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1. http://feeds.sciencedaily.com/sciencedaily/space_time/extrasolar_planets  Mi, 22.11.2017 14:08:21  Alles  RSS-Reader Browser
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Inhalt von "http://feeds.sciencedaily.com/sciencedaily/space_time/extrasolar_planets"
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Extrasolar Planets News -- ScienceDaily Extrasolar Planets News -- ScienceDaily
Extrasolar Planet News. Astronomers discover extrasolar planets in a nearby star system. Could extrasolar planets support life? Images, full-text articles. Free.
  • Space dust may transport life between worlds, research suggests
    20.11.2017 17:13:26
    Life on Earth might have originated from tiny organisms brought to our planet in streams of fast-moving space dust, according to a new study.
  • Lava or not, exoplanet 55 Cancri e likely to have atmosphere
    16.11.2017 17:37:43
    Twice as big as Earth, the super-Earth 55 Cancri e was thought to have lava flows on its surface. Now, a new analysis finds this planet likely has an atmosphere whose ingredients could be similar to those of Earth's atmosphere, but thicker.
  • Closest temperate world orbiting quiet star discovered
    15.11.2017 15:17:47
    A temperate Earth-sized planet has been discovered only 11 light-years from the solar system by a team using ESO's unique planet-hunting HARPS instrument. The new world has the designation Ross 128 b and is now the second-closest temperate planet to be detected after Proxima b. It is also the closest planet to be discovered orbiting an inactive red dwarf star, which may increase the likelihood that this planet could potentially sustain life.
  • Red giant star gives a surprising glimpse of the sun's future
    07.11.2017 15:28:30
    Astronomers have for the first time observed details on the surface of an aging star with the same mass as the sun. ALMA's images show that the star is a giant, its diameter twice the size of Earth's orbit around the sun, but also that the star's atmosphere is affected by powerful, unexpected shock waves.
  • Atmospheric beacons guide NASA scientists in search for life
    02.11.2017 17:10:00
    New NASA research proposes a novel approach to sniffing out exoplanet atmospheres. It takes advantage of frequent stellar storms from cool, young dwarf stars to highlight signs of possible life.
  • Overlooked Treasure: The First Evidence of Exoplanets
    01.11.2017 22:54:46
    Mount Wilson is the site where some of the key discoveries about our galaxy and universe were made in the early 20th century. But there is a far lesser known, 100-year-old discovery from Mount Wilson -- one that was unidentified and unappreciated until recently: the first evidence of exoplanets.
  • NASA investigates invisible magnetic bubbles in outer solar system
    01.11.2017 20:12:01
    Forty years ago, the twin Voyagers spacecraft were launched to explore the frontiers of our solar system, and have since made countless discoveries, including finding magnetic bubbles around two of the outer planets.
  • 'Monster' planet discovery challenges formation theory
    31.10.2017 15:51:58
    A giant planet, which should not exist according to planet formation theory, has been discovered around a distant star.
  • Astronomers discover sunscreen snow falling on hot exoplanet
    26.10.2017 19:53:25
    Astronomers have used the Hubble Space Telescope to find a blistering-hot giant planet outside our solar system where the atmosphere 'snows' titanium dioxide -- the active ingredient in sunscreen. These observations are the first detections of this 'snow-out' process, called a 'cold trap,' on an exoplanet. The research provides insight into the complexity of weather and atmospheric composition on exoplanets, and may someday be useful for gauging the habitability of Earth-size planets.
  • Scientists detect comets outside our solar system
    26.10.2017 19:53:16
    Scientists, working closely with amateur astronomers, have spotted the dusty tails of six exocomets -- comets outside our solar system -- orbiting a faint star 800 light years from Earth.
  • New NASA study improves search for habitable worlds
    20.10.2017 00:18:49
    New NASA research is helping to refine our understanding of candidate planets beyond our solar system that might support life.
  • Astronomers find potential solution into how planets form
    13.10.2017 18:32:05
    The quest to discover how planets found in the far reaches of the universe are born has taken a new, crucial twist.
