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Inhalt von "http://feeds.sciencedaily.com/sciencedaily/space_time/extrasolar_planets"

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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.

Superflares from young red dwarf stars imperil planets
Donnerstag, 18.10.2018, 20:12:04 Uhr
Flares from the youngest red dwarfs surveyed are 100 to 1,000 times more energetic than when the stars are older. This younger age is when terrestrial planets are forming around their stars.
Double dust ring test could spot migrating planets
Mittwoch, 17.10.2018, 17:10:14 Uhr
Astrophysicist now have a way of finally telling whether newly forming planets are migrating within the disc of dust and gas that typically surrounds stars or whether they are simply staying put in the same orbit around the star.
Giant planets around young star raise questions about how planets form
Montag, 15.10.2018, 16:45:31 Uhr
Researchers have identified a young star with four Jupiter and Saturn-sized planets in orbit around it, the first time that so many massive planets have been detected in such a young system. The system has also set a new record for the most extreme range of orbits yet observed: the outermost planet is more than a thousand times further from the star than the innermost one, which raises interesting questions about how such a system might have formed.
Astronomers find first compelling evidence for a moon outside our solar system
Mittwoch, 03.10.2018, 20:29:31 Uhr
On the hunt for distant worlds, researchers have identified an exomoon candidate around the transiting exoplanet Kepler-1625b that indicates the presence of a previously unknown gas-giant moon.
New extremely distant solar system object found during hunt for Planet X
Dienstag, 02.10.2018, 16:29:08 Uhr
Astronomers have discovered a new extremely distant object far beyond Pluto with an orbit that supports the presence of an even-farther-out, Super-Earth or larger Planet X.
Astronomers use Earth's natural history as guide to spot vegetation on new worlds
Montag, 24.09.2018, 23:44:46 Uhr
By looking at Earth's full natural history and evolution, astronomers may have found a template for vegetation fingerprints -- borrowing from epochs of changing flora -- to determine the age of habitable exoplanets.
Pluto should be reclassified as a planet, experts say
Freitag, 07.09.2018, 17:04:22 Uhr
The reason Pluto lost its planet status is not valid, according to new research.
New exoplanet found very close to its star
Mittwoch, 05.09.2018, 22:19:34 Uhr
Using data from NASA's Kepler Space Telescope, an international team has discovered a new exoplanet twice the size of Earth. It orbits its star every six days and is thus very close to it, about 10 times closer than Mercury is to the Sun.
Water worlds could support life, study says
Freitag, 31.08.2018, 14:35:39 Uhr
The conditions for life surviving on planets entirely covered in water are more fluid than previously thought, opening up the possibility that water worlds could be habitable, according to a new article.
Stellar 'swarms' help astronomers understand the evolution of stars
Dienstag, 28.08.2018, 17:47:57 Uhr
Researchers have identified nearly a thousand potential members and 31 confirmed members of stellar associations -- stars of similar ages and compositions that are drifting together through space -- in our own corner of the Milky Way. Their research could help astronomers understand the evolution of stars and the properties of future exoplanet discoveries.
Jupiter had growth disorders
Montag, 27.08.2018, 17:08:40 Uhr
Researchers can now show how Jupiter was formed. Data collected from meteorites had indicated that the growth of the giant planet had been delayed for two million years. Now the researchers have found an explanation: Collisions with kilometer-sized blocks generated high energy, which meant that in this phase hardly any accretion of gas could take place and the planet could only grow slowly.
Water-worlds are common: Exoplanets may contain vast amounts of water
Samstag, 18.08.2018, 17:57:58 Uhr
Scientists have shown that water is likely to be a major component of those exoplanets (planets orbiting other stars) which are between two to four times the size of Earth. It will have implications for the search of life in our Galaxy.
Study of material surrounding distant stars shows Earth's ingredients 'pretty normal'
Donnerstag, 16.08.2018, 01:05:30 Uhr
The Earth's building blocks seem to be built from 'pretty normal' ingredients, according to researchers working with the world's most powerful telescopes. Scientists have measured the compositions of 18 different planetary systems from up to 456 light years away and compared them to ours, and found that many elements are present in similar proportions to those found on Earth. This will have implications for finding Earth-like bodies elsewhere.
