Current Astronomers News and Events

Current Astronomers News and Events, Astronomers News Articles.
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New Hubble data explains missing dark matter
New data from the NASA/ESA Hubble Space Telescope provides further evidence for tidal disruption in the galaxy NGC 1052-DF4. This result explains a previous finding that this galaxy is missing most of its dark matter. By studying the galaxy's light and globular cluster distribution, astronomers have concluded that the gravity forces of the neighbouring galaxy NGC 1035 stripped the dark matter from NGC 1052-DF4 and are now tearing the galaxy apart. (2020-11-26)

Rapid-forming giants could disrupt spiral protoplanetary discs
Giant planets that developed early in a star system's life could solve a mystery of why spiral structures are not observed in young protoplanetary discs, according to a new study by University of Warwick astronomers. (2020-11-26)

Galaxy encounter violently disturbed Milky Way, study finds
The long-held belief that the Milky Way, the galaxy containing Earth and the solar system, is relatively static has been ruptured by fresh cosmic insight. The spiral-shaped disc of stars and planets is being pulled, twisted and deformed with extreme violence by the gravitational force of a smaller galaxy - the Large Magellanic Cloud (LMC). (2020-11-23)

Astronomers' success: seven new cosmic masers
The astronomers from Toru?, Poland have successfully completed the survey of the Milky Way plane. They searched for gas clouds, where there was a maser reinforcement of the OH molecule. They saw seven new sources - each of them brings scientists closer to the process by which massive stars are born. - It is like listening to the buzzing of a mosquito during a loud concert - backstage observations are recapitulated by Prof. Anna Bartkiewicz. (2020-11-18)

Image release: Galaxies in the Perseus Cluster
New VLA images show how the crowded environment of a cluster of galaxies affects the individual galaxies, helping astronomers better understand some of the complex details of such an environment. (2020-11-12)

Radioactive elements may be crucial to the habitability of rocky planets
The amount of long-lived radioactive elements incorporated into a rocky planet as it forms may be a crucial factor in determining its future habitability. That's because internal heating from the radioactive decay of the heavy elements thorium and uranium drives plate tectonics and may be necessary for the planet to generate a magnetic field. Earth's magnetic field protects the planet from solar winds and cosmic rays. (2020-11-10)

FAST reveals mystery of fast radio bursts from the universe
The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) has revealed some mystery of the fast radio bursts, according to a study published in Nature on Oct. 28. (2020-11-04)

Galaxies in the very early universe were surprisingly mature
Massive galaxies were already much more mature in the early universe than previously expected. This is the conclusion of an international team of astronomers who studied distant galaxies with the Atacama Large Millimeter/submillimeter Array (ALMA). The result is now published by the National Radio Astronomy Observatory. (2020-10-30)

Stars and skulls: New ESO image reveals eerie nebula
This ethereal remnant of a long dead star, nestled in the belly of The Whale, bears an uneasy resemblance to a skull floating through space. Captured in astounding detail by ESO's Very Large Telescope (VLT), the eerie Skull Nebula is showcased in this new image in beautiful bloodshot colours. This planetary nebula is the first known to be associated with a pair of closely bound stars orbited by a third outer star. (2020-10-30)

An Earth-sized rogue planet discovered in the Milky Way
Our Galaxy may be teeming with rogue planets, gravitationally unbound to any star. An international team of scientists, led by Polish astronomers, has announced the discovery of the smallest Earth-sized free-floating planet found to date. (2020-10-29)

Galaxies in the infant universe were surprisingly mature
ALMA telescope conducts largest survey yet of distant galaxies in the early universe. (2020-10-27)

Smile, wave: Some exoplanets may be able to see us, too
Three decades after Cornell astronomer Carl Sagan suggested that Voyager 1 snap Earth's picture from billions of miles away - resulting in the iconic Pale Blue Dot photograph - two astronomers now offer another unique cosmic perspective: Some exoplanets - planets from beyond our own solar system - have a direct line of sight to observe Earth's biological qualities from far, far away. (2020-10-21)

ALMA shows volcanic impact on Io's atmosphere
New radio images from ALMA show for the first time the direct effect of volcanic activity on the atmosphere of Jupiter's moon Io. (2020-10-21)

Upgraded GMRT measures the mass of hydrogen in distant galaxies
A team of astronomers from the National Centre for Radio Astrophysics Pune, and the Raman Research Institute (RRI), Bengaluru, has used the upgraded GMRT to measure the atomic hydrogen content of galaxies 8 billion years ago. This is the earliest epoch in the universe for which there is a measurement of the atomic gas content of galaxies. This research has been published in the 14 October 2020 issue of the journal Nature. (2020-10-15)

