not mention what you wanted to use the telescope for. \n\nFor a decent spotting scope, select a Celestron Ultima 100 mm. \n\nAnd do not scimp on the tripod. \n\nFor a top of the line spotting scope, select a Swarovski. The best of the best. \n\nFor astronomical viewing you want something a tad larger. An 8 inch reflector.  \n\nCheck out the link to this one.
667504
Yes you can see them -- as other have pointed out they are seen as object that moves across from sky in a matter of a minute of so -- far faster and completely steady unlike an air plane -- once you have seen one you will know.\n\nThey are best seen just after sun set (or just before sun rise) where it is dark at ground level but due to the curvature of the earth still sun light 100 mile above.   At this point you can clearly see the stateliest as the passes though sun light and become bright as a star.\n\nThe link below will search (click on the SkySearch) though a database of ~300 satellites which are easy to see, and give you a time for when you can see them locally.\n\nMake sure that you 1) provide the accurate information of where you are going to be looking, as a few miles does make a difference to both whether you can see them but also to the time, and 2) make sure you have a clock which is right to the second as that helps you look for the right thing.
743557
No.  The only way you could do something kind of like that would be to leave earth travelling at faster than the speed of light (which is impossible as far as we know) and then get to  an observation point that is receiving light from earth (that you beat there) from the past time on earth that you want to observe.\n\nIt's really not worth the effort cause you already know what happened and you wouldn't have sound.  It would be like watching a silent movie without a piano player in the background.  *yawn*