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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]
The first humans to escape low Earth orbit were Frank Borman, Jim Lovell and William Anders in 1968 on board the American Apollo 8, which achieved lunar orbit [178] and reached a maximum distance of 377,349 km (234,474 mi) from the Earth.
Low Earth orbit (LEO) This orbit is frequently used by spacecraft that monitor or measure the characteristics of the Earth and its surrounding environment and by uncrewed and crewed space laboratories, such as EURECA and the International Space Station. The orbit's proximity to the Earth has a great influence on the thermal control system needs ...
Objects have reentered with speeds ranging from 7.8 km/s for low Earth orbit to around 12.5 km/s for the Stardust probe. [1] They have high kinetic energies, and atmospheric dissipation is the only way of expending this, as it is highly impractical to use retrorockets for the entire reentry procedure. Crewed space vehicles must be slowed to ...
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 ...
Pressure at which water boils at room temperature (22 °C) (20 mmHg) [43] ... Atmospheric pressure in low Earth orbit, around 500 km altitude [13] [14] 10 −7 Pa.
Very low Earth orbit is a range of orbital altitudes ... Project 200 by Bellatrix Aerospace aims to build an Ultra-Low Orbit satellite that will orbit at a height of ...
The World Meteorological Organization (WMO) confirmed the 130-degree temperature in 2020 as the hottest temperature ever reliably recorded. (At the very least, it will go down as the hottest ...