Where can I get the scientific terms(glossary) about space and universe for free on the internet?

Question

For example like black holes,worm hole,M-theory and so on

Answer 1

Check out Wikipedia...

Answer 2

http://www.wikipedia.com/ there's some good information there but many don't consider it an "accredited" source. Do a search for the terms you are looking for, you'll get more than you could have ever asked for.

Answer 3

www.astronomy.com, then click on glossary on right site menu

http://www.solarviews.com/eng/terms.htm

http://cfa-www.harvard.edu/icq/ICQGlossary.html

also, type "define _____" into google where ____ is the word you want.