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  1. en.wikipedia.org › wiki › Low_Earth_orbitLow Earth orbit - Wikipedia

    A low Earth orbit (LEO) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less than 0.25. [ 1 ] Most of the artificial objects in outer space are in LEO, peaking in number at an altitude around 800 km (500 mi), [ 2 ] while the farthest in LEO, before medium Earth orbit (MEO ...

  2. www.britannica.com › technology › low-Earth-orbitLow Earth orbit (LEO) | Definition, Distance, & Facts ...

    Oct 12, 2024 · News •. low Earth orbit (LEO), region of space where satellites orbit closest to Earth ’s surface. There is no official definition of this region, but it is usually considered to be between 160 and 1,600 km (about 100 and 1,000 miles) above Earth. Satellites do not orbit below 160 km because they are affected by atmospheric drag.

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  4. www.spacefoundation.org › space_brief › types-of-orbitsTypes of Orbits - Space Foundation

    Oct 1, 2024 · Types of Orbits. Written by: Space Foundation Editorial Team. There are several types of Earth orbit, and each offers certain advantages and capabilities. Low Earth Orbit (LEO) LEO is commonly used for communication and remote sensing satellite systems, as well as the International Space Station (ISS) and Hubble Space Telescope. Medium Earth Orbit

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  5. earthobservatory.nasa.gov › features › OrbitsCatalogCatalog of Earth Satellite Orbits - NASA Earth Observatory

    Two medium Earth orbits are notable: the semi-synchronous orbit and the Molniya orbit. The semi-synchronous orbit is a near-circular orbit (low eccentricity) 26,560 kilometers from the center of the Earth (about 20,200 kilometers above the surface). A satellite at this height takes 12 hours to complete an orbit.

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    • 2009
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  6. phys.libretexts.org › Bookshelves › Astronomy14.4: Formation of the Solar System - Physics LibreTexts

    Jul 29, 2023 · Close to the poles, the spin rate is slow, and it gets faster as you get closer to the equator. In the same way, near the poles of the nebula, where orbits were slow, the nebular material fell directly into the center. Faster moving material, on the other hand, collapsed into a flat disk revolving around the central object (Figure 14.11).

  7. www.esa.int › Space_Transportation › Types_of_orbitsESA - Types of orbits - European Space Agency

    Mar 30, 2020 · Satellites in a polar orbit do not have to pass the North and South Pole precisely; even a deviation within 20 to 30 degrees is still classed as a polar orbit. Polar orbits are a type of low Earth orbit, as they are at low altitudes between 200 to 1000 km. Sun-synchronous orbit (SSO) is a particular kind of polar orbit.

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  9. ourworldindata.org › grapher › low-earth-orbits-objectsTracked objects in low Earth orbit, by type - Our World in Data

    Donate now. Objects are subtracted from the time series after they have reentered the Earth's atmosphere. Not all objects are tracked: in 2021, the European Space Agency estimated there were more than 130 million space debris objects larger than 1 millimeter.