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Physics & Astronomy Facts

This original 1930 cloud-chamber photograph by Carl Anderson shows the track of a positively charged particle (thin track curving to the left) of electronic mass slowed down by passing upward through a lead plate (horizontal thick line).
Antimatter Discovery

In almost every science fiction movie ever made, you are bound to hear about antimatter –– matter-antimatter propulsion drives, whole galaxies made of antimatter, and so on. Antimatter has been used ...
An uneven distribution of mass inside the Earth. The Earth
Amazing GRACE

Gravity has an effect on everyone and everything on Earth. Although we can't see it, smell it, taste it or touch it, we know it's there. Although scientists already know quite a bit about this invisib ...

Mercury

The small and rocky planet Mercury is the closest planet to the Sun; it speeds around the Sun in a wildly elliptical (non-circular) orbit that takes it as close as 47 million km and as far as 70 milli ...

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