Observation Time

[suntrack2]

For skywatching how much time one can spend?
how to take the readings of the planets and stars?

2. what are the benefits of the daily telescopic observations?
3. which time is best suited to observe in the sky at night.
4. can a telescope allows to observe from underwater, if I am in swimming tank and in underwater so can I observe the sky clearly, is there any updation in technology coming in the telescope to view even from underwater?
5. How the old people were observing, is there history available at a glance, how they have created the maps in older times?
6. what is the procedure to view from the x-ray telescope, and how many x-ray telescopes are there in the world through which one can observe the sky in the night, is any disturbance gets while looking the images through such sort of telescopes?

7. is there any special viewing system to view the solar eclipse and sun and moon. can a person clearly see the moon's mountains and valleys clearly?

are there any photos of the very old telescopes and its specifications?

[farmerjumperdon]

can a telescope allows to observe from underwater, if I am in swimming tank and in underwater so can I observe the sky clearly, is there any updation in technology coming in the telescope to view even from underwater?

Why would you want to do that?

[Halcyon Dayz]

Well, there is a sort of underwater telescope (http://en.wikipedia.org/wiki/ANTARES_%28telescope%29), but it doesn't use light.
With most telescope you'd want to get as high as possible, so there will as
little as possible stuff between you and what you're looking at.

[suntrack2]

farmerJ, I am just asking. underwater telescope can also be use to locate long distance underwater objects? in daytime and in night, especially the x-ray telescope!

[Halcyon Dayz]

Electro-magnetic radiation doesn't travel well in water at all, at any wavelength.
Most deep-sea fish are blind.

Underwater you'd use sound-waves, as in SONAR (http://en.wikipedia.org/wiki/Sonar).
As whales and dolphins do.

[suntrack2]

thanks halcyon for the reply. the nature has given them the inbuilt "radar like system in their vision". only man is thing on earth who could not see well in the water, and not also clearly capable to see without telescope in the sky since the images are too long from the distance. we are only capable to see on the ground. we are bind with the limitations. we get a knowledge through it that how vast the universe is.