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Astronomy News -- ScienceDaily
Astronomy news. New! Earth-like extrasolar planet found; double helix nebula; supermassive black holes, astronomy articles, astronomy pictures. Updated daily.
Projectile cannon experiments show how asteroids can deliver water
Mittwoch, 25.04.2018, 22:20:42 Uhr
New research shows that a surprising amount of water survives simulated asteroid impacts, a finding that may help explain how asteroids deposit water throughout the solar system.
Assembly of massive galaxy cluster witnessed for the first time
Mittwoch, 25.04.2018, 19:18:48 Uhr
For the first time, astronomers have witnessed the birth of a colossal cluster of galaxies. Their observations reveal at least 14 galaxies packed into an area only four times the diameter of the Milky Way's galactic disk. Computer simulations of the galaxies predict that over time the cluster will assemble into one of the most massive structures in the modern universe.
To see the first-born stars of the universe
Mittwoch, 25.04.2018, 18:02:56 Uhr
ASU-led team aims to use new NASA space telescope to capture light from the first stars to be born in the universe.
Molecular evolution: How the building blocks of life may form in space
Mittwoch, 25.04.2018, 18:02:17 Uhr
In an experiment that mimics astrophysical conditions, with cryogenic temperatures in an ultrahigh vacuum, scientists used an electron gun to irradiate thin sheets of ice covered in basic molecules of methane, ammonia and carbon dioxide, the building blocks of life. The experiment tested how the combination of electrons and basic matter leads to more complex biomolecule forms -- and perhaps eventually to life forms.
Milky Way's supermassive black hole may have 'unseen' siblings
Dienstag, 24.04.2018, 19:36:01 Uhr
Astronomers predict that galaxies with a mass similar to the Milky Way should host several supermassive black holes.
Uncovering the secret law of the evolution of galaxy clusters
Dienstag, 24.04.2018, 15:37:11 Uhr
Using observational data from the Hubble Space Telescope and the Subaru Telescope, the size and mass of galaxy clusters have precisely been measured. The research team analyzed those data and found a simple law that regulates the growth of the clusters. They also showed that the clusters are still young and growing. The newfound law will serve as a tool to clarify the evolutionary history of clusters and the universe.
'Face recognition' for galaxies: Artificial intelligence brings new tools to astronomy
Montag, 23.04.2018, 18:51:15 Uhr
A machine learning method called 'deep learning,' which has been widely used in face recognition and other image- and speech-recognition applications, has shown promise in helping astronomers analyze images of galaxies and understand how they form and evolve. In a new study, researchers used computer simulations of galaxy formation to train a deep learning algorithm, which then proved surprisingly good at analyzing images of galaxies from the Hubble Space Telescope.
Galaxies grow bigger and puffier as they age
Montag, 23.04.2018, 18:50:41 Uhr
A new international study has found that galaxies grow bigger and puffier as they age.
Vast stellar nursery of Lagoon Nebula
Donnerstag, 19.04.2018, 19:09:30 Uhr
This colorful cloud of glowing interstellar gas is just a tiny part of the Lagoon Nebula, a vast stellar nursery. This nebula is a region full of intense activity, with fierce winds from hot stars, swirling chimneys of gas, and energetic star formation all embedded within a hazy labyrinth of gas and dust.
NASA planet hunter on its way to orbit
Donnerstag, 19.04.2018, 16:57:26 Uhr
NASA's Transiting Exoplanet Survey Satellite (TESS) launched on the first-of-its-kind mission to find worlds beyond our solar system, including some that could support life. Researchers will use spectroscopy to determine a planet's mass, density and atmospheric composition. Water, and other key molecules, in its atmosphere can give us hints about a planets' capacity to harbor life.
Optimizing space travel efficiency
Donnerstag, 19.04.2018, 01:43:07 Uhr
Sending a human into space and doing it efficiently presents a galaxy of challenges. Scientists have explored ways to integrate the logistics of space travel by looking at a campaign of lunar missions, spacecraft design, and conducting research, to create a framework to optimize fuel and other resources.
Meteorite diamonds tell of a lost planet
Mittwoch, 18.04.2018, 20:48:10 Uhr
Scientists have examined a slice from a meteorite that contains large diamonds formed at high pressure. The study shows that the parent body from which the meteorite came was a planetary embryo of a size between Mercury and Mars.
Black hole and stellar winds form giant butterfly, shut down star formation in galaxy
Mittwoch, 18.04.2018, 20:15:17 Uhr
Researchers have completed an unprecedented 'dissection' of twin galaxies in the final stages of merging. The new study explores a galaxy called NGC 6240. While most galaxies in the universe hold only one supermassive black hole at their center, NGC 6240 contains two -- and they're circling each other in the last steps before crashing together.
