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Categories: Mathematics: Puzzles, Space: Structures and Features
Published Spinning stars shed new light on strange signal coming from galactic center
(via sciencedaily.com) Researchers have found an alternative explanation for a mysterious gamma-ray signal coming from the center of the galaxy, which was long claimed as a signature of dark matter.
Published Classifying exoplanet atmospheres opens new field of study
(via sciencedaily.com) An international team of researchers examined data for 25 exoplanets and found some links among the properties of the atmospheres, including the thermal profiles and chemical abundances in them. These findings will help establish a generalized theory of planet formation which will improve our understanding of all planets, including the Earth.
Published Dying stars' cocoons might explain fast blue optical transients
(via sciencedaily.com) Using a newly developed model, astrophysicists present a new theory to explain fast blue optical transients, a new class of transients that has boggled researchers since their discovery in 2018. In the new study, astrophysicists find that FBOTs could result from the actively cooling cocoons that surround jets launched by dying stars.
Published Astronomers identify likely location of medium-sized black holes
(via sciencedaily.com) Intermediate-mass black holes are notoriously hard to find but a new study indicates there may be some at the center of dense, star clusters located throughout the universe. A study now sheds new light on when and where black holes of about 100-100,000 solar masses could form and how they came into being.
Published Why Venus rotates, slowly, despite sun's powerful grip
(via sciencedaily.com) If not for the soupy, fast-moving atmosphere on Venus, Earth's sister planet would likely not rotate. Instead, Venus would be locked in place, always facing the sun the way the same side of the moon always faces Earth.
Published Nova outbursts are apparently a source for cosmic rays
(via sciencedaily.com) The MAGIC telescopes have observed the nova RS Ophiuchi shining brightly in gamma rays at extremely high energy. The Gamma rays emanate from protons that are accelerated to very high energies in the shock front following the explosion. This suggests that novae are also a source of the ubiquitous cosmic radiation in the universe which consists mainly of protons rich in energy, which race through space at almost the speed of light.
Published Hubble sheds light on origins of supermassive black holes
(via sciencedaily.com) Astronomers have identified a rapidly growing black hole in the early universe that is considered a crucial 'missing link' between young star-forming galaxies and the first supermassive black holes. They used data from NASA's Hubble Space Telescope to make this discovery.
Published Simulating supernova remnants, star formation in earthbound lab
(via sciencedaily.com) When triggered by some external agent, shockwaves can propagate through molecular clouds of gas and dust to create pockets of dense material. At a certain limit, that dense gas and dust collapses and begins to form new stars. Researchers modeled this interaction using a high-power laser and a foam ball. The foam ball represents a dense area within a molecular cloud. The high-power laser creates a blast wave that propagates through a surrounding chamber of gas and into the ball, where the team observed the compression using X-ray images.
Published Hunting for gravitational waves from monster black holes
(via sciencedaily.com) Our universe is a chaotic sea of ripples in space-time called gravitational waves. Astronomers think waves from orbiting pairs of supermassive black holes in distant galaxies are light-years long and have been trying to observe them for decades, and now they're one step closer.
Published Hubble probes extreme weather on ultra-hot Jupiters
(via sciencedaily.com) Astronomers have discovered bloated Jupiter-sized worlds that are so precariously close to their parent star they are being roasted at seething temperatures above 3,000 degrees Fahrenheit. That's hot enough to vaporize most metals, including titanium. They have the hottest planetary atmospheres ever seen. Hubble astronomers are reporting on bizarre weather conditions on these sizzling worlds. It's raining vaporized rock on one planet, and another one has its upper atmosphere getting hotter rather than cooler because it is being 'sunburned' by intense ultraviolet (UV) radiation from its star.
Published 'Prenatal' protoplanet upends planet formation models
(via sciencedaily.com) An international research team has discovered a new planet so young that it has yet to emerge from the womb of matter where it is forming. This is the youngest protoplanet discovered to date. It's location and the surrounding patterns of matter suggest that an alternative method of planet formation may be at work. This discovery could help to explain the histories and features of extrasolar planets seen around other stars.
Published Methane could be the first detectable indication of life beyond Earth
(via sciencedaily.com) Original source A new study assesses the planetary context in which the detection of methane in an exoplanet's atmosphere could be considered a compelling sign of life.
Published Ancient helium leaking from core offers clues to Earth's formation
(via sciencedaily.com) Helium-3, a rare isotope of helium gas, is leaking out of Earth's core, a new study reports. Because almost all helium-3 is from the Big Bang, the gas leak adds evidence that Earth formed inside a solar nebula, which has long been debated.
Published Mysterious death of carbon star plays out like six-ring circus
(via sciencedaily.com) Scientists studying V Hydrae (V Hya) have witnessed the star's mysterious death throes in unprecedented detail. The team discovered six slowly-expanding rings and two hourglass-shaped structures caused by the high-speed ejection of matter out into space.
Published Single-photon source paves the way for practical quantum encryption
(via sciencedaily.com) Researchers describe new high-purity single-photon source that can operate at room temperature. The source is an important step toward practical applications of quantum technology, such as highly secure communication based on quantum key distribution (QKD).
Published Researchers map the movement of white dwarfs of the Milky Way
(via sciencedaily.com) White dwarfs were once normal stars similar to the Sun but then collapsed after exhausting all their fuel. These interstellar remnants have historically been difficult to study. However, a recent study reveals new information about the movement patterns of these puzzling stars.
Published Active video games provide alternative workout
(via sciencedaily.com) Working out isn't known for being fun. But new active video and virtual reality games may help change that. Exergaming, or active video gaming, may be the perfect introduction to helping people be more active, according to new research.
Published Look! Up in the sky! Is it a planet? Nope, just a star
(via sciencedaily.com) Original source Among thousands of known exoplanets, astronomers have flagged three that are actually stars.
Published Scientists announce discovery of supermassive binary black holes
(via sciencedaily.com) Researchers have discovered a supermassive black hole binary system, one of only two known such systems.
Published Black hole billiards in the centers of galaxies
(via sciencedaily.com) Researchers provide the first plausible explanation to why one of the most massive black hole pairs observed to date by gravitational waves also seemed to merge on a non-circular orbit. Their suggested solution involves a chaotic triple drama inside a giant disk of gas around a super massive black hole in a galaxy far, far away.