Iron and titanium in the atmosphere of an exoplanet
Mittwoch, 15.08.2018, 19:05:55 Uhr
Exoplanets can orbit close to their host star. When the host star is much hotter than our sun, then the exoplanet becomes as hot as a star. The hottest 'ultra-hot' planet was discovered last year. A team has now discovered the presence of iron and titanium vapors in the atmosphere of this planet. This detection was made possible by the surface temperature of this planet, which reaches more than 4,000 degrees.
Ultrahot planets have starlike atmospheres
Donnerstag, 09.08.2018, 20:45:18 Uhr
An unusual kind of star-planet hybrid atmosphere is emerging from studies of ultrahot planets orbiting close to other stars.
Largest haul of extrasolar planets
Dienstag, 07.08.2018, 15:51:23 Uhr
Forty-four planets in planetary systems beyond our own have been unveiled in one go, dwarfing the usual number of confirmations from extrasolar surveys, which is typically a dozen or less. The findings will improve our models of planetary systems and may help researchers investigate exoplanet atmospheres. Novel techniques developed to validate the find could hugely accelerate the confirmation of more extrasolar planet candidates.
VLA detects possible extrasolar planetary-mass magnetic powerhouse
Freitag, 03.08.2018, 16:33:36 Uhr
Astronomers have detected a possible planetary-mass object with a surprisingly powerful magnetic field some 20 light-years from Earth. It can help scientists better understand magnetic processes on stars and planets.
Exoplanets where life could develop as it did on Earth
Mittwoch, 01.08.2018, 23:20:56 Uhr
Scientists have identified a group of planets outside our solar system where the same chemical conditions that may have led to life on Earth exist.
Astronomers assemble 'light-fingerprints' to unveil mysteries of the cosmos
Dienstag, 31.07.2018, 16:42:11 Uhr
Earthbound detectives rely on fingerprints to solve their cases; now astronomers can do the same, using 'light-fingerprints' instead of skin grooves to uncover the mysteries of exoplanets.
Plate tectonics not needed to sustain life
Montag, 30.07.2018, 23:28:14 Uhr
There may be more habitable planets in the universe than we previously thought, according to geoscientists, who suggest that plate tectonics -- long assumed to be a requirement for suitable conditions for life -- are in fact not necessary.
New family photos of Mars and Saturn from Hubble
Donnerstag, 26.07.2018, 22:10:31 Uhr
In summer 2018 the planets Mars and Saturn are, one after the other, in opposition to Earth. During this event the planets are relatively close to Earth, allowing astronomers to observe them in greater detail. Hubble took advantage of this preferred configuration and imaged both planets to continue its long-standing observation of the outer planets in the solar system.
More mysteries of metallic hydrogen
Dienstag, 24.07.2018, 17:02:38 Uhr
Liquid metallic hydrogen is not present naturally on Earth and has only been created in a handful of places. Now scientists are researching the properties of liquid metallic hydrogen to understand how planets both inside and outside our solar system form magnetic shields.
Finding a planet with a 10 year orbit in just a few months
Mittwoch, 18.07.2018, 15:25:07 Uhr
To discover the presence of a planet around stars, astronomers wait until it has completed three orbits. However, this effective technique has its drawbacks since it cannot confirm the presence of planets at relatively long periods. To overcome this obstacle, astronomers have developed a method that makes it possible to ensure the presence of a planet in a few months, even if it takes 10 years to circle its star.
A dozen new moons of Jupiter discovered, including one 'oddball'
Dienstag, 17.07.2018, 16:12:56 Uhr
Twelve new moons orbiting Jupiter have been found -- 11 'normal' outer moons, and one that they're calling an 'oddball.' Astronomers first spotted the moons in the spring of 2017 while they were looking for very distant solar system objects as part of the hunt for a possible massive planet far beyond Pluto.
Astronomers find a famous exoplanet's doppelganger
Dienstag, 17.07.2018, 15:48:07 Uhr
A new planet has been imaged, and it appears nearly identical to one of the best studied gas-giant planets. But this doppelganger differs in one very important way: Its origin. One object has long been known: the 13-Jupiter-mass planet beta Pictoris b, one of the first planets discovered by direct imaging, back in 2009. The new object, dubbed 2MASS 0249 c, has the same mass, brightness, and spectrum as beta Pictoris b.