  • Star Dust Helps Explain Mysterious Dimming Star
    13.10.2017 15:19:51
    Astronomers are working to understand the mysterious dimming of Tabby's Star. The astronomers report that space dust orbiting the star -- not alien megastructures -- is the likely cause of the star's long-term dimming.
  • Devourer of planets? Astronomers dub star 'Kronos'
    12.10.2017 18:28:32
    'Kronos' is enhanced in metals and other rock-forming elements but not in volatiles, prompting a team of researchers to conclude that it absorbed as much as 15 Earth masses worth of rocky planets. Its twin, 'Krios,' does not show this unusual pattern of enhancement.
  • Giant exoplanet hunters: Look for debris disks
    11.10.2017 19:52:39
    There's no map showing all the billions of exoplanets hiding in our galaxy -- they're so distant and faint compared to their stars, it's hard to find them. Now, astronomers hunting for new worlds have established a possible signpost for giant exoplanets.
  • The super-Earth that came home for dinner
    04.10.2017 20:45:11
    It might be lingering bashfully on the icy outer edges of our solar system, hiding in the dark, but subtly pulling strings behind the scenes: stretching out the orbits of distant bodies, perhaps even tilting the entire solar system to one side. It is a possible "Planet Nine" -- a world perhaps 10 times the mass of Earth and 20 times farther from the sun than Neptune.
  • ALMA and Rosetta detect Freon-40 in space dashing hopes that molecule may be marker of life
    02.10.2017 17:28:06
    Observations made with the Atacama Large Millimeter/submillimeter Array (ALMA) and ESA's Rosetta mission, have revealed the presence of the organohalogen Freon-40 in gas around both an infant star and a comet. Organohalogens are formed by organic processes on Earth, but this is the first ever detection of them in interstellar space. This discovery suggests that organohalogens may not be as good markers of life as had been hoped, but that they may be significant components of the material from which planets form.
  • Size matters in the detection of exoplanet atmospheres
    19.09.2017 15:26:27
    A group-analysis of 30 exoplanets orbiting distant stars suggests that size, not mass, is a key factor in whether a planet’s atmosphere can be detected. The largest population-study of exoplanets to date successfully detected atmospheres around 16 ‘hot Jupiters’, and found that water vapor was present in every case.
  • Light on exoplanets may be quite different from Earth: Different photosynthesis?
    15.09.2017 23:00:07
    Researchers have proposed a prediction that red-edge could be observed as on the Earth even on exoplanets around M-dwarfs. They pointed out that the first oxgenic photorophs are most likely to have evolved underwater to utilize visible light just like what had happened in the primordial ocean on the Earth. They examined light adaptation mechanisms of visible- and IR-radiation-using phototrophs required for adapting to land habitats and found out that IR-using phototrophs struggle to adapt to changing light condition at the boundary of water and land surface.
  • The return of the comet-like exoplanet
    14.09.2017 21:23:14
    Astronomers have focused the Hubble Space Telescope on an exoplanet that had already been seen losing its atmosphere, which forms an enormous cloud of hydrogen, giving the planet the appearance of a giant comet. During earlier observations, it was not possible to cover the whole cloud, whose shape was predicted by numerical simulations. Thanks to these new observations, the scientists have finally been able to confirm the initial predictions.
  • Hubble observes pitch black planet
    14.09.2017 21:22:33
    Astronomers have discovered that the well-studied exoplanet WASP-12b reflects almost no light, making it appear essentially pitch black. This discovery sheds new light on the atmospheric composition of the planet and also refutes previous hypotheses about WASP-12b's atmosphere. The results are also in stark contrast to observations of another similarly sized exoplanet.
  • Are we being watched? Tens of other worlds could spot the Earth
    09.09.2017 02:55:00
    Scientists have turned exoplanet-hunting on its head, in a study that instead looks at how an alien observer might be able to detect Earth using our own methods. They find that at least nine exoplanets are ideally placed to observe transits of Earth.
