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Physics & Astronomy Facts

Our Sun emits light at all the different wavelengths in the electromagnetic spectrum, but it is ultraviolet waves that are responsible for causing our sunburns. This is an image of the Sun taken at an Extreme Ultraviolet wavelength.
Ultraviolet Light

Ultraviolet light is a form of radiation which is not visible to the human eye. It's in an invisible part of the 'electromagnetic spectrum'. Radiated energy, or radiation, is given off by many objects ...
The largest known volcano in the solar system, Olympus Mons.
Mount Olympus

Olympus Mons, the largest volcano in the solar system, towers a breathtaking 25 km above the surrounding plains on Mars. Until recently scientists thought that Olympus Mons and other volcanoes on the ...
Sound is just a sensation created in the human brain in response to small pressure fluctuations in the air.
The Doppler Effect

As any object moves through the air, the air near the object is disturbed. The disturbances are transmitted through the air at a distinct speed called the speed of sound, because sound itself is just ...

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