What happens if you take a compass to space?

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asked Jan 24 in Science by noahpaul (710 points)
What happens if you take a compass to space?

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answered Jan 25 by 1982tiperman (5,590 points)
When you take a compass to space it will still work but the compass magnet will be weaker in space.

Compasses work using magnetic fields and as you leave the Earth and move into space the magnetic field will become weaker.

Even though the field is weaker, the compass can still align with it meaning that a compass on the International Space Station would still be a reliable guide to the North Pole.

As of now there are 3,000 dead satellites in space.

There are more than 3,000 dead satellites and rocket stages currently floating in space, and up to 900,000 pieces of space junk ranging from 1 to 10 centimeters in size and all large enough to be a collision hazard and a potential cause for disruption to live missions.

For a space station to simulate gravity the space station would have to spin at a speed of 5 RPM to simulate gravity.

When the station spins, centrifugal force acts to pull the inhabitants to the outside.

This process could be used to simulate gravity.

Technically, rotation produces the same effect as gravity because it produces a force (called the centrifugal force) just like gravity produces a force.

An artificial gravity level of 0.1 g can be achieved by a reasonably low rotation rate (5 rpm) at radius as low as 4 m.

Likewise at a radius of 4 m, about 15 rpm would be required to produce Earth gravity at the feet (although gravity would be 50% less at the head), or 21 rpm to produce 2 g.

You can actually create gravity through centripetal force.

The centripetal force that is directed towards the center of the turn is required for any object to move in a circular path.

In the context of a rotating space station it is the normal force provided by the spacecraft's hull that acts as centripetal force.

The only way to get gravity is with mass. The more mass, the more gravity you get.

Without mass, you can't have gravity.

The force of gravity that we feel is actually just an acceleration towards the center of the Earth at 9.8 meters per second squared, or 1G.

Aside from the long-running Anti Gravity column in Scientific American, however, there is no such thing as anti gravity.

Only way out in deep space, beyond the domain of any planets or stars, can you truly escape gravity.

As of yet, no technology exists to neutralize the pull of gravity.

Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter.

On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them.

Gravity is measured by the acceleration that it gives to freely falling objects.

Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy including planets, stars, galaxies, and even light are attracted to one another.

On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the tides of the oceans.

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