A new study by Dartmouth astronomers has mapped 355 candidate satellite galaxies around dwarf galaxies, tripling the number previously surveyed. The researchers aim to understand how external conditions influence satellite formation and uncover insights into dark matter's nature.
Researchers discovered an unexpectedly complex and dynamic filamentary network within a very-high-velocity cloud (VHVC) in the Milky Way using the FAST telescope. The study found that the cloud is primarily composed of warm neutral medium (WNM), with little or no cold component, suggesting a cleaner, earlier phase in cloud evolution.
A newly discovered interstellar object named 3I/ATLAS is likely to be the oldest comet ever seen, possibly predating our solar system by more than three billion years. The 'water ice-rich' visitor is travelling on a steep path through the galaxy and may be over seven billion years old.
New research predicts the existence of 80-100 additional satellite galaxies surrounding the Milky Way, orbiting at close distances. These 'orphan' galaxies are lost in most simulations but should have survived in the real Universe.
A new type of star-like object, called 'dark dwarfs', could help solve the universe's greatest mystery: dark matter. These objects are powered by dark matter and may be found at the center of our galaxy.
The discovery of dense clouds of neutral hydrogen gas within the Fermi bubbles challenges current understanding of their formation and age. These 'ice-like' clouds are found at 12,000 light years above the Milky Way's center and are much younger than previously estimated.
Researchers discovered high-velocity clouds in the nearby spiral galaxy M83, which moved at speeds significantly different from the galaxy's overall speed of rotation. The findings suggest that these clouds originated outside the galaxy, providing new insights into how galaxies acquire fresh gas and sustain star formation over billions...
Researchers used machine learning to simulate galaxy evolution and supernova explosions, achieving speeds four times faster than supercomputers. This breakthrough enables the study of galaxy origins, including the creation of the Milky Way's elements essential for life.
LHAASO's groundbreaking results unveil a panoramic view of ultrahigh-energy gamma rays within the Milky Way, providing new insights into cosmic ray origins and extreme astrophysical processes. Four new discoveries include star-forming regions, pulsar wind nebulae, and young massive star clusters.
Astronomers have identified thin and thick disks in distant galaxies using JWST images, revealing a consistent trend of sequential disk formation. The study estimates the thin disk formation time for Milky Way-sized galaxies to be around 8 billion years ago.
Researchers have discovered that Bogong moths use constellations of stars and the Milky Way to navigate long distances, making them the first known invertebrate to rely on a stellar compass for navigation. The moths also use the Earth's magnetic field to maintain their direction even when clouds obscure the stars.
Researchers surveyed luminous infrared galaxies to gain insight into galaxy formation in the early universe and possibly the Milky Way. They discovered massive clumps of newborn stars, unlike anything seen in the Milky Way.
Researchers found that the Galactic Center's star-forming regions struggle to form high-mass stars, unlike typical star-forming regions, due to extreme conditions caused by the black hole. The study suggests these regions effectively produce just one generation of stars and lack sufficient material for continued formation.
An international team of astronomers trained a neural network with millions of synthetic simulations and artificial intelligence to tease out new cosmic curiosities about the black hole at the center of our Milky Way. The researchers suspect that the black hole is spinning at nearly top speed, its rotation axis pointing towards the Earth.
A global team tracked an unusual object emitting pulses of radio waves and X-rays lasting two minutes in the Milky Way galaxy. The object, ASKAP J1832-0911, is a long-period transient (LPT) located 15,000 light-years from Earth.
Researchers have found that most Lyman Alpha Emitters (LAEs) are experiencing their first major burst of star formation, revealing crucial insights into galaxy development and the early stages of the universe. The study sheds light on the Milky Way's origin story, providing key information about how galaxies grow and evolve.
Scientists used NASA's Hubble and Gaia space telescopes to simulate the evolution of the Milky Way and Andromeda over 10 billion years. Contrary to previous beliefs, they found a only 2% probability of collision within five billion years.
Researchers use ALMA to observe J0107a, a 'monster' galaxy 11.1 billion years ago. They find similarities with modern galaxies in gas distribution and motion, but higher concentrations and faster gas flow rates.
Researchers find over 500 dense star-forming cores with possible protoplanetary disks in the Milky Way's Central Molecular Zone. Dual-band observations reveal unexpected spectral reddening, suggesting the presence of these early stages of solar system formation.
Researchers discover over 500 dense cores in Milky Way's Central Molecular Zone, which may indicate widespread presence of protoplanetary disks. The findings propose two scenarios: self-absorption of smaller structures within dense cores or growth of dust grains in these systems.