Martian moons model indicates formation following large impact
Mittwoch, 18.04.2018, 20:15:14 Uhr
Scientists posit a violent birth of the tiny Martian moons Phobos and Deimos, but on a much smaller scale than the giant impact thought to have resulted in the Earth-moon system. Their work shows that an impact between proto-Mars and a dwarf-planet-sized object likely produced the two moons.
340,000 stars' 'DNA' interrogated in search for sun's lost siblings
Mittwoch, 18.04.2018, 15:20:55 Uhr
Astronomers have revealed the 'DNA' of more than 340,000 stars in the Milky Way, which should help them find the siblings of the sun, now scattered across the sky. This is the first major announcement of an ambitious survey as part of a quest to uncover the formulation and evolution of galaxies -- after the Australian-led Galactic Archaeology survey, called GALAH, commenced three years ago.
Can we tell black holes apart?
Dienstag, 17.04.2018, 17:57:21 Uhr
Astrophysicists have created and compared self-consistent and realistic images of the shadow of an accreting supermassive black hole. The goal was to test if Einsteinian black holes can be distinguished from those in alternative theories of gravity.
Looking for extrasolar planets: DARKNESS lights the way
Dienstag, 17.04.2018, 00:56:25 Uhr
An international team of scientists has developed a new instrument to detect planets around the nearest stars. It is the world's largest and most advanced superconducting camera.
Once upon a time, an exoplanet was discovered
Montag, 16.04.2018, 18:16:21 Uhr
In recent history, a very important achievement was the discovery, in 1995, of 51 Pegasi b, the first extrasolar planet ever found around a normal star other than the Sun.
An astrophysicist is unlocking the secrets to dark matter
Montag, 16.04.2018, 18:15:33 Uhr
New research examines an interesting light source that was captured by four different telescopes each pointing in a different direction in the sky.
Hubble catches a colossal cluster
Freitag, 13.04.2018, 19:34:56 Uhr
This NASA/ESA Hubble Space Telescope image shows a massive galaxy cluster glowing brightly in the darkness.
Circumbinary castaways: Short-period binary systems can eject orbiting worlds
Donnerstag, 12.04.2018, 19:08:02 Uhr
Planets orbiting 'short-period' binary stars, or stars locked in close orbital embrace, can be ejected off into space as a consequence of their host stars' evolution, according to new research.
Fascinating zoo of discs discovered around young stars
Mittwoch, 11.04.2018, 17:11:06 Uhr
New images from the SPHERE instrument on ESO's Very Large Telescope are revealing the dusty discs surrounding nearby young stars in greater detail than previously achieved. They show a bizarre variety of shapes, sizes and structures, including the likely effects of planets still in the process of forming.
Tiny distortions in universe's oldest light reveal strands in cosmic web
Dienstag, 10.04.2018, 19:27:03 Uhr
Scientists have decoded faint distortions in the patterns of the universe's earliest light to map huge tubelike structures invisible to our eyes -- known as filaments -- that serve as superhighways for delivering matter to dense hubs such as galaxy clusters.
Outback radio telescope listens in on interstellar visitor
Dienstag, 10.04.2018, 16:09:53 Uhr
A telescope in outback Australia has been used to listen to a mysterious cigar-shaped object that entered our Solar System late last year. When 'Oumuamua was first discovered, astronomers thought it was a comet or an asteroid from within the Solar System. But after studying its orbit and discovering its long, cylindrical shape, they realised 'Oumuamua was neither and had come from interstellar space.
The largest catalog ever published of very high energy gamma ray sources in the galaxy
Montag, 09.04.2018, 16:38:43 Uhr
Astronomers have published the results of 15 years of gamma ray observations of the Milky Way. Its telescopes installed in Namibia have studied populations of pulsar wind nebulae and supernova remnants, as well as microquasars, never before detected in gamma rays.
Hunting for dark matter in the smallest galaxies in the Universe
Freitag, 06.04.2018, 15:17:58 Uhr
Astrophysicists have created a new method to measure the amount of dark matter at the center of tiny “dwarf” galaxies.
Giant solar tornadoes put researchers in a spin
Freitag, 06.04.2018, 04:34:10 Uhr
Despite their appearance solar tornadoes are not rotating after all, according to a team of scientists. A new analysis of these gigantic structures, each one several times the size of the Earth, indicates that they may have been misnamed because scientists have so far only been able to observe them using 2-dimensional images.
Dark matter might not be interactive after all
Freitag, 06.04.2018, 04:34:07 Uhr
Astronomers are back in the dark about what dark matter might be, after new observations showed the mysterious substance may not be interacting with forces other than gravity after all.
