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Outer space. A view of the boundary between outer space and Earth, roughly where the yellow-green line of airglow is visible, as viewed from the International Space Station (ISS). Outer space (or simply space) is the expanse beyond celestial bodies and their atmospheres. It contains ultra-low levels of particle densities, constituting a near ...
Lost Cosmonauts. The Lost Cosmonauts or Phantom Cosmonauts are subjects of a conspiracy theory, which alleges that Soviet and Russian space authorities have concealed the deaths of some cosmonauts in outer space. Proponents of the Lost Cosmonauts theory argue that the Soviet Union attempted to launch human spaceflights before Yuri Gagarin 's ...
A black hole is a region of spacetime where gravity is so strong that nothing, including light and other electromagnetic waves, is capable of possessing enough energy to escape it. [2] Einstein 's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
Theoretical astronomy. Theoretical astronomy is the use of analytical and computational models based on principles from physics and chemistry to describe and explain astronomical objects and astronomical phenomena. Theorists in astronomy endeavor to create theoretical models and from the results predict observational consequences of those ...
It is aimed primarily at deep-space objects. 1990 – Preliminary results from NASA 's COBE mission confirm the cosmic microwave background radiation has a blackbody spectrum to an astonishing one part in 10 5 precision, thus eliminating the possibility of an integrated starlight model proposed for the background by steady state enthusiasts.
Deep space exploration (or deep-space exploration) is the branch of astronomy, astronautics and space technology that is involved with exploring the distant regions of outer space. [1] However, there is little consensus on the meaning of "distant" regions. In some contexts, it is used to refer to interstellar space.
Conspiracy theorists say that the films of the missions were made using sets similar to this training mockup. Moon landing conspiracy theories claim that some or all elements of the Apollo program and the associated Moon landings were hoaxes staged by NASA, possibly with the aid of other organizations. The most notable claim of these conspiracy ...
NASA's 2.3 kW NSTAR ion thruster for the Deep Space 1 spacecraft during a hot fire test at the Jet Propulsion Laboratory Main article: Spacecraft electric propulsion Electric propulsion is commonly used for station keeping on commercial communications satellites and for prime propulsion on some scientific space missions because of their high ...