If you're planning a vacation in Italy you may be wondering what to eat. These articles will help you learn about the Italian food you'll find in Italy. Note that in Italy, food varies by region so be sure to explore the regional specialties where ever you go.
A satellite in low orbit typically about 800 km from the Earth is exposed to an immense gravitational pull and has to move at considerable speed in order to generate a corresponding centrifugal force. There is a direct connection between the distance from the Earth and the orbital velocity of the satellite. At a distance of 36,000 km, the orbiting time is 24 hours, corresponding to the Earth's rotation time. At this distance, a satellite above the Equator will be stationary in relation to the Earth.
Earth is ensnared today in a thick spider web of orbits. Satellites with different assignments fly at different altitudes: U.S. space shuttles are manned satellites of Earth. They usually fly at altitudes around 200 miles above Earth. Rarely, they fly near 400 miles altitude. Russia's orbiting space station Mir is another manned satellite. It maintains its own orbit just above 200 miles altitude. Russian and American navigation satellites guide ships at sea from 100 to 300 miles altitude.