A new computer model simulates magnetism and turbulence in the interstellar medium, providing unprecedented detail on the Milky Way Galaxy's overall magnetic field. The model also helps understand star formation and the propagation of cosmic rays, offering insights into astrophysical phenomenon.
A team of Potsdam researchers has detected infrared signatures of stellar winds from massive stars in the Small Magellanic Cloud galaxy, a satellite of the Milky Way. The study, led by Armin Mang Román, uses James Webb Space Telescope data to analyze the young, massive star cluster NGC 346.
A massive family of over 1000 young stars in the Milky Way has been spotted behaving oddly, moving away from each other at a much faster rate than expected. Using Gaia's vast spectroscopic data, scientists developed a new model to explore and identify these young stars.
Astronomers have discovered a massive spiral galaxy resembling the Milky Way, formed just 1 billion years after the Big Bang. The galaxy, Zhúlóng, exhibits a mature structure with a central old bulge and large star-forming disk, challenging our understanding of galaxy formation.
Researchers found a mature spiral galaxy, Zhúlóng, with a structure similar to the Milky Way's, challenging previous expectations that large disks take billions of years to form. This discovery suggests that spiral arms can develop on shorter timescales and may be short-lived in the early Universe.
Research suggests that massive stars in the Small Magellanic Cloud are being pulled apart by the Large Magellanic Cloud. The discovery reveals a new pattern in stellar motion, which could transform our understanding of galaxy evolution and interactions.
A new database of 400 years of sightings compiled by researchers at Colorado State University may help anticipate when and where milky seas will occur. The archive includes eyewitness reports, satellite data, and individual accounts submitted to the Marine Observer Journal.
Researchers found a high-velocity star ejected from a globular cluster at an extreme velocity of nearly 550 km/s, suggesting the presence of an intermediate-mass black hole. The star's similarities with the cluster's chemical composition and age provide strong evidence for the IMBH's existence.
A new study by UNSW Sydney researchers has discovered the sound frequencies of a cluster of stars 2700 light years away, allowing scientists to map the history of the Milky Way and other galaxies. The discovery uses oscillation frequencies to determine a star's age and mass, providing insights into galaxy formation and evolution.
Scientists studied Sagittarius C using the James Webb Space Telescope to understand why fewer new stars are born in the region. They discovered powerful magnetic field lines that form long, bright filaments of hot hydrogen gas, slowing down star formation.
Astronomers have discovered a cosmic anomaly that challenges our understanding of the universe, revealing a spiral galaxy harboring a supermassive black hole billions of times the Sun's mass. This discovery forces us to rethink how galaxies evolve and how supermassive black holes grow in them.
Researchers from Osaka Metropolitan University used a deep learning model to discover new bubble-like structures in the Milky Way galaxy, providing insights into star formation and galaxy evolution. The study also revealed shell-like structures formed by supernova explosions.
Astronomers have created a detailed 3D map of dust in the Milky Way galaxy, providing new insights into the effects of dust on celestial observations. The map reveals unexpected properties of interstellar dust clouds, including a steepening extinction curve in areas of intermediate density.
Astronomers have discovered entwined dwarf stars emitting radio pulses, challenging the long-held assumption that only neutron stars were responsible for these emissions. The discovery was made using follow-up observations of two stars orbiting each other every two hours.
Researchers found Andromeda XXXV, the smallest and dimmest satellite galaxy to date, which challenges our understanding of galaxy formation and evolution. The discovery provides new insights into how galaxies survive different epochs of the universe.
Astronomers observe an ultra-hot nova, LMC68, using Gemini South's FLAMINGOS-2 instrument, detecting ionized silicon atoms. The signal is unprecedented, shining up to 100 times brighter than the Sun. This is the first near-infrared spectroscopic observation of an extragalactic recurrent nova.
The study reveals a dynamic ecosystem with diverse dwarf galaxies, unlike the Milky Way's smaller satellite system. Hubble's observations provide insights into how small-galaxy growth is affected by massive galaxies like Andromeda.
A team of researchers from Kyushu University discovered that about 60% of molecular clouds in the Small Magellanic Cloud had a filamentary structure, while 40% were 'fluffy' with higher temperatures. This finding provides new insights into star formation in early-universe-like environments.
A Northwestern University-led team observed Sagittarius A*, the Milky Way's supermassive black hole, exhibiting a constant stream of flares with no periods of rest. The level of activity varies widely, from short interludes to long stretches, and appears to be random.
Scientists have discovered a distant, two-lobed radio jet that spans an astonishing 200,000 light-years at least, twice the width of the Milky Way. The team used a combination of telescopes to detect the jet and measure its properties, including the mass of the quasar producing it.
