Articles tagged with Stars
A new space imaging technique, using charge injection devices, may help scientists directly image exoplanets next to bright stars. This technology has been successfully tested, enabling the detection of objects 70 million times fainter than the host star's light.
Astronomers have found a massive tail of hydrogen gas extending from a nearby galaxy, measuring five times longer than the galaxy itself. The discovery suggests that this phenomenon is common in galaxy clusters, and could be indicative of many other galaxies having similar features.
Researchers have discovered young populations of stars within globular clusters that originated from external gas and dust, rather than internal processes. This study suggests that globular clusters can form new stars by 'adopting' stray cosmic gases, turning a complex picture into a more nuanced one.
Researchers discovered young star populations in old globular clusters that formed from gas flowing in from outside the cluster itself. This challenge traditional understanding of star birth and highlights the complex nature of globular clusters.
Researchers used intensity interferometry to study light propagation in curved spaces, demonstrating the importance of surface curvature on geometry and physics. The findings have implications for astronomical observations and manufacturing techniques, potentially leading to new materials and optical systems.
Researchers identified massive stars moving at supersonic speeds, creating bow shocks that help locate them. The team used infrared data to find over 200 images of fuzzy red arcs, which turned out to be stars in various stages of evolution.
An international team of astronomers found strong magnetic fields are common in stars, contradicting previous assumptions. The study used data from NASA's Kepler mission to analyze over 700 red giant stars and discovered that many host internal magnetic fields up to 10 million times stronger than Earth's.
NASA's Hubble Space Telescope has photographed a newborn star with twin jets, reminiscent of a Star Wars lightsaber, in the Orion B molecular cloud complex. The protostar is feeding on surrounding material and shooting gas into space, creating shock fronts that heat up the surrounding gas.
Astronomers measured the density of photon fog between Earth and quasar PKS 1441+25 using high-energy gamma rays. The data validated theoretical models for the number and brightness of stars and galaxies in the universe going back 7.6 billion years.
An international team of astrophysicists led by Johns Hopkins University scientist Sjoert van Velzen witnessed a star being destroyed by a supermassive black hole, ejecting a jet of plasma at nearly the speed of light. The team observed this event over several months using multi-wavelength telescopes and satellites.
A team of scientists has discovered a hungry black hole swallowing a star at the centre of a nearby galaxy. The discovery confirms their theories about the nature of black holes and reveals faint jets of material shooting out from the supermassive black hole.
Researchers found that tiny dips in a star's brightness can indicate a planet passing in front of it, but star KIC 8462852 had deep and irregular dips. The astronomers concluded that the destruction of a family of comets near the star is the most likely explanation for the mysterious dimming.
Researchers from the University of Sydney and other institutions have directly observed a planet in formation for the first time. The planet, located 450 light years away, is surrounded by a vast disc of dust and gas, and its presence has been confirmed through images and spectral fingerprint analysis.
Scientists have discovered a new exoplanet, GJ 1132b, that is rocky and Earth-sized, orbiting a small star just 39 light-years from Earth. The planet's surface temperature is estimated to be around 500 degrees Fahrenheit, making it uninhabitable for life as we know it.
Astronomers have found nine ancient stars near the Milky Way's center, forming before the galaxy existed, with surprising purity and a possible hypernova origin.
Researchers identified ancient stars in the Milky Way's center with extremely low metal content, suggesting they formed in the early universe. These stars contain chemical fingerprints indicating possible hypernova deaths, which could aid understanding of the Universe's evolution over billions of years.
Astronomers have identified a type of gas found in galaxy voids that appears to fuel star formation under certain conditions. Researchers used radio telescopes to measure atomic gas levels in galaxies with gamma-ray bursts, finding large amounts of the gas near these events.
Astronomers have discovered an adolescent protostar, CARMA-7, exhibiting rapid-fire growth spurts and intermittent jets streaming away from its poles. This finding provides insights into chaotic stellar formation in the densely packed Serpens South star cluster.
A new study suggests that disk gaps may be a cosmic illusion and not necessarily caused by hidden planets. The researchers used models to show that growth, migration, and destruction of small particles can create apparent gaps in the disk.
Scientists have simulated 3D exotic clouds on GJ1214b, an exoplanet with a flat spectrum that indicates high-altitude clouds or haze in its atmosphere. The clouds could be of salt and are thought to form deep in the atmosphere before rising into the upper atmosphere.