  • Climate change for aliens
    07.09.2017 17:24:13
    For more than 50 years, the Kardashev scale has been the gold standard for classifying hypothetical 'exo-civilizations' by their ability to harness energy. A team of researchers has devised a new system that takes into account the impacts of that energy use.
  • Earth as hybrid planet: New classification places Anthropocene era in astrobiological context
    06.09.2017 19:55:41
    A new classification scheme has been devised for the evolutionary stages of worlds based on 'non-equilibrium thermodynamics' -- a planet's energy flow being out of sync, as the presence of life could cause.
  • First hints of possible water content on TRAPPIST-1 planets
    31.08.2017 17:30:18
    Astronomers have been trying to determine whether there might be water on the seven Earth-sized planets orbiting the nearby dwarf star TRAPPIST-1. The results suggest that the outer planets of the system might still harbor substantial amounts of water. This includes the three planets within the habitable zone of the star, lending further weight to the possibility that they may indeed be habitable.
  • Scientists create 'diamond rain' that forms in the interior of icy giant planets
    21.08.2017 17:15:33
    In an experiment designed to mimic the conditions deep inside the icy giant planets of our solar system, scientists were able to observe 'diamond rain' for the first time as it formed in high-pressure conditions. Extremely high pressure squeezes hydrogen and carbon found in the interior of these planets to form solid diamonds that sink slowly down further into the interior.
  • Astrophysicists predict Earth-like planet in star system only 16 light years away
    17.08.2017 17:08:52
    Astrophysicists have predicted that an Earth-like planet may be lurking in a star system just 16 light years away. The team investigated the star system Gliese 832 for additional exoplanets residing between the two currently known alien worlds in this system. Their computations revealed that an additional Earth-like planet with a dynamically stable configuration may be residing at a distance ranging from 0.25 to 2.0 astronomical unit (AU) from the star.
  • Four Earth-sized planets detected orbiting the nearest sun-like star
    17.08.2017 15:55:49
    Astronomers have discovered four Earth-sized planets orbiting the nearest sun-like star, tau Ceti, which is about 12 light years away and visible to the naked eye. These planets have masses as low as 1.7 Earth mass, making them among the smallest planets ever detected around nearby sun-like stars. Two of them are super-Earths located in the habitable zone of the star, meaning they could support liquid surface water.
  • Tidally locked exoplanets may be more common than previously thought
    14.08.2017 22:19:52
    Many exoplanets to be found by coming high-powered telescopes will probably be tidally locked -- with one side permanently facing their host star -- according to new research.
  • Scientists probe Neptune's depths to reveal secrets of icy planets
    11.08.2017 15:37:15
    Scientists have helped solve the mystery of what lies beneath the surface of Neptune -- the most distant planet in our solar system.
  • Exoplanet shines with glowing water atmosphere
    02.08.2017 19:47:48
    Scientists have found compelling evidence for a stratosphere on an enormous planet outside our solar system. The planet's stratosphere -- a layer of atmosphere where temperature increases with higher altitudes -- is hot enough to boil iron.
  • Earth-like atmosphere may not survive Proxima b's orbit
    31.07.2017 22:41:32
    An Earth-like planet outside the solar system may not be able to keep a grip on its atmosphere, leaving the surface exposed to harmful stellar radiation and reducing its potential for habitability.
  • New hot Jupiter marks the first collaborative exoplanet discovery
    18.07.2017 14:52:32
    Researchers have discovered a new 'Hot Jupiter' exoplanet.
  • Smallest-ever star discovered by astronomers
    12.07.2017 04:00:46
    The smallest star yet measured has been discovered by a team of astronomers. With a size just a sliver larger than that of Saturn, the gravitational pull at its stellar surface is about 300 times stronger than what humans feel on Earth.
  • Tracking the birth of a 'super-Earth'
    11.07.2017 15:28:23
    'Synthetic observations' simulating nascent planetary systems could help explain a puzzle -- how planets form -- that has vexed astronomers for a long time.
