jump to other results. 1  1[countable] a particular attitude towards something; a way of thinking about something synonym viewpoint a global perspective Recent events seem less serious when put into an international perspective.
Low earth orbit is only slightly above the Earth, by outer space standards, 124 - 1240 miles (200 - 2000 km) in altitude. Below 124 miles, orbits rapidly degrade, causing surface impact, and above 1,240 miles or even less, the Earth's radiation belts damage electronic equipment, necessitating special shielding. The region from 1,243 miles altitude to geostationary orbit (35,786 kilometers or 22,236 mi) is known as Medium Earth Orbit.
To find the approximate distance between the orbits of two planets in AU, subtract the two planet-Sun distances. For example, Earth orbits at 1 AU from the Sun and Venus orbits at 0.72 AU from the Sun. The difference between these two distances is 1.00 - 0.72 = 0.28 AU. To get the number in kilometers, multiply by the conversion above: 0.28 Ã (150 million kilometers) = 42 million kilometers. Another example: Jupiter is 5.2 AU from the Sun and Earth is 1.0 AU from the Sun. So the distance between Jupiter's orbit and Earth's orbit is about 5.2 - 1.0 = 4.2 AU or 630 million kilometers.