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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]
A significant event related to the Kessler Syndrome occurred on August 9, 2024, when a Chinese Long March 6A rocket broke apart in low-Earth orbit, creating a cloud of hundreds of debris fragments. The US Space Command confirmed this breakup, and it has been tracked by multiple space debris-tracking organizations.
Very low Earth orbit is a range of orbital altitudes below 400 km (250 mi), and is of increasing commercial importance in a variety of scenarios and for multiple applications, in both private and government satellite operations.
Low Earth orbit is densely packed, with bands such as the one for satellite internet service Starlink from commercial space company SpaceX - at an altitude of 540–570 km (336-354 miles).
Another Long March 6A rocket body exploded in a region of low-Earth orbit densely populated by satellites on November 12, 2022, and the resulting 500-plus debris fragments were distributed between ...
In low-earth orbit, objects can collide at around 23,000 miles an hour, enough for even the tiniest debris to crack the windows on the International Space Station. Nearly 30,000 objects are ...
The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy.
The upper limit for crewed return to Earth from low Earth orbit (LEO) or lunar return is 10g. [68] For Martian atmospheric entry after long exposure to zero gravity, the upper limit is 4 g . [ 68 ] Peak dynamic pressure can also influence the selection of the outermost TPS material if spallation is an issue.
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