  • Cosmic barbecue: Researchers spot 60 new 'hot Jupiter' candidates
    06.07.2017 18:12:01
    Sixty potential new 'hot Jupiters' -- highly irradiated worlds that glow like coals on a barbecue grill and are found orbiting only 1% of Sun-like stars -- have been discovered by researchers.
  • First discovery of an exoplanet with SPHERE/VLT
    06.07.2017 13:25:40
    An exoplanet has been discovered by an international team of astronomers by direct imaging using SPHERE, an instrument designed and developed by a consortium of 12 European institutes on the Very Large Telescope ESO, based in Chile. The instrument, which corrects in real time the terrestrial atmospheric turbulences and occults the light of the star, allows to take a real «photography» of the exoplanet.
  • Re-making planets after star-death
    06.07.2017 03:19:14
    Astronomers may have found an answer to the 25-year-old mystery of how planets form in the aftermath of a supernova explosion.
  • Under pressure: Extreme atmosphere stripping may limit exoplanets' habitability
    03.07.2017 14:33:08
    New models of massive stellar eruptions hint at an extra layer of complexity when considering whether an exoplanet may be habitable or not. Models developed for our own Sun have now been applied to cool stars favored by exoplanet hunters.
  • Topsy-turvy motion creates light switch effect at Uranus
    26.06.2017 15:34:53
    Uranus' magnetosphere, the region defined by the planet's magnetic field and the material trapped inside it, gets flipped on and off like a light switch every day as it rotates along with the planet, scientists have discovered. It's 'open' in one orientation, allowing solar wind to flow into the magnetosphere; it later closes, forming a shield against the solar wind and deflecting it away from the planet.
  • The curious case of the warped Kuiper Belt
    22.06.2017 16:40:52
    The plane of the solar system is warped in the belt's outer reaches, signaling the presence of an unknown Mars-to-Earth-mass planetary object far beyond Pluto, according to new research. 
  • Ten near-Earth size planets in habitable zone of their star
    20.06.2017 18:33:31
    NASA's Kepler space telescope team has released a mission catalog of planet candidates that introduces 219 new planet candidates, 10 of which are near-Earth size and orbiting in their star's habitable zone, which is the range of distance from a star where liquid water could pool on the surface of a rocky planet.
  • New branch in family tree of exoplanets discovered
    19.06.2017 18:02:38
    Researchers have classified exoplanets in much the same way that biologists identify new animal species.
  • Search for Earth-like planets: Try a statistical approach
    14.06.2017 15:19:04
    A team of astronomers seeks to change the way scientists approach the search for Earth-like planets orbiting stars other than the sun. They favor taking a statistical comparative approach in seeking habitable planets and life beyond the solar system.
  • Jupiter is one old-timer, scientist finds
    12.06.2017 21:42:20
    Jupiter is the oldest planet in our solar system, an international group of scientists has found.
  • Composition of Earth-size planets in TRAPPIST-1 system
    08.06.2017 20:55:59
    An astrophysics researcher has identified the possible compositions of the seven planets in the TRAPPIST-1 system. Using thousands of numerical simulations to identify the planets stable for millions of years, Quarles concluded that six of the seven planets are consistent with an Earth-like composition. The exception is TRAPPIST-1f, which has a mass of 25 percent water, suggesting that TRAPPIST-1e may be the best candidate for future habitability studies.
  • Mini-flares potentially jeopardize habitability of planets circling red dwarf stars
    06.06.2017 18:33:42
    Solar flares and associated eruptions can trigger auroras on Earth or, more ominously, damage satellites and power grids. Could flares on cool, red dwarf stars cause even more havoc to orbiting planets, even rendering them uninhabitable? To help answer that question, astronomers sought to find out how many flares such stars typically unleash.
