Everything Is Topsy Turvy

  • Robert W. Phillips
Part of the Astronomers' Universe book series (ASTRONOM)


What happens to gravity? Is it really zero when we go into space? After all, everything that is not fastened down floats, including astronauts and their belongings. Surprisingly, zero gravity does not actually exist. All solar systems in the universe, stars and their orbiting planets are held together by gravity. Earth’s gravitational field holds the moon in an orbit about 238,000 miles away. The moon’s gravitational field causes the tides in Earth’s oceans. All of the planets and moons in our Solar System are held in stable orbits by the Sun’s gravitational field. Zero gravity is not an accurate description of space flight conditions.


Gravitational Field Motion Sickness Space Flight Free Fall Space Vehicle 
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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Fort CollinsUSA

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