A new theory suggests that Titan's majestic dune fields may have come from outer space. Researchers had always assumed that the sand making up Titan's dunes was locally made, through erosion or condensed from atmospheric ...
Planetary Sciences
21 hours ago
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18
Just as sat-nav did away with the need to argue over the best route home, scientists from the University of Surrey have developed a new method to find the optimal routes for future space missions without the need to waste ...
Space Exploration
Apr 17, 2024
0
133
A piece of space junk recently crashed through the roof and floor of a man's home in Florida. Nasa later confirmed that the object had come from unwanted hardware released from the international space station.
Space Exploration
Apr 17, 2024
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0
Over the past decade, metasurfaces deploying two-dimensional artificial nanostructures have emerged as a groundbreaking platform to manipulate light across various degrees of freedom. These metasurfaces exhibit significant ...
Optics & Photonics
Apr 16, 2024
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1
By analyzing the data from ESA's Gaia satellite, Chinese astronomers have detected a new tidal stellar stream in the northern hemisphere, which has a low metallicity and a relatively high energy. The finding was reported ...
A reaction wheel—one of the heaviest parts of a space mission, its changing rotation used to shift a satellite's orientation—seen in a plasma wind tunnel belonging to the High Enthalpy Flow Diagnostics Group (HEFDiG) ...
Space Exploration
Apr 11, 2024
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2
Defeating dust may be a small concern for most people on Earth, but for astronauts and spacecraft destined for the moon or Mars, it is a significant hazard that must be mitigated. That's why researchers at NASA's Kennedy ...
Space Exploration
Apr 11, 2024
0
27
To address a rapidly changing space operating environment and ensure its preservation for generations to come, NASA released the first part of its integrated Space Sustainability Strategy, on Tuesday advancing the agency's ...
Space Exploration
Apr 10, 2024
0
2
If you've ever been taught about how Earth orbits around the sun, you might well think our planet travels along an oval-shaped path that brings it much closer to the sun at some times of the year than at others. You'd have ...
Education
Apr 8, 2024
0
74
The US and Japan are sponsoring a resolution for debate by the United Nations security council which—if passed—will reaffirm international commitments to the 1967 outer space treaty (OST) forbidding the deployment and ...
Space Exploration
Apr 8, 2024
0
25
In physics, an orbit is the gravitationally curved path of one object around a point or another body, for example the gravitational orbit of a planet around a star.
Historically, the apparent motion of the planets were first understood in terms of epicycles, which are the sums of numerous circular motions. This predicted the path of the planets quite well, until Johannes Kepler was able to show that the motion of the planets were in fact elliptical motions.[citation needed] Isaac Newton was able to prove that this was equivalent to an inverse square, instantaneously propagating force he called gravitation.[citation needed] Albert Einstein later was able to show that gravity is due to curvature of space-time, and that orbits lie upon geodesics. This is the current understanding.
This text uses material from Wikipedia, licensed under CC BY-SA