A team of astronomers has used data from the VVV survey to discover a previously unknown component of our home galaxy, the Milky Way. The new component is a thin disc of young stars across the galactic bulge, which was buried behind thick clouds of dust.
Researchers observe closest tidal disruption event in nearly a decade, gaining new understanding of black hole effects on nearby stars. The study reveals details about the formation of an accretion disk and the expulsion of gas from the black hole.
Researchers using ALMA telescope detected a burst of new stars in seven distant galaxies nine billion years ago. The galaxies' gas content was already depleted despite high rates of star formation, suggesting an increase in efficiency above the main sequence. This study pushes galaxies at z~1.6 well-above the star-forming main sequence.
Astronomers have discovered fast-moving wave-like features in the debris disc of star AU Microscopii, which could be a sign of something unusual. The ripples are racing away from the star at speeds of up to 40,000 kilometers per hour, making them unlike anything ever observed before.
Researchers discovered massive dead galaxies with stellar content similar to local elliptical galaxies, revealing the formation and evolution of massive galaxies. The team found progenitors of these dead galaxies when they were forming stars at an earlier cosmic epoch, uncovering a consistent picture of galaxy history.
Researchers propose a new technique to detect stars at galactic center by looking for radio waves from supersonic stars. Stars with high speeds can create shock waves, producing radio emission that can be detected.
Researchers used the Atacama Large Millimeter/submillimeter Array (ALMA) to locate compact regions within the nearby dwarf irregular galaxy Wolf--Lundmark--Melotte that can emulate larger galaxies' star-forming environments. These discoveries shed light on how dense star clusters can form in low-density, gas-poor galaxies.
Researchers found nearly 10 times more faint, early galaxies than previously detected in deep Hubble surveys. They used a new statistical method to parse out signals from noise in the images.
Astronomers have developed a new technique to measure distances between stars with far greater precision than existing methods. By analyzing the spectra of identical 'stellar twins', researchers can determine the distance between two stars without relying on models, which are often inaccurate.
Researchers have observed a massive transformation in galaxy structure, with disc-shaped galaxies becoming oval-shaped galaxies. The study provides the first direct evidence of this 'metamorphosis' and sheds light on the processes that caused it.
A new study proposes that if life can travel between stars through panspermia, it would spread in a characteristic pattern, creating clusters of life-forms. These clusters could resemble bubbles in a pot of boiling water, growing and overlapping with each other.
Astronomers using Gemini Observatory's new Planet Imager have probed a newly discovered world in unprecedented detail. The planet, 51 Eridani b, is about two times the mass of Jupiter and features a Solar System-like atmosphere with methane detection.
Astronomers have discovered a self-regulating cycle between black holes, jets, and newborn stars in giant elliptical galaxies. The process, observed using Hubble Space Telescope data, controls the rate of star formation by heating and cooling gas halos around these galaxies.
Astronomers have detected a self-regulating cycle of star births within elliptical galaxies, with black holes controlling the rate of gas cooling and star formation. The unique capabilities of space telescopes like Hubble allowed researchers to directly observe 'showers' of star formation linked to galaxy jets.
Astronomers using the Subaru Telescope's Hyper Suprime-Cam camera observed deep, super-wide-field images of the galaxies and their populations of young stars. The team discovered that the spatial distribution of young stars around these galaxies follows closely that of their distribution of neutral hydrogen.
Researchers at the University of York have revealed a new understanding of nucleosynthesis in stars, providing insight into massive star evolution and the origins of the Solar System. By studying radioactive aluminium production, scientists can now better understand gamma radiation maps of the galaxy and simulate star behavior.
Researchers have detected lithium in material ejected by a nova, resolving a long-standing puzzle about its abundance in young stars. The finding sheds light on the chemical evolution of the Milky Way and could inform models of the Big Bang.
A team of astronomers using ALMA has detected the faint glow of ionised carbon in a galaxy just over 800 million years after the Big Bang. This finding reveals new details about the assembly of galaxies in the early universe and provides valuable information on the interstellar medium and star formation processes.
The Breakthrough Prize Foundation has committed $100 million to UC Berkeley and other institutions to lead a comprehensive scientific search for extraterrestrial intelligence. The initiative, called Breakthrough Listen, will utilize radio and optical telescopes to gather and analyze data from the universe.
A study of over 20,000 merging galaxies found that when two galaxies collide, the larger one can stop the smaller one from forming new stars. However, when two galaxies of similar mass collide, they both increase their stellar birth rate.
