Reference Terms
from Wikipedia, the free encyclopedia
Rocket engine
A rocket engine is a reaction engine that can be used for spacecraft propulsion as well as terrestrial uses, such as missiles.
Note: The above text is excerpted from the Wikipedia article "Rocket engine", which has been released under the GNU Free Documentation License.
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Space & Time News
September 19, 2024
Sep. 18, 2024 Astronomers have spotted the biggest pair of black hole jets ever seen, spanning 23 million light-years in total length. That's equivalent to lining up 140 Milky Way galaxies back to ...
Sep. 17, 2024 Watching for changes in Mars' orbit over time could be new way to detect passing dark matter, according to ...
Sep. 13, 2024 Physicists propose that a mysterious force known as early dark energy could solve two of the biggest puzzles in cosmology and fill in some major gaps in our understanding of how the early universe ...
Sep. 11, 2024 Astronomers have captured images of a star other than the Sun in enough detail to track the motion of bubbling gas on its surface. The images of the star, R Doradus, were obtained in July and August 2023. They show giant, hot bubbles of gas, 75 ...
Latest Headlines
updated 12:56 pm ET
Sep. 19, 2024 By staring into the hellish landscape of Jupiter's moon Io -- the most volcanically active location in the solar system -- astronomers have been able to study a fundamental process in planetary ...
Sep. 19, 2024 Researchers have developed a Martian atmospheric evolution model to propose a new theory about Mars's ...
Sep. 18, 2024 A newly discovered cluster-scale strong gravitational lens, with a rare alignment of seven background lensed galaxies, provides a unique opportunity to study ...
Sep. 18, 2024 Astronomers examined galaxy Arp 107 which has revealed a wealth of information about star-formation and how two galaxies collided hundreds of million years ago. Arp 107 is located 465 million ...
Sep. 17, 2024 In a new paper, physicists argue that close observations of merging black hole pairs may unveil information about potential new ...
Sep. 17, 2024 With the help of NASA's Hubble Space Telescope, an international team of scientists has found more black holes in the early universe than has previously been reported. The new result can help ...
Sep. 16, 2024 Astronomers have used the NASA/ESA James Webb Space Telescope to confirm that supermassive black holes can starve their host galaxies of the fuel they need to form new ...
Sep. 11, 2024 Mold can survive the harshest of environments, so to stop harmful spores from growing on future space stations, a study suggests a way to prevent its ...
Sep. 13, 2024 Hundreds of gamma-ray bursts (GRBs) have been recorded as part of an enormous global effort so extensive it 'rivals the catalog of deep-sky objects created by Messier 250 years ago', astronomers say. ...
Sep. 13, 2024 Researchers have invented a technique that enables low Earth orbit satellite antennas to manage signals for multiple users at once, slashing costs and simplifying designs for communication ...