Astronomical Constants from NASA - http://www.ksc.nasa.gov/facts/faq04.html
Contains astronomical/space constants and equations. |
Beta-Theta - http://www.beta-theta.com/
Gives general defintions, background and examples from the science fields of biology, physics, chemistry, math, and history. Includes forum boards. |
DOE Community - http://www.osti.gov/doecommunity/
Searchable database for reports that are generated by federally funded projects. |
Physics and Science Reference by PhysLINK.com - http://www.physlink.com/Reference/Index.cfm
Includes physical constants, online unit conversions, periodic table of elements, exact time, fundamental physical formulae and equations. |
RefScout - http://www.refscout.com/
A weekly, scientific reference mailing service. |