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This is a timeline of space exploration which includes notable achievements, first accomplishments and milestones in humanity's exploration of outer space. This timeline generally does not distinguish achievements by a specific country or private company, as it considers humanity as a whole.
c. 560 BCE – Anaximander is arguably the first to conceive a mechanical model of the world, although highly inaccurate: a cylindrical Earth [11] floats freely in space surrounded by three concentric wheels turning at different distances: the closest for the stars and planets, the second for the Moon and the farthest for the Sun, all conceived ...
The Stelliferous Era, is defined as, "6 < n < 14". This is the current era, in which matter is arranged in the form of stars, galaxies, and galaxy clusters, and most energy is produced in stars. Stars will be the most dominant objects of the universe in this era. Massive stars use up their fuel very rapidly, in as little as a few million years.
The U.S. space agency's SPHEREx space telescope is tentatively scheduled to be launched on Friday aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California.
The Webb Space Telescope is marking one year of cosmic photographs with one of its best yet: the dramatic close-up of dozens of stars at the moment of birth. The region is relatively small and ...
Size comparison of a hypothetical quasi-star to some of the largest known stars. A quasi-star rendered with Celestia. A quasi-star (also called black hole star) is a hypothetical type of extremely large and luminous star that may have existed early in the history of the Universe.
Demonstrate low-thrust plasma propulsion in deep space. BioSentinel: Heliocentric Success Contains yeast cards that will be rehydrated in space, designed to detect, measure, and compare the effects of deep space radiation. LunaH-Map: Moon Failure Search for evidence of lunar water ice inside permanently shadowed craters using its neutron detector.
Stars passing too close to a supermassive black hole can be shredded into streamers that shine very brightly before being "swallowed." [8] If other stars are orbiting a black hole, their orbits can be used to determine the black hole's mass and location. Such observations can be used to exclude possible alternatives such as neutron stars.