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Wednesday, 22 April 2015

Gravity

Galileo showed in the late 16th century that light objects fell more slowly because of air resistance but the gravitational effect was the same on everything. Before that everyone believed that heavy objects fall faster than lighter ones.

This led to Issac Newton in 1687 showing that the force causing an apple to drop was the same as the force keeping the Moon in orbit around the Earth.

Astronauts can't cry in space as there's no gravity.


The  escape velocity of Deimos, one of Mars's moons, is 20km/h - meaning you could easily throw something, or even ride a bicycle off a ramp, out of its gravity

Astronauts are trained to urinate every two hours because low gravity tricks the bladder—it doesn't feel the weight of its contents.

A rocket needs to travel at 7 miles a second to escape the Earth's gravity.

Due to the earth's gravity it is impossible for mountains to be higher than 49,000 feet (15,000 meters).



Humans are unable to burp in zero gravity environments.

Large parts of Canada, particularly the Hudson Bay region, are "missing" gravity. In other words, gravity in the Hudson Bay area and surrounding regions is lower than it is in other parts of the world. The phenomenon was discovered in the 1960s and scientists are still baffled as to why.

If the force of gravity varied by more than one to the power of sixty (1 with 60 zeros after it), then stars would burn either too hot or too cold for the chemical building blocks of life too form.

Barophobia is the fear of gravity.

Source Daily Express

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