weight hour space velocity
1Space velocity — The space velocity of an astronomical object is its actual motion relative to the Sun or the Local standard of rest.AstrometryIts components in the Galactic coordinate system are usually designated U, V, and W, given in km/s, with U positive in… …
2Space debris — populations seen from outside geosynchronous orbit (GEO). Note the two primary debris fields, the ring of objects in GEO, and the cloud of objects in low earth orbit (LEO) …
3Weight — This article is about the physical concept. For other uses, see Weight (disambiguation). A spring scale measures the weight of an object (according to the operational definition) …
4Space Shuttle external tank — A Space Shuttle External Tank (ET) is the component of the Space Shuttle launch vehicle that contains the liquid hydrogen fuel and liquid oxygen oxidizer. During lift off and ascent it supplies the fuel and oxidizer under pressure to the three… …
5space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
6Space Shuttle Challenger disaster — For more information about the final mission and crew of the Challenger, see STS 51 L. Space Shuttle Challenger s smoke plume after the in flight breakup that killed all seven crew members …
7Space Race — For a discussion of all spaceflight programs to date, see History of spaceflight. For a list of key events, see Timeline of space exploration. For other uses of the term, see Space Race (disambiguation). A replica of Sputnik 1, the world s… …
8International Space Station — ISS redirects here. For other uses, see ISS (disambiguation). International Space Station …
9Outer space — For other uses, see Outer space (disambiguation). The boundaries between the Earth s surface and outer space, at the Kármán line, 100 km (62 mi) and exosphere at 690 km (430 mi). Not to scale Outer space is the void that exists beyond any… …
10NASA Advanced Space Transportation Program — The Advanced Space Transportation Program (ASTP) is a NASA program which is developing future space transportation systems. The ASTP s work, or purpose, is to intentionally advance current technologies, and innovate novel technologies, through… …
