Physics and Astronomy Online

Welcome to PhysLink.com - 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

An X-ray image of the Sirius star system located 8.6 light years from Earth.
Binary and Multiple Star Systems

Stars, like people, are seldom found in isolation. More than 80% of all stars are members of multiple star systems containing two or more stars. Exactly how these systems are formed is not well unders ...
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 ...

When Do We Encounter Ionizing Radiation In Our Daily Lives?

Everyone who lives on this planet is constantly exposed to naturally occurring ionizing radiation (background radiation). This has been true since the dawn of time. The average effective dose equivale ...

Science Sidebar

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