Low-metallicity globular star cluster challenges formation models
On the outskirts of the nearby Andromeda Galaxy, researchers have unexpectedly discovered a globular cluster (GC) - a massive congregation of relic stars - with a very low abundance of chemical elements heavier than hydrogen and helium (known as its metallicity), according to a new study. (2020-10-15)

Anemic star cluster breaks metal-poor record
In a surprising discovery, astronomers using two Maunakea Observatories - W. M. Keck Observatory and Canada-France-Hawaii Telescope (CFHT) - have found a star cluster in the Andromeda Galaxy that contains a record-breaking low amount of metals, calling into question the so-called 'metallicity-floor' for massive globular star clusters. (2020-10-15)

Modelling extreme magnetic fields and temperature variation on distant stars
New research is helping to explain one of the big questions that has perplexed astrophysicists for the past 30 years - what causes the changing brightness of distant stars called magnetars. Magnetars were formed from stellar explosions or supernovae and they have extremely strong magnetic fields, estimated to be around 100 million, million times greater than the magnetic field found on earth. (2020-10-13)

The puzzle of the strange galaxy made of 99.9% dark matter is solved
At present, the formation of galaxies is difficult to understand without the presence of a ubiquitous, but mysterious component, termed dark matter. Astronomers have measure how much dark matter there is around galaxies, and have found that it varies between 10 and 300 times the quantity of visible matter. However, a few years ago, the discovery of a very diffuse object, named Dragonfly 44, changed this view. (2020-10-13)

Death by spaghettification: Scientists record last moments of star devoured by black hole
A rare blast of light, emitted by a star as it is sucked in by a supermassive black hole, has been spotted by scientists using telescopes from around the world. (2020-10-12)

Studying the sun as a star to understand stellar flares and exoplanets
New research shows that sunspots and other active regions can change the overall solar emissions. The sunspots cause some emissions to dim and others to brighten; the timing of the changes also varies between different types of emissions. This knowledge will help astronomers characterize the conditions of stars, which has important implications for finding exoplanets around those stars. (2020-10-12)

The black hole always chirps twice: New clues deciphering the shape of black holes
A team of gravitational-wave scientists led by the ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) reveal that when two black holes collide and merge, the remnant black hole 'chirps' not once, but multiple times, emitting gravitational waves--intense ripples in the fabric space and time--that inform us about its shape. Today the study has been published in Communications Physics (from the prestigious Nature journal). (2020-10-08)

Vaporized metal in the air of an exoplanet
An international team of researchers led by the National Centre of Competence in Research PlanetS of the University of Bern and the University of Geneva studied the atmosphere of the ultra-hot exoplanet WASP-121b. In it, they found a number of gaseous metals. The results are a next step in the search for potentially habitable worlds. (2020-10-08)

Astronomers turn up the heavy metal to shed light on star formation
Astronomers from The University of Western Australia's node of the International Centre for Radio Astronomy Research (ICRAR) have developed a new way to study star formation in galaxies from the dawn of time to today. Using a new algorithm to model the energy and wavelengths of light coming from almost 7000 nearby galaxies, the researchers succeeded in reconstructing when most of the stars in the Universe formed--in agreement with telescope observations for the first time. (2020-10-06)

Revealing secret of lithium-rich stars by monitoring their heartbeats
A recent study from an international team led by Prof. ZHAO Gang, Prof. SHI Jianrong, and Dr. YAN Hongliang from the National Astronomical Observatories of the Chinese Academy of Sciences (NAOC) found that most lithium-rich stars are the so-called ''red clumps'' rather than the ''red giants'' as previously thought. (2020-10-05)

Hubble observes spectacular supernova time-lapse
The NASA/ESA's Hubble Space Telescope has tracked the fading light of a supernova in the spiral galaxy NGC 2525, located 70 million light years away. Supernovae like this one can be used as cosmic tape measures, allowing astronomers to calculate the distance to their galaxies. Hubble captured these images as part of one of its major investigations, measuring the expansion rate of the Universe, which can help answer fundamental questions about our Universe's very nature. (2020-10-01)

Hubble watches exploding star fade into oblivion
When a star unleashes as much energy in a matter of days as our Sun does in several billion years, you know it's not going to remain visible for long. Like intergalactic paparazzi, NASA's Hubble Space Telescope captured the quick, fading celebrity status of a supernova, the self-detonation of a star. (2020-10-01)

