Reference Terms
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Star cluster
Star clusters are groups of stars which are gravitationally bound.
Note: The above text is excerpted from the Wikipedia article "Star cluster", which has been released under the GNU Free Documentation License.
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Space & Time News
May 12, 2025
May 8, 2025 — In space, energetic neutrinos are usually paired with energetic gamma rays. Galaxy NGC 1068, however, emits strong neutrinos and weak gamma rays, which presents a puzzle for scientists to solve. A new paper posits that helium nuclei collide with ...
May 7, 2025 — Magnetar flares, colossal cosmic explosions, may be directly responsible for the creation and distribution of heavy elements across the universe, suggests a new ...
Apr. 28, 2025 — Astrophysicists have discovered a potentially star-forming cloud that is one of the largest single structures in the sky and among the closest to the sun and Earth ever to be detected. The scientists have named the molecular hydrogen cloud 'Eos,' ...
Apr. 25, 2025 — Astronomers have discovered that super-Earth exoplanets are more common across the universe than previously thought. While it can be relatively easy to locate worlds that orbit close to their star, planets with wider paths can be difficult to ...
Latest Headlines
updated 12:56 pm ET
May 12, 2025 — The universe is decaying much faster than thought. This is shown by calculations of scientists on the so-called Hawking radiation. They calculate that the last stellar remnants take about 10^78 years ...
May 12, 2025 — Massive ripples in the very fabric of space and time wash over Earth constantly, although you'd never notice. An astrophysicist is trying a new search for these gravitational ...
May 9, 2025 — Researchers have developed an innovative photodetector capable of detecting a broad range of mid-infrared ...
May 9, 2025 — A research team used the German environmental satellite EnMAP (Environmental Mapping and Analysis Program) to simultaneously detect the two key air ...
May 8, 2025 — A long period of drought in North America has been recognized by scientists for decades. A new study links the severe climate to a change in Earth's ...
May 6, 2025 — In the quest toward finding the correct theory of quantum gravity, physicists have been testing the holographic principle which, they say, is a key property of any valid theory of quantum ...
May 6, 2025 — Astronomers have probed the physical environment of repeating X-ray outbursts near monster black holes thanks to data from NASA's NICER (Neutron star Interior Composition Explorer) and other ...
May 6, 2025 — Neutrinos and antineutrinos are elementary particles with small but unknown mass. High-precision atomic mass measurements have revealed that beta ...
May 5, 2025 — Researchers have developed a new quantum theory of gravity which describes gravity in a way that's compatible with the Standard Model of particle ...
May 5, 2025 — In 1959, physicists James Terrell and Roger Penrose (Nobel laureate in 2020) independently concluded that fast-moving objects should appear rotated. However, this effect has never been demonstrated. ...