Rocky planet neighbor looks familiar, but is not Earth's twin
Dienstag, 10.07.2018, 18:28:24 Uhr
Last autumn, the world was excited by the discovery of an exoplanet called Ross 128 b, which is just 11 light years away from Earth. New work has for the first time determined detailed chemical abundances of the planet's host star, Ross 128.
'Cataclysmic' collision shaped Uranus' evolution
Montag, 02.07.2018, 23:09:03 Uhr
Uranus was hit by a massive object roughly twice the size of Earth that caused the planet to tilt and could explain its freezing temperatures, according to new research.
First confirmed image of newborn planet caught with ESO's VLT
Montag, 02.07.2018, 15:40:40 Uhr
SPHERE, a planet-hunting instrument on ESO's Very Large Telescope, has captured the first confirmed image of a planet caught in the act of forming in the dusty disc surrounding a young star. The young planet is carving a path through the primordial disc of gas and dust around the very young star PDS 70. The data suggest that the planet's atmosphere is cloudy.
More clues that Earth-like exoplanets are indeed Earth-like
Donnerstag, 28.06.2018, 21:17:08 Uhr
Researchers suggest that two Earth-like exoplanets (Kepler-186f and 62f) have very stable axial tilts, much like the Earth, making it likely that each has regular seasons and a stable climate.
Scientists develop new strategies to discover life beyond earth
Donnerstag, 28.06.2018, 16:51:13 Uhr
Scientists now think we may be able to detect signs of life on planets beyond our solar system in the next few decades, but to do so new tools and techniques will be required. Researchers from around the world just produced a roadmap to develop the techniques that may finally answer the question of whether we are alone in the Universe.
Scientists developing guidebook for finding life beyond Earth
Dienstag, 26.06.2018, 01:26:48 Uhr
Some of the leading experts in the field, including a UC Riverside team of researchers, have written a major series of review papers on the past, present, and future of the search for life on other planets.
Nearly 80 exoplanet candidates identified in record time
Donnerstag, 21.06.2018, 18:19:01 Uhr
Scientists have analyzed data from K2, the follow-up mission to NASA's Kepler Space Telescope, and have discovered a trove of possible exoplanets amid some 50,000 stars. The scientists report the discovery of nearly 80 new planetary candidates, including a particular standout: a likely planet that orbits the star HD 73344, which would be the brightest planet host ever discovered by the K2 mission.
Hunting molecules to find new planets
Montag, 18.06.2018, 17:30:30 Uhr
It's been impossible to obtain images of an exoplanet, so dazzling is the light of its star. However, astronomers have the idea of detecting molecules that are present in the planet's atmosphere in order to make it visible, provided that these same molecules are absent from its star. Thanks to this innovative technique, the device is sensitive to the selected molecules, making the star invisible and allowing the astronomers to observe the planet.
Distant moons may harbor life
Freitag, 15.06.2018, 03:36:00 Uhr
Researchers have identified more than 100 giant planets that potentially host moons capable of supporting life. Their work will guide the design of future telescopes that can detect these potential moons and look for tell-tale signs of life, called biosignatures, in their atmospheres.
Trio of infant planets discovered around newborn star
Mittwoch, 13.06.2018, 16:19:28 Uhr
Two independent teams of astronomers have uncovered convincing evidence that three young planets are in orbit around an infant star known as HD 163296. Using a new planet-finding strategy, the astronomers identified three discrete disturbances in a young star's gas-filled disk: the strongest evidence yet that newly formed planets are in orbit there.
Multiple alkali metals in unique exoplanet
Donnerstag, 07.06.2018, 17:27:35 Uhr
Scientists have observed a rare gaseous planet, with partly clear skies, and strong signatures of alkali metals in its atmosphere.
System with three Earth-sized planets discovered
Donnerstag, 07.06.2018, 17:27:27 Uhr
Today marks the discovery of two new planetary systems, one of them hosting three planets with the same size of the Earth.
