Search results
Results From The WOW.Com Content Network
This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following ...
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; it is widely but not universally accepted.
VY Canis Majoris has been known to be an extreme object since the middle of the 20th century, although its true nature was uncertain. [45] [57] In the late 20th century, it was accepted that it was a post-main sequence red supergiant. Its angular diameter had been measured and found to be significantly different depending on the observed ...
Transatmospheric orbit (TAO): geocentric orbits with an apogee above 100 km and perigee that intersects with the defined atmosphere. [4] Very low Earth orbit (VLEO) is defined as altitudes between approximately 100 - 450 km above Earth’s surface. [5] [6] Low Earth orbit (LEO): geocentric orbits with altitudes below 2,000 km (1,200 mi). [7]
NASA's Ingenuity helicopter, which flew on Mars in April 2021, became the first aircraft to achieve powered, controlled flight on a planet other than Earth.
The altitude of 118 km (73.3 mi) above Earth was the midpoint for charged particles transitioning from the gentle winds of the Earth's atmosphere to the more extreme flows of outer space. The latter can reach velocities well over 268 m/s (880 ft/s).
The planet’s equivalent of the Sun, called Gliese 12, is a cool red dwarf located in constellation Pisces. The star is only about 27% of the Sun’s size, with about 60% of the Sun’s surface ...
Although red supergiants are much cooler than the Sun, they are so much larger that they are highly luminous, typically tens or hundreds of thousands L ☉. [9] There is a theoretical upper limit to the radius of a red supergiant at around 1,500 R ☉. [9] In the Hayashi limit, stars above this radius would be too unstable and simply do not form.