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Thu, 5 Aug 2021
Understanding the Sun's magnetic dynamo could help predict solar weather, such as potentially dangerous geothermal storms, solar flares and sunspots. Mathematicians have proposed a new model of the Sun that matches observed data.
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Thu, 5 Aug 2021
A team of astronomers have shed new light on planets around a nearby star, L 98-59, that resemble those in the inner Solar System. Amongst the findings are a planet with half the mass of Venus -- the lightest exoplanet ever to be measured using the radial velocity technique -- an ocean world, and a possible planet in the habitable zone.
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Wed, 4 Aug 2021
New research has revealed the solution to Jupiter's 'energy crisis', which has puzzled astronomers for decades. Astronomers have created a detailed global map of the gas giant's upper atmosphere, confirming that Jupiter's powerful aurorae are responsible for delivering planet-wide heating.
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Wed, 4 Aug 2021
New research provides a closer look at a nearby star thought to resemble our young Sun. The work allows scientists to better understand what our Sun may have been like when it was young, and how it may have shaped the atmosphere of our planet and the development of life on Earth.
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Tue, 3 Aug 2021
Researchers found that power could be sent to a free-flying drone via a beam of microwave radiation. The team estimated the efficiency of this process and compared it with that for a fixed-position drone. The results have implications for the possibility of using such microwave power transmission to launch aircraft, spacecraft, and rockets and avoid the high onboard-fuel requirements of commonly used propulsion approaches.
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Mon, 2 Aug 2021
About 2,000 light-years away from Earth, there is a star catapulting toward the edge of the Milky Way. This particular star is one of a unique breed of fast-moving stars -- remnant pieces of massive white dwarf stars -- that have survived in chunks after a gigantic stellar explosion.
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Mon, 2 Aug 2021
A vital piece of gas engines, combustors -- the chambers in which the combustion powering the engine occurs -- have the problem of breaking down due to fatal high-frequency oscillations during the combustion process. Now, through advanced time-series analyses based on complex systems, researchers have found what causes them, opening up novel paths to solving the problem.
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Fri, 30 Jul 2021
Astronomers have developed a new way to capture all the exquisite 'layer-cake' details of a brown dwarf's cloud structure. Because brown dwarfs are similar to super-Jupiters, this innovative technique can help deepen scientists' understanding of the atmospheres of giant alien worlds that are more massive than Jupiter.
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Thu, 29 Jul 2021
Astronomers have captured the first-ever spin measurements of HR 8799, the famed system that made history as the very first exoplanetary system to have its image taken.
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Thu, 29 Jul 2021
Researchers have discovered long narrow dust filaments which surround and feed black holes in the centers of galaxies, and which could be the natural cause of the darkening of the centers of many galaxies when their nuclear black holes are active.
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Thu, 29 Jul 2021
For years scientists have been debating what might lay under the Martian planet's south polar cap after bright radar reflections were discovered and initially attributed to water. But now, a new study puts that theory to rest and demonstrates for the first time that another material is most likely the answer.
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Thu, 29 Jul 2021
A combination of a once-debunked 19th-century identification of a water-carrying iron mineral and the fact that these rocks are extremely common on Earth, suggests the existence of a substantial water reservoir on Mars, according to a team of geoscientists.
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Thu, 29 Jul 2021
A new study suggests that previously displaced gases can re-accrete onto galaxies, potentially slowing down the process of galaxy death caused by ram pressure stripping, and creating unique structures more resistant to its effects.
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Wed, 28 Jul 2021
Under normal conditions, pure water is an almost perfect insulator. Water only develops metallic properties under extreme pressure, such as exists deep inside of large planets. Now, an international collaboration has used a completely different approach to produce metallic water and documented the phase transition at BESSY II.
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Wed, 28 Jul 2021
Scientists have published a new, detailed radio image of the Andromeda galaxy -- the Milky Way's sister galaxy -- which will allow them to identify and study the regions of Andromeda where new stars are born.
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Wed, 28 Jul 2021
Fulfilling a prediction of Einstein's theory of General Relativity, researchers report the first-ever recordings of X-ray emissions from the far side of a black hole.
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Wed, 28 Jul 2021
Middle-aged stars can experience their own kind of midlife crisis, experiencing dramatic breaks in their activity and rotation rates at about the same age as our Sun, according to new research. The study provides a new theoretical underpinning for the unexplained breakdown of established techniques for measuring ages of stars past their middle age, and the transition of solar-like stars to a magnetically inactive future.
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Tue, 27 Jul 2021
Magnetic fields around black holes decay quickly, researchers report. This finding backs up the so-called 'no-hair conjecture' predicted by Einstein's general relativity.
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Tue, 27 Jul 2021
Black holes, detected by their gravitational wave signal as they collide with other black holes, could be the product of much earlier parent collisions. Such an event has only been hinted at so far, but scientists believe we are getting close to tracking down the first of these so-called 'hierarchical' black holes.
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Tue, 27 Jul 2021
Astrophysicists have discovered the presence of transverse rotation (in the plane of the sky) in three dwarf spheroidal galaxies, a very faint type of galaxies and difficult to observe, which are orbiting round the Milky Way; this helps to trace their evolutionary history.
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Mon, 26 Jul 2021
On Aug. 26, 2020, NASA's Fermi Gamma-ray Space Telescope detected a pulse of high-energy radiation that had been racing toward Earth for nearly half the present age of the universe. Lasting only about a second, it turned out to be one for the record books -- the shortest gamma-ray burst (GRB) caused by the death of a massive star ever seen.
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Mon, 26 Jul 2021
Astronomers have uncovered evidence of water vapor in the atmosphere of Jupiter's moon Ganymede. This water vapor forms when ice from the moon's surface sublimates -- that is, turns from solid to gas. Astronomers re-examined Hubble observations from the last two decades to find this evidence of water vapor.
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Thu, 22 Jul 2021
A dust storm that engulfed Mars in 2018 destroyed a vortex of cold air around the planet's south pole and brought an early spring to the hemisphere. By contrast, the storm caused only minor distortions to the polar vortex in the northern hemisphere and no dramatic seasonal changes.
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Thu, 22 Jul 2021
A team is paving the way for future rovers to search for meteorites on Mars. The scientists are using an extensive meteorite collection to test the spectral instruments destined for the ExoMars rover Rosalind Franklin, and develop tools to identify meteorites on the surface of the red planet.
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Thu, 22 Jul 2021
Researchers have been able to use seismic data to look inside Mars for the first time. They measured the crust, mantle and core and narrowed down their composition.