Pair of massive baby stars swaddled in salty water vapor
Using ALMA, astronomers spotted a pair of massive baby stars growing in salty cosmic soup. Each star is shrouded by a gaseous disk which includes molecules of sodium chloride, commonly known as table salt, and heated water vapor. Analyzing the radio emissions from the salt and water, the team found that the disks are counter rotating. It is promising that salt is an excellent marker to explore the immediate surroundings of giant baby stars. (2020-09-25)

Faint orbital debris that threatens satellites not being monitored closely enough, warn astronomers
University of Warwick astronomers are warning that orbital debris posing a threat to operational satellites is not being monitored closely enough, as they publish a new survey finding that over 75% of the orbital debris they detected could not be matched to known objects in public satellite catalogues. (2020-09-24)

Water on exoplanet cloud tops could be found with hi-tech instrumentation
University of Warwick astronomers have shown that water vapour can potentially be detected in the atmospheres of exoplanets by peering literally over the tops of their impenetrable clouds. (2020-09-22)

New technology is a 'science multiplier' for astronomy
A new study has tracked the long-term impact of early seed funding obtained from the National Science Foundation on many key advances in astronomy over the past three decades. (2020-09-21)

VLBA makes first direct distance measurement to magnetar
Using the VLBA, astronomers have made the first direct geometric measurement of the distance to a magnetar. This precision measurement to one of the most magnetic objects in the Universe could help scientists determine if such objects are responsible for generating the mysterious Fast Radio Bursts. (2020-09-18)

Climate change impacts astronomical observations
Already, climate change is having an impact on the conditions of space observation at the Very Large Telescope in the Atacama Desert. In future, new telescopes will have to be adapted to the expected changes, a study in 'Nature Astronomy' finds. (2020-09-17)

Research reveals an enormous planet quickly orbiting a tiny, dying star
Thanks to a bevy of telescopes in space and on Earth -- and even a pair of amateur astronomers in Arizona -- a University of Wisconsin-Madison astronomer and his colleagues have discovered a Jupiter-sized planet orbiting at breakneck speed around a distant white dwarf star. (2020-09-16)

HKU's Laboratory for Space Research member co-discovers first planet found around white dwarf star
An international team of astronomers led by the University of Wisconsin-Madison, including NASA co-authors, and Thomas G. KAYE from HKU's Laboratory for Space Research (LSR), and the Raemor Vista Observatory, has reported what may be the first example of an intact planet closely orbiting a white dwarf, a dense leftover of a Sun-like star that is only 40% bigger than Earth. The team has recently published their findings in Nature. (2020-09-16)

Hints of life on Venus
An international team of astronomers, led by Professor Jane Greaves of Cardiff University, today announced the discovery of a rare molecule - phosphine - in the clouds of Venus. On Earth, this gas is only made industrially, or by microbes that thrive in oxygen-free environments. The detection of phosphine molecules, which consist of hydrogen and phosphorus, could point to extra-terrestrial 'aerial' life. (2020-09-14)

Hubble observations suggest a missing ingredient in dark matter theories
Astronomers have discovered that there may be a missing ingredient in our cosmic recipe of how dark matter behaves. In measuring how dark matter's gravity distorts space, researchers found that small-scale concentrations of dark matter in clusters produce distortions 10 times stronger than expected. This evidence is based on observations of several massive galaxy clusters by Hubble and the European Southern Observatory's Very Large Telescope (VLT) in Chile. (2020-09-10)

Massive halo finally explains stream of gas swirling around the Milky Way
Astronomers at the University of Wisconsin-Madison and their colleagues have discovered that a halo of warm gas surrounding the Magellanic Clouds likely acts as a protective cocoon, shielding the dwarf galaxies from the Milky Way's own halo and contributing most of the Magellanic Stream's mass. (2020-09-09)

Misaligned planet-forming rings around triple young stars
An international team of astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) found a peculiar dust ring system around the young triple star GW Orionis. The system has three large, misaligned rings with sufficient dust for planet formation. The misaligned rings might have been formed by a hidden planet between the rings, which would provide a clue to understand planet formation around a multiple star system. (2020-09-04)

ALMA discovers misaligned rings in planet-forming disk around triple stars
Using ALMA, two teams of astronomers have for the first time discovered a planet-forming disk with misaligned rings around a triple star system, called GW Orionis. (2020-09-03)

Fifty new planets confirmed in machine learning first
Fifty potential planets have had their existence confirmed by a new machine learning algorithm developed by University of Warwick scientists. (2020-08-25)

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