Astronomers discover active galactic nuclei (AGN) exhibit flickering behavior, switching on and off every 200,000 years. This phenomenon affects star formation in host galaxies, with radiation from AGN potentially delaying or preventing the collapse of gas clouds.
Researchers discover a giant cloud of hydrogen gas being burnt off from the atmosphere of GJ 436b, an exoplanet orbiting a warm red dwarf star. The cloud forms a comet-like tail as ultraviolet light pushes hydrogen into spiral motion, with 1000 metric tonnes being lost every second.
Researchers use ALMA to observe dust contents of galaxies at redshift 5-6, revealing a new evolutionary stage. Average-sized galaxies contain less dust than expected, suggesting a previously unseen transition from gas to the first generation of galaxies.
Astronomers have solved a mystery over blue hook stars, which form when a star's outer layers are destroyed by rapid rotation. The international team found that these stars consume hydrogen fuel more slowly due to their high spin rates.
Researchers have discovered more than 800 'ultra dark galaxies' in the Coma Cluster, which are characterized by their diffuse and extended structure. The galaxies are thought to be enveloped by a massive amount of dark matter, which accounts for over 99% of their total mass.
Astronomers have successfully commissioned a new type of optic that can reveal the image of an exoplanet next to its parent star. The vector-APP coronagraph uses advanced liquid crystal technology to cancel out starlight, allowing fainter planets to be imaged.
A team of European scientists has discovered a unique region of extreme star formation, known as the 'Eye of Medusa', using the powerful NOEMA radio telescope. The discovery reveals a giant region of recently formed massive stars at the center of the galaxy collision.
A team of astronomers has discovered a massive star cluster in the NGC 5253 dwarf galaxy, containing over 7,000 massive O-type stars. The cluster, dubbed Cloud D, is incredibly efficient at forming stars and creating dust, with a gas cloud rate that is ten times greater than in our own Milky Way.
A Queen's University PhD student is conducting the first systematic population study of magnetosphere-host stars, finding that plasma density within all such magnetospheres is far lower than predicted. This suggests that plasma might be escaping gradually, maintaining magnetospheres in an essentially steady state.
A team of astronomers discovered a spiral galaxy devouring a nearby compact dwarf galaxy and found remnants of previous galactic snacks. The study used ground and space-based telescopes to measure chemical enrichment in the gas across the entire face of NGC 1512.
Astronomers find water formation may have occurred less than a billion years after the Big Bang, when the universe was 5% of its current age. This discovery raises important questions about the habitability of the first planets and the origin of life.
A study published in Nature found that galaxies are being strangled to death due to a lack of raw materials needed to form new stars. The team analyzed metal levels in over 26,000 galaxies and found that dead galaxies have higher metal content than alive ones.
Researchers discovered daily weather cycles on six exoplanets, with cloudy mornings and hot afternoons, using sensitive Kepler observations. The study found that winds transport clouds to the day side, heating them up and dissipating them, resulting in clear skies during the afternoon.
Scientists from Berkeley Lab and University of Hawaii at Manoa recreated conditions around carbon-rich stars to find formation pathways of nitrogen-containing molecules. They successfully synthesized quinolone and isoquinoline in hot environments, which could lead to the creation of biorelevant molecules such as nucleobases.
Astronomers observed 22 massive elliptical galaxies using the VLT and Hubble Space Telescope, revealing that star formation in their centers stopped around three billion years ago. The newly discovered inside-out nature of this shutdown may be due to a galaxy's central supermassive black hole or lack of fresh gas.
A team of scientists using NASA's WISE observatory has found no evidence of advanced extraterrestrial life in 100,000 galaxies. The study searched for signs of highly advanced civilizations in mid-infrared wavelengths, a radiation detectable by the satellite.
Astronomers studied 72 large cluster collisions using Hubble and Chandra observations. They found dark matter continues straight through collisions without slowing down, interacting even less with itself than previously thought.
Researchers found a mysterious warm layer at altitudes of 90-100 km on Venus' night side, 20-40 degrees warmer than predicted. This anomaly may be connected to the ozone layer and could be caused by chemical reactions involving chlorine-based substances.
A study by University of Maryland scientists has found a functional link between supermassive black holes and molecular outflows in galaxies. The research suggests that the black holes' winds are powerful enough to drive these massive outflows, which remove star-making gas and shape the galaxy's fate.
Researchers found two ancient stars in Sculptor dwarf galaxy with unusual chemical content, suggesting a single supernova explosion may have seeded the gas cloud. This discovery provides an unprecedented view of the earliest history of another galaxy.