Reference Terms
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Black hole
A black hole is a concentration of mass great enough that the force of gravity prevents anything from escaping it except through quantum tunnelling behaviour (known as Hawking Radiation).
Note: The above text is excerpted from the Wikipedia article "Black hole", which has been released under the GNU Free Documentation License.
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Space & Time News
December 3, 2024
Dec. 2, 2024 — A theoretical study suggests that small black holes born in the early universe may have left behind hollow planetoids and microscopic tunnels, and that we should start looking within rocks and old ...
Nov. 26, 2024 — Researchers have made a record-breaking astrophysical discovery while simultaneously uncovering a possible explanation for the rare and extreme astrophysical event known as long-period radio ...
Nov. 26, 2024 — Dark ovals in Jupiter's polar haze, visible only at UV wavelengths, were first noticed 25 years ago, then ignored. A new study shows that these dark UV ovals are common, appearing at the south pole in 75% of Hubble Space Telescope images taken since ...
Nov. 22, 2024 — New research has uncovered what may be the oldest direct evidence of ancient hot water activity on Mars, revealing the planet may have been habitable at some point in its ...
Latest Headlines
updated 12:56 pm ET
Dec. 3, 2024 — An unusual planetary system with three known ultra-low density 'super-puff' planets has at least one more planet, according to new ...
Dec. 2, 2024 — A team of astronomers has found that Venus has never been habitable, despite decades of speculation that our closest planetary neighbor was once much ...
Nov. 18, 2024 — Recent research unlocks new clues that could radically change the world's understanding of the origin of dark ...
Nov. 25, 2024 — A new computer model can be used to detect and measure interior oceans on the ice covered moons of Uranus. The model works by analyzing orbital wobbles that would be visible from a passing ...
Nov. 25, 2024 — When Voyager 2 flew by Uranus and Neptune 40 years ago, astronomers were surprised that it detected no global dipole magnetic fields, like Earth's. The explanation: the ice giants are layered and ...
Nov. 25, 2024 — An international team of researchers has made new observations of an unusual supernova, finding the most metal-poor stellar explosion ever ...
Nov. 25, 2024 — Scientists have recently identified electrons and positrons with the highest energies ever recorded on Earth. They provide evidence of cosmic processes emitting colossal amounts of energy, the ...
Nov. 21, 2024 — A massive collision of galaxies sparked by one travelling at a scarcely-believable 2 million mph (3.2 million km/h) has been seen in unprecedented detail by one of Earth's most powerful telescopes. ...
Nov. 21, 2024 — Axions are the most likely candidate for enigmatic dark matter that dominates the universe. Astrophysicists are searching for evidence of high-mass axions produced during supernovae. Scientists ...
Nov. 21, 2024 — While astronomers have taken about two dozen zoomed-in images of stars in our galaxy, unveiling their properties, countless other stars dwell within other galaxies, so far away that observing even ...