Hot answers tagged amateur-observing
Well, at least you did some thinking and proposed a couple of personal thoughts instead of just asking for the answer to a homework question. Both observations you make are pertinent. Remember, a celestial sphere doesn't actually exist. It is an imaginary concept, a simplification based upon our perspective of the universe. A planetarium, whether it is an ...
This experiment is still done frequently, but you need a powerful pulsed laser, precise pointing (error below about 20 arc seconds) and a sensitive detector. Amateurs will fail most likely, because they won't get access to an appropriate equipment. Here is a youtube video, which may give an impression of how difficult it is to perform the experiment.
If you are asking 'Why is Mars so small in my Field of View, I thought it would be larger' then you need to consider how big you can expect to see it for various eyepieces. Right now (2014 03 06) Mars is approx 12.6 arcsec in apparent size. It can be as big as 25 arcsec, and as small as 3 arcsec. (Why the variation? We orbit the sun at a different rate to ...
You're experiencing a few issues all of which have one solution. Take the Scope outside. Let it acclimate to the ambient air tempurature, and then try looking. The 1st issue is the mirror needs to be the same temp as the air you're observing in. Since you are indoors you have a very warm optical path this causes distortion and trouble focusing. 2: Because ...
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