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Earth's atmosphere photographed from the International Space Station.The orange and green line of airglow is at roughly the altitude of the Kármán line. [1]The Kármán line (or von Kármán line / v ɒ n ˈ k ɑːr m ɑː n /) [2] is a conventional definition of the edge of space, though it is not universally accepted.
This distinguishes altitudes below as the region of aerodynamics and airspace, and above as the space of astronautics and free space. [16] There is no internationally recognized legal altitude limit on national airspace, although the Kármán line is the most frequently used for this purpose.
Outer space does not begin at a definite altitude above Earth's surface. The Kármán line, an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. Certain portions of the upper stratosphere and the mesosphere are
Absolute space acts on physical objects by inducing their resistance to acceleration but it cannot be acted upon. Newton himself recognized the role of inertial frames. [11] The motions of bodies included in a given space are the same among themselves, whether that space is at rest or moves uniformly forward in a straight line.
It was the first human-made object to reach outer space, attaining an apogee of 176 kilometers, [22] which is well above the Kármán line. [23] It was a vertical test launch. Although the rocket reached space, it did not reach orbital velocity, and therefore returned to Earth in an impact, becoming the first sub-orbital spaceflight. [24]
From blue comets and pink northern lights to snowy volcanos and winding rivers, the view 250 miles above Earth does not disappoint. Here are the best photos of 2024 from the space station .
Airspace [1] is the portion of the atmosphere controlled by a country above its territory, including its territorial waters or, more generally, any specific three-dimensional portion of the atmosphere. [2]
The claim that the Great Wall of China is the only man-made object visible from the Moon or outer space has been debunked many times, but remains a common misconception in popular culture. [1] [2] [4] According to astronauts Eugene Cernan and Ed Lu, the Great Wall is visible from the lower part of low Earth orbit, but only under very favorable ...