Dead star circled by light
Donnerstag, 05.04.2018, 18:03:29 Uhr
New images reveal a rich landscape of stars and glowing clouds of gas in one of our closest neighboring galaxies, the Small Magellanic Cloud. The pictures have allowed astronomers to identify an elusive stellar corpse left behind by a 2,000-year-old supernova explosion. The MUSE instrument was used to establish where this object is hiding, and Chandra X-ray Observatory data confirmed its identity as an isolated neutron star.
Paucity of phosphorus hints at precarious path for extraterrestrial life
Donnerstag, 05.04.2018, 15:33:10 Uhr
Work by astronomers suggests there may be a cosmic lack of a chemical element essential to life.
Tens of thousands of black holes may exist in Milky Way's center
Mittwoch, 04.04.2018, 19:35:32 Uhr
Astrophysicists have discovered a dozen black holes gathered around Sagittarius A* (Sgr A*), the supermassive black hole in the center of the Milky Way Galaxy. The finding is the first to support a decades-old prediction, opening up myriad opportunities to better understand the universe.
Hubble makes the first precise distance measurement to an ancient globular star cluster
Mittwoch, 04.04.2018, 19:34:47 Uhr
Astronomers have for the first time precisely measured the distance to one of the oldest objects in the universe, a collection of stars born shortly after the big bang.
From car engines to exoplanets
Mittwoch, 04.04.2018, 17:47:07 Uhr
Chemical models developed to help limit the emission of pollutants by car engines are being used to study the atmospheres of hot exoplanets orbiting close to their stars.
Magnetic hot spots on neutron stars survive for millions of years
Mittwoch, 04.04.2018, 15:39:38 Uhr
A study of the evolution of magnetic fields inside neutron stars shows that instabilities can create intense magnetic hot spots that survive for millions of years, even after the star's overall magnetic field has decayed significantly.
Astrophysicists map the infant universe in 3-D and discover 4,000 early galaxies
Mittwoch, 04.04.2018, 15:39:35 Uhr
Astronomers have announced one of the largest 3-D maps of the infant universe.
Artificial intelligence helps predict likelihood of life on other worlds
Mittwoch, 04.04.2018, 15:39:14 Uhr
Developments in artificial intelligence may help us to predict the probability of life on other planets. The study uses artificial neural networks (ANNs) to classify planets into five types, estimating a probability of life in each case, which could be used in future interstellar exploration missions.
Anticipating the dangers of space
Dienstag, 03.04.2018, 20:03:48 Uhr
Astronauts and future space tourists face risks from radiation, which can cause illness and injure organs. Researchers used supercomputers to investigate the radiation exposure related to the Manned Orbital Laboratory mission, planned for the 1960s and 70s, during which a dangerous solar storm occurred. They also explored the historical limitations of radiation research and how such limitations could be addressed in future endeavors.
Deep inside Perseus A – A telescope larger than the Earth makes a sharp image of the formation of black hole jets in the core of a radio galaxy
Dienstag, 03.04.2018, 15:00:46 Uhr
Researchers have imaged newly forming jets of plasma from a massive black hole with unprecedented accuracy. Radio images made with a combination of telescopes in space and on the ground resolve the jet structure merely a couple of hundred black hole radii or 12 light days from its launching site.
X-rays could sterilize alien planets in (otherwise) habitable zones
Dienstag, 03.04.2018, 01:28:19 Uhr
Intense radiation could strip away the ozone layer of Earth-like planets around other stars and render them uninhabitable, according to a new study.
Gravitational waves created by black holes in the cenetr of most galaxies
Dienstag, 03.04.2018, 01:28:17 Uhr
Gravitational waves may be forged in the heart of the galaxy, says a new study.
First age-map of the heart of the Milky Way
Dienstag, 03.04.2018, 01:27:03 Uhr
The first large-scale age-map of the Milky Way shows that a period of star formation lasting around 4 billion years created the complex structure at the heart of our galaxy.
Astronomers find 72 bright and fast explosions
Dienstag, 03.04.2018, 01:26:57 Uhr
Gone in a (cosmological) flash: a team of astronomers found 72 very bright, but quick events in a recent survey and are still struggling to explain their origin.
Is the Milky Way getting bigger?
Dienstag, 03.04.2018, 01:26:51 Uhr
The galaxy we inhabit, the Milky Way, may be getting even bigger, according to new research.
NASA survey seen as steppingstone for astronomy
Montag, 02.04.2018, 22:06:24 Uhr
By studying dust in the habitable zones of nearby stars, the HOSTS Survey is helping to determine how big future telescopes should be, which stars are likely candidates for harboring Earth-like planets and what the average star system looks like.
Cosmic lens helps Hubble capture image of most distant star ever seen
Montag, 02.04.2018, 17:07:39 Uhr
Peering through the gravitational lens of a massive galaxy cluster 5 billion light years from Earth, astronomers have discovered a single, blue supergiant star 9 billion light years away, farther than any other normal star seen before. The star, dubbed Icarus, was magnified more than 2,000 times when it passed directly behind a sun-like star in the lensing cluster. This demonstrates a new way of studying stars in the earliest years of the universe.
