Physics and Astronomy Online

Welcome to - the most popular physics and astronomy online portal! We feature latest physics news and editorials, extensive science reference and constants section, education section where you can ask our experts any physics or astronomy related question. Also, don't miss our fun page and our online science store.

ScienceIQ Facts

Physics & Astronomy Facts

Stopping In Thin Air

Imagine you're going very fast -- much faster than a race car. In fact, imagine you're going 100 or 200 times faster than a race car. When you reach your destination, you need to stop relatively quick ...

The Sun, The Mighty Engine Of Our Solar System

Our Sun has inspired mythology in almost all cultures, including ancient Egyptians, Aztecs, Native Americans, and Chinese. We now know that the Sun is a huge, bright sphere of mostly ionized gas, abou ...

The Chandra Mission

NASA's Chandra X-ray Observatory, which was launched and deployed by Space Shuttle Columbia on July 23, 1999, is the most sophisticated X-ray observatory built to date. Chandra is designed to observe ...

Science Sidebar

Science Fair Projects Tips
Keeping kids interested in science
Cool summer science projects