  • Hubble's tale of two exoplanets: Nature vs. nurture
    05.06.2017 21:45:23
    Is it a case of nature versus nurture when it comes to two 'cousin' exoplanets? In a unique experiment, scientists used NASA's Hubble Space Telescope to study two 'hot Jupiter' exoplanets. Because these planets are virtually the same size and temperature, and orbit around nearly identical stars at the same distance, the team hypothesized that their atmospheres should be alike. What they found surprised them.
  • A planet hotter than most stars
    05.06.2017 17:09:26
    A newly discovered Jupiter-like world is so hot that it’s stretching the definition of the word “planet.”
  • Surface gravity on many exoplanets similar to that of Earth, study finds
    01.06.2017 15:55:21
    A recent statistical study has revealed that exoplanets with a mass of between 1 and 100 times the mass of Earth have a surface gravity surprisingly similar to terrestrial gravity.
  • Giant ringed planet likely cause of mysterious eclipses
    31.05.2017 15:25:04
    A giant gas planet -- up to 50x the mass of Jupiter, encircled by a ring of dust -- is likely hurtling around a star over 1000 light years away from Earth, according to international team of astronomers.
  • Kepler telescope spies details of TRAPPIST-1 system's outermost planet
    23.05.2017 14:18:58
    A team of astronomers has used data gathered by the Kepler Space Telescope to observe and confirm details of the outermost of seven exoplanets or-biting the star TRAPPIST-1.
  • New type of planetary object proposed: Synestia
    23.05.2017 14:18:52
    There's something new to look for in the heavens, and it's called a 'synestia,' according to planetary scientists. A synestia, they propose, would be a huge, spinning, donut-shaped mass of hot, vaporized rock, formed as planet-sized objects smash into each other.
  • Scientists take first tentative steps to explore potential climate of Proxima B
    16.05.2017 01:27:45
    The quest to discover whether a planet orbiting our closest neighboring star, Proxima Centauri (4.2 light years or 25 trillion miles from Earth), has the potential to support life has taken a new, exhilarating twist.
  • New 'styrofoam' planet provides tools in search for habitable planets
    16.05.2017 00:04:28
    Researchers have discovered a new planet orbiting a star 320 light years from Earth that has the density of styrofoam. This 'puffy' exoplanet may hold opportunities for testing atmospheres that will be useful when assessing future planets for signs of life.
  • Primitive atmosphere discovered around 'Warm Neptune'
    11.05.2017 20:19:51
    A pioneering new study uncovering the 'primitive atmosphere' surrounding a distant world could provide a pivotal breakthrough in the search to how planets form and develop in far-flung galaxies.
  • Two James Webb instruments are best suited for exoplanet atmospheres
    09.05.2017 20:52:11
    The best way to study the atmospheres of distant worlds with the James Webb Space Telescope, scheduled to launch in late 2018, will combine two of its infrared instruments, according to a team of astronomers.
  • Surprise! When a brown dwarf is actually a planetary mass object
    09.05.2017 18:20:26
    Sometimes a brown dwarf is actually a planet -- or planet-like anyway. A team discovered that what astronomers had previously thought was one of the closest brown dwarfs to our own Sun is in fact a planetary mass object.
  • 'Iceball' planet discovered through microlensing
    26.04.2017 18:24:37
    Scientists have discovered a new planet with the mass of Earth, orbiting its star at the same distance that we orbit our sun. The planet is likely far too cold to be habitable for life as we know it, however, because its star is so faint. But the discovery adds to scientists' understanding of the types of planetary systems that exist beyond our own.
  • Newly discovered exoplanet may be best candidate in search for signs of life
    19.04.2017 19:17:27
    An exoplanet orbiting a red dwarf star 40 light-years from Earth may be the new holder of the title 'best place to look for signs of life beyond the solar system.' Using ESO's HARPS instrument, and other telescopes, astronomers discovered a 'super-Earth' orbiting in the habitable zone around the star LHS 1140. This world is larger and more massive than the Earth and has likely retained most of its atmosphere. This makes it one of the most exciting targets for atmospheric studies.
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