Is there life adrift in the clouds of Venus?
Freitag, 30.03.2018, 23:13:02 Uhr
In the search for extraterrestrial life, scientists have turned over all sorts of rocks. Mars, for example, has geological features that suggest it once had -- and still has -- subsurface liquid water. Scientists have also eyed Saturn's moons as well as Jupiter's as possible havens for life in the oceans under their icy crusts. Now, however, scientists are dusting off an old idea that promises a new vista in the hunt for life beyond Earth: the clouds of Venus.
Supernova may have 'burped' before exploding
Donnerstag, 29.03.2018, 00:25:02 Uhr
The slow fade of radioactive elements following a supernova allows astrophysicists to study them at length. But the universe is packed full of flash-in-the pan transient events lasting only a brief time, so quick and hard to study they remain a mystery. Only by increasing the rate at which telescopes monitor the sky has it been possible to catch more Fast-Evolving Luminous Transients (FELTs) and begin to understand them.
Dark matter goes missing in oddball galaxy
Mittwoch, 28.03.2018, 19:07:24 Uhr
Galaxies and dark matter go together like peanut butter and jelly. You typically don't find one without the other.
What the first American astronauts taught us about living in space
Dienstag, 27.03.2018, 20:17:07 Uhr
Project Mercury proved that humans could live and work in space, paving the way for all future human exploration.
Newly-discovered planet is hot, metallic and dense as Mercury
Dienstag, 27.03.2018, 19:20:14 Uhr
A hot, metallic, Earth-sized planet with a density similar to Mercury -- situated 339 light years away -- has been detected and characterized by a global team of astronomers.
What interstellar visitor 'Oumuamua can teach us
Dienstag, 27.03.2018, 16:28:11 Uhr
The first interstellar object ever seen in our solar system, named 'Oumuamua, is giving scientists a fresh perspective on how planets, asteroids and comets form.
Hubble solves cosmic 'whodunit' with interstellar forensics
Donnerstag, 22.03.2018, 20:02:12 Uhr
On the outskirts of our galaxy, a cosmic tug-of-war is unfolding-and only NASA's Hubble Space Telescope can see who's winning.
TRAPPIST-1 planets provide clues to the nature of habitable worlds
Dienstag, 20.03.2018, 19:13:20 Uhr
To determine the composition of the TRAPPIST-1 planets, the team used a unique software package that uses state-of-the-art mineral physics calculators. The software, called ExoPlex, allowed the team to combine all of the available information about the TRAPPIST-1 system, including the chemical makeup of the star, rather than being limited to just the mass and radius of individual planets.
A star disturbed the comets of the solar system 70,000 years ago
Dienstag, 20.03.2018, 17:34:55 Uhr
About 70,000 years ago, a small reddish star approached our solar system and gravitationally disturbed comets and asteroids. Astronomers have verified that the movement of some of these objects is still marked by that stellar encounter.
Cosmologists create largest simulation of galaxy formation, break their own record
Montag, 19.03.2018, 17:04:59 Uhr
Cosmology researchers are releasing initial findings from IllustrisTNG, their follow-up to the 2015 record-breaking Illustris simulation -- the largest-ever hydrological simulation of galaxy formation.
Interstellar asteroid, 'Oumuamua, likely came from a binary star system
Montag, 19.03.2018, 17:01:11 Uhr
New research finds that 'Oumuamua, the rocky object identified as the first confirmed interstellar asteroid, very likely came from a binary star system.
Scientists detect radio echoes of a black hole feeding on a star
Montag, 19.03.2018, 16:58:45 Uhr
A scientist has detected radio echoes of a black hole feeding on a star, suggesting black hole emits a jet of energy proportional to the stellar material it gobbles up.
Space radiation more hazardous: Implication sfor astronauts and satellites
Donnerstag, 15.03.2018, 16:06:34 Uhr
It might sound like something from a science fiction plot - astronauts traveling into deep space being bombarded by cosmic rays - but radiation exposure is science fact. As future missions look to travel back to the moon or even to Mars, new research cautions that the exposure to radiation is much higher than previously thought and could have serious implications on both astronauts and satellite technology.
Jupiter's atmospheric beauty is more than skin deep
Donnerstag, 15.03.2018, 14:12:58 Uhr
In the year and a half NASA's Juno spacecraft has been orbiting Jupiter, the scientists have discovered that the orange and white bands that characterize Jupiter's outer atmosphere extend thousands of miles into the gas giant's atmosphere.
Optometrist investigates changes in eye structure in astronauts
Dienstag, 13.03.2018, 18:06:46 Uhr
An optometrist studies the vision of returning International Space Station astronauts and demonstrates a structural change to their eyes.