6 links
Ask a Rocket Scientist
aerospaceweb.org
Explains design, technology, aerodynamics, history, space travel, and other topics related to aerospace engineering.
Curious about Astronomy? Ask an Astronomer!
curious.astro.cornell.edu
Browse archives of previous questions and answers, or submit a question to be answered by astronomers at Cornell University.
Physlink - Ask Experts Physics and Astronomy Questions
physlink.com
Ask questions and check out the archives, organized by topic.
ScienceNet
sciencenet.org.uk
A free science information service, staffed by scientists who are expert in explaining complex topics in everyday language. Search the online database of previously answered questi…