Physics and Astronomy Online

Welcome to PhysLink.com - the 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


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 ...
A speck from a comet? Displayed in a close-up under an electron microscope, this tiny bit ofcosmic dust may be our first sample of a passing comet. Less than one-tenth of a millimeter across, the particle is composed of millions ofeven tinier crystals.
It's Dusty Out There

There is no lower limit to the size of the solid particles that move around the Sun. Small asteroids grade downward into large meteoroids and then into smaller pebbles and so on down to the tiniest pa ...

The Fourth State of Matter

There are three classic states of matter: solid, liquid, and gas; however, plasma is considered by some scientists to be the fourth state of matter. The plasma state is not related to blood plasma, th ...

Science Sidebar

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