Useful Links
Here are some interesting links which you can use
Google Sky
Just like Google Maps, but of the sky. You can see images in nearly all ranges of light frequency and search for objects.
World Wide Telescope by MicroSoft
Its just like Google sky. You can view it in the browser or can also download a PC Client for Windows.
NASA
Requires no introduction. Provides information about anything you can think on in Astronomy.
Sky and Telescope
Apart from giving periodicals on news and events it provides invaluable tips on imaging and also displays latest astronomical kits.
Students for the exploration and development of space
Very rich site providing information solar system, constellations and also deep space bodies like Messier objects and NGC catalog.
American Association of Amateur Astronomers
This is very rich site providing information about facts and data pages. It has also got very rich CCD image gallery.
Space Telescope Science Institute
This site reveals information about Hubble Space Telescope(HST) and Next Generation Space Telescope(NGST). It has got a wealthy collection of deep space images taken by HST.
Astronomy Magazine
A popular site publishing weekly news about recent events in astronomy, introduction to various aspects of astronomy and much more.
Kepler: Search for habitable planets
This site contains information on Kepler mission by NASA to find habitable planets outside solar system and displays information about planets discovered by it.
Star Mythology
Many amateur specially beginners find the mythology behind the constellations much more amusing than anything else in practical astronomy. This site solves their purpose to a very great extent.
European Space Agency
Nice collection of articles and news. The glossary might also prove very useful to you.
Heavens Above
This site provides data on present location of major artificial satellites like ISS, HST, predict their viewing times. Also shows information on visible comets etc.
Also, here are links to astronomy clubs in other IIT's