The Hubble Space Telescope has captured a panoramic view of the Andromeda Galaxy, unveiling hundreds of millions of stars and providing new clues to its evolutionary history. The galaxy's unique structural features, such as coherent streams of stars, suggest a more active recent star formation and interaction history than the Milky Way.
Researchers led by Kristen McQuinn used the Webb Telescope to find that Leo P formed stars early on but stopped for a few billion years during the Epoch of Reionization. The study provides insights into the growth of low-mass structures and the processes that led to star creation.
The Hubble Space Telescope has completed a comprehensive survey of the Andromeda galaxy, revealing its structure and evolution on a holistic scale. The observations provide insights into the galaxy's age, heavy-element abundance, and stellar masses, helping astronomers distinguish between competing scenarios of merger history.
Astronomers discovered three ultra-faint dwarf galaxies in an isolated region of space, containing only very old stars. The findings support the theory that events in the early universe cut off star formation in small galaxies.
Edwin Hubble discovered a new universe by analyzing the brightness of stars, revealing that our galaxy is just one of billions in the universe. His findings showed that galaxies move away from each other at faster speeds with greater distances.
Researchers have discovered three tiny ultra-faint dwarf galaxies, dubbed 'stellar-ghost-town' galaxies, with minimal gas and old stars. This suggests that their star formation was cut off early in the universe's history due to insufficient gravity or events like reionization or supernovae explosions.
The James Webb Space Telescope has observed 17 carbon-rich dust shells expanding at regular intervals from two massive stars in the Milky Way galaxy. The dust shells are racing away from the stars at speeds of over 1,600 miles per second and have persisted for over 130 years.
Researchers found a core-collapsing self-interacting dark matter subhalo is responsible for the peculiar spur and gap features observed in the GD-1 stellar stream. This discovery provides insights into the nature of dark matter itself and offers a new explanation for the observed perturbations.
A team of physicists and astronomers found that the Universe is expanding in a more varied way than previously thought, making dark energy unnecessary. The new evidence supports the timescape model of cosmic expansion, which attributes differences in stretching light to calibration issues rather than dark energy.
Astronomers from Wellesley College have discovered a newly forming galaxy that resembles a young Milky Way, with 10 distinct star clusters forming at different times. The galaxy, dubbed the 'Firefly Sparkle', has a mass similar to the Milky Way's when it was in its early stages of development.
Researchers used pulsar accelerations and stellar velocities to determine the presence of a cluster of stellar mass black holes at the centre of Omega Centauri. The study refines understanding of the formation of these intermediate-mass black holes, which could bridge the gap between stellar and supermassive black holes.
Researchers have observed a rare metal-poor supernova, providing valuable information about the early universe. The study revealed that this supernova was distinct from others in nearby galaxies, with unique properties such as a steady brightness period and rapid spin.
Scientists have imaged a star outside our galaxy for the first time, using ESO's Very Large Telescope Interferometer. The star, WOH G64, is a red supergiant in its last stages before becoming a supernova, and the image shows a unique egg-shaped cocoon of gas and dust surrounding it.
A nearby supernova explosion could produce gamma rays that pinpoint the mass of a key dark matter candidate, the axion. The Fermi Gamma-ray Space Telescope would need to be in position to detect these gamma rays within 10 seconds of the supernova's core collapse.
Researchers discovered a class of unusually large and red galaxies, called Ultra-red Flattened Objects (UFOs), near the limit of Hubble's observable range. The James Webb Space Telescope's infrared capabilities allowed them to spot these 'dustier cousins' of the Milky Way.
An international team led by UNIGE has identified three ultra-massive galaxies forming at unexpected speeds in the early Universe. The discovery challenges existing galaxy formation models and suggests that massive galaxies may have been more efficient in building stars than previously thought.
An international team discovered three ultra-massive galaxies, each nearly as massive as the Milky Way, forming at unexpected speeds. The findings indicate that star formation in the early Universe was more efficient than previously thought, posing a challenge to existing galaxy formation models.
Researchers from DTU have discovered a neutron star that rotates at an astonishing 716 times per second, making it one of the fastest-spinning objects ever observed. The neutron star is part of an X-ray binary star system and is located in the Sagittarius constellation.
Astronomers have detected the most distant Milky-Way-like galaxy, REBELS-25, with a rotation and structure similar to our own galaxy. The galaxy is estimated to be 700 million years old, challenging current understanding of galaxy formation.
A new study identifies regions where gravity dominates, such as the Sloan Great Wall and Shapley Supercluster, suggesting that our Milky Way likely resides in the larger Shapley basin. The research provides an unprecedented look into the gravitational landscape of the local Universe.