It's still just a plan, but a new telescope could soon be measuring gravitational waves. Gravitational waves are something like the sound waves of the universe. They are created, for example, when black holes or neutron stars ...
Astronomy
Jun 12, 2024
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Several international research groups have already confirmed the theory that there are two black holes at the center of the distant galaxy OJ 287, first suggested by astronomers at the University of Turku, Finland. A new ...
Astronomy
Jun 12, 2024
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Michigan State University researchers have made groundbreaking discoveries about the supermassive black hole at the center of our Milky Way galaxy. These findings, based on data from NASA's NuSTAR X-ray telescope, were presented ...
Astronomy
Jun 11, 2024
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Despite being extraordinarily difficult to detect for the first time, gravitational waves can be found using plenty of different techniques. The now-famous first detection at LIGO in 2015 was just one of the various ways ...
Astronomy
Jun 7, 2024
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Dark matter is a hypothetical form of matter that is implied by gravitational effects that can't be explained by general relativity unless more matter is present in the universe than can be seen. It remains virtually as mysterious ...
Astronomy
Jun 7, 2024
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For every kilogram of matter that we can see—from the computer on your desk to distant stars and galaxies—there are 5 kilograms of invisible matter that suffuse our surroundings. This "dark matter" is a mysterious entity ...
General Physics
Jun 6, 2024
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What is dark matter? That question is prominent in discussions about the nature of the universe. There are many proposed explanations for dark matter, both within the Standard Model and outside of it.
Astronomy
Jun 6, 2024
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A new method of detecting high-frequency gravitational waves (HFGWs) has been proposed by a research team led by Prof. Tao Liu, Associate Professor from the Department of Physics at the Hong Kong University of Science and ...
Astronomy
Jun 5, 2024
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When speaking of our universe, it's often said that "matter tells spacetime how to curve, and curved spacetime tells matter how to move." This is the essence of Albert Einstein's famous general theory of relativity, and describes ...
General Physics
Jun 4, 2024
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This new image from the NASA/ESA Hubble Space Telescope shows the broad and sweeping spiral galaxy NGC 4731. It lies in the constellation Virgo and is located 43 million light-years from Earth. This highly detailed image ...
Astronomy
Jun 3, 2024
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Gravitation, or gravity, is a natural phenomenon by which physical bodies attract with a force proportional to their mass. Gravitation is most familiar as the agent that gives weight to objects with mass and causes them to fall to the ground when dropped. Gravitation causes dispersed matter to coalesce, and coalesced matter to remain intact, thus accounting for the existence of the Earth, the Sun, and most of the macroscopic objects in the universe.
Gravitation is responsible for keeping the Earth and the other planets in their orbits around the Sun; for keeping the Moon in its orbit around the Earth; for the formation of tides; for natural convection, by which fluid flow occurs under the influence of a density gradient and gravity; for heating the interiors of forming stars and planets to very high temperatures; and for various other phenomena observed on Earth.
Gravitation is one of the four fundamental interactions of nature, along with electromagnetism, and the nuclear strong force and weak force. Modern physics describes gravitation using the general theory of relativity by Einstein, in which it is a consequence of the curvature of spacetime governing the motion of inertial objects. The simpler Newton's law of universal gravitation provides an accurate approximation for most physical situations.
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