Physics and Astronomy Online

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Physics & Astronomy Facts

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 ...
The Mars Climate Orbiter
The Devil's In The Details

Did you ever make a mistake converting English numbers to metric numbers? Let's hope that your mistake didn't cost anyone $125 million dollars. That's what happened to NASA. The Mars Climate Orbiter's ...
An artist
Not Quite A Planet

Astronomers have dubbed it 'Quaoar' (pronounced kwa-whar) after a Native American god. It lies a billion kilometers beyond Pluto and moves around the Sun every 288 years in a near-perfect circle. Unti ...

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