WASHINGTON (Reuters) - Scientists are expressing surprise after discovering a solar system 30 light-years away from Earth that defies current understanding about planet formation, with a large Jupiter-like planet orbiting a diminutive star known as a red dwarf.
Stars generally are much bigger than even the largest planets that orbit them. But in this case, the star and the planet are not much different in size, the researchers said on Thursday.
The star, called GJ 3512, is about 12% the size of our sun, while the planet that orbits it has a mass of at least about half of Jupiter, our solar system’s largest planet.
“Yes, an absolute surprise,” said astrophysicist Juan Carlos Morales of the Institute of Space Studies of Catalonia at the Institute of Space Sciences in Spain, who led the research published in the journal Science.
And here's another article:
Nobel prize in physics for discovery of exoplanet orbiting a star | New Scientist
The Nobel prize in physics has been awarded to James Peebles, Michel Mayor and Didier Queloz for their contributions to our understanding of the evolution of the universe and Earth's place in the cosmos.
One half of the award went to James Peebles at Princeton University for theoretical discoveries in physical cosmology, and the other half was jointly awarded to Michel Mayor at the University of Geneva and Didier Queloz at the universities of Geneva and Cambridge for their discovery of an exoplanet orbiting a solar-type star.
Peebles' research over two decades has formed the basis for our understanding of the universe's history after the big bang. He made theoretical predictions about the shape of the universe and the matter and energy that it contains! Scientists puzzled by really big planet orbiting really ...news.yahoo.com / scientists - puzzled ...Scientists are expressing surprise after discovering a solar system 30 light-years away from Earth that defies current understanding about planet formation, with a large Jupiter-like planet orbiting a diminutive star known as a red dwarf. The star, called GJ 3512, is about 12% the size of our sun, while!! These were later validated by measurements of background radiation.
Planet 9 could be an ancient black hole orbiting the sun - Business Insider
At the edge of our solar system, some unknown object is manipulating the paths of chunks of ice as they circle the sun.
These objects' oval-shaped orbits all point in the same direction and tilt the same way, suggesting that an unseen force is herding them.
At first, scientists thought the culprit was a mysterious planet, which they dubbed Planet Nine (though some call it Planet X ). But a new paper suggests the gravitational pull could come from a primordial black hole — a type of small black hole that scientists have theorized formed during the Big Bang.
Although the existence of primordial black holes has not been confirmed, some scientists think the universe is teeming with them. If they exist, such black holes could make up the 80% of the universe that scientists can't see. They know this " dark matter " exists because its gravity pulls on things throughout the universe.
A giant exoplanet orbiting a very-low-mass star challenges planet formation models | Science
M dwarfs, the most common type of star, are low-mass objects that emit most of their faint light in the near-infrared, making it difficult to detect any orbiting exoplanets! Scientists puzzled by really big planet orbiting really ...www.reuters.com ...Scientists puzzled by really big planet orbiting really little star - Reuters Scientists are expressing surprise after discovering a solar system 30 light-years away from Earth that defies current...!! Morales et al. have observed the nearby M dwarf GJ 3512 in the optical and near-infrared (see the Perspective by Laughlin). Periodic variations in the star's radial velocity show that it hosts a gas giant exoplanet on an eccentric orbit! Scientists puzzled by big planet orbiting little star - CNA ...planet-orbiting...Scientists puzzled by big planet orbiting little star An artistic impression of the gas giant planet GJ 3512b orbiting its red dwarf host star, released on Sep 26, 2019. (Guillem...!! The authors use simulations to show that such a large exoplanet around such a small star has implications for models of planet formation.
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Surveys have shown that super-Earth and Neptune-mass exoplanets are more frequent than gas giants around low-mass stars, as predicted by the core accretion theory of planet formation! Scientists Puzzled by Really Big Planet Orbiting Really ...gadgets.ndtv.com ...Scientists Puzzled by Really Big Planet Orbiting Really Little Star | Technology News Scientists are expressing surprise after discovering a solar system 30 light-years away from Earth that defies...!! We report the discovery of a giant planet around the very-low-mass star GJ 3512, as determined by optical and near-infrared radial-velocity observations! Videos for Scientists Puzzled By 6:21 Scientists puzzled by discovery of new human organ called 'mes...Facebook!! The planet has a minimum mass of 0.46 Jupiter masses, very high for such a small host star, and an eccentric 204-day orbit. Dynamical models show that the high eccentricity is most likely due to planet-planet interactions. We use simulations to demonstrate that the GJ 3512 planetary system challenges generally accepted formation theories, and that it puts constraints on the planet accretion and migration rates. Disk instabilities may be more efficient in forming planets than previously thought.
Other things to check out:
Bentley Systems Bolsters Digital Cities Offerings with Acquisitions of Citilabs and Orbit
Advancing mobility digital twins through Orbit GT 's automated mobile