(ORDO NEWS) — Gravity causes each object to attract all other objects to itself. Some people think that there is no gravity in space. In fact, a small amount of gravity can be found everywhere in space.
Gravity is what keeps the moon in orbit around the earth, gravity makes the earth revolve around the sun. It holds the Sun in place in the Milky Way galaxy. Gravity, however, gets weaker with distance.
A spacecraft can get far enough away from the Earth, but the person inside it will still feel very little gravity. But this has nothing to do with why things float in a spaceship in orbit.
The International Space Station revolves around the Earth at an altitude of about 400 kilometers. At this altitude, Earth’s gravity is about 90 percent of what it is on the planet’s surface.
In other words, if a person who weighs 100 kg on the surface of the Earth rises to the International Space Station, then he will weigh 90 kg on it.
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