The majority of dark matter is thought to be non-baryonic in nature, possibly being composed of some as-yet undiscovered subatomic particles. Its presence is implied…
While the consensus among physicists is that gravity will attract both matter and antimatter at the same rate that matter attracts matter, there is a…
Precoolers were proposed as part of the research in America on Project Suntan – a liquid hydrogen fuelled aircraft. Robert P. Carmichael in 1955 devised…
Nearly polar orbit around a planet, in which the satellite passes over any given point of the planet’s surface at the same local mean solar…
The Hubble classification system rates elliptical galaxies on the basis of their ellipticity, ranging from E0, being nearly spherical, up to E7, which is highly…
In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites…