First interstellar immigrant discovered in the solar system
Montag, 21.05.2018, 15:27:17 Uhr
A new study has discovered the first known permanent immigrant to our solar system. The asteroid, currently nestling in Jupiter's orbit, is the first known asteroid to have been captured from another star system.
NASA's new planet hunter snaps initial test image, swings by Moon toward final orbit
Freitag, 18.05.2018, 18:19:28 Uhr
After launching April 18, TESS has completed its lunar flyby to put it on track for its final science orbit, and has released a first test image.
Orbital variations can trigger 'snowball' states in habitable zones around sunlike stars
Dienstag, 15.05.2018, 22:28:13 Uhr
Aspects of an otherwise Earthlike planet's tilt and orbital dynamics can severely affect its potential habitability -- even triggering abrupt 'snowball states' where oceans freeze and surface life is impossible, according to new research from astronomers.
Atmospheric seasons could signal alien life
Mittwoch, 09.05.2018, 19:54:17 Uhr
To complement traditional biosignatures, scientists are developing the first quantitative framework for dynamic biosignatures based on seasonal changes in the Earth's atmosphere.
Astronomers find exoplanet atmosphere free of clouds
Montag, 07.05.2018, 17:19:20 Uhr
Scientists have detected an exoplanet atmosphere that is free of clouds, marking a pivotal breakthrough in the quest for greater understanding of the planets beyond our solar system.
Mars growth was stunted by early giant planetary instability
Montag, 07.05.2018, 14:48:32 Uhr
An astrophysics team explains why the growth of Mars was stunted by an orbital instability among the outer solar system's giant planets in a new study on the evolution of the young solar system. The study builds on the widely accepted Nice Model, which invokes a planetary instability to explain many peculiar observed aspects of the outer solar system. The research shows how planet accretion (growth) is halted by the outer solar system instability.
Hubble detects helium in the atmosphere of an exoplanet for the first time
Mittwoch, 02.05.2018, 19:18:17 Uhr
Astronomers using the NASA/ESA Hubble Space Telescope have detected helium in the atmosphere of the exoplanet WASP-107b. This is the first time this element has been detected in the atmosphere of a planet outside the Solar System. The discovery demonstrates the ability to use infrared spectra to study exoplanet extended atmospheres.
Ultrahigh-pressure laser experiments shed light on super-Earth cores
Mittwoch, 25.04.2018, 22:20:39 Uhr
Using high-powered laser beams, researchers have simulated conditions inside a planet three times as large as Earth. The pressures achieved in this study, up to 1,314 gigapascals (GPa), allowed researchers to gather the highest-pressure X-ray diffraction data ever recorded and generate new, more robust models for the interior structure of large, rocky exoplanets.
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.
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.
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.
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.
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.
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.
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.
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.
15 new planets confirmed around cool dwarf stars
Montag, 12.03.2018, 13:50:57 Uhr
Scientists report the existence of 15 new planets -- including one 'super-Earth' that could harbor liquid water -- orbiting small, cool stars near our solar system. These stars, known as red dwarfs, are of enormous interest for studies of planetary formation and evolution.
First laboratory simulation of exoplanet atmospheric chemistry
Donnerstag, 08.03.2018, 16:51:47 Uhr
Scientists have conducted the first lab experiments on haze formation in simulated exoplanet atmospheres, an important step for understanding upcoming observations of planets outside the solar system with the James Webb Space Telescope.
Hubble finds huge system of dusty material enveloping the young star HR 4796A
Dienstag, 06.03.2018, 19:17:57 Uhr
Astronomers have used NASA's Hubble Space Telescope to uncover a vast, complex dust structure, about 150 billion miles across, enveloping the young star HR 4796A.
Hubble observes exoplanet atmosphere in more detail than ever before
Donnerstag, 01.03.2018, 20:41:31 Uhr
An international team of scientists has used the NASA/ESA Hubble Space Telescope to study the atmosphere of the hot exoplanet WASP-39b. By combining this new data with older data they created the most complete study yet of an exoplanet atmosphere. The atmospheric composition of WASP-39b hints that the formation processes of exoplanets can be very different from those of our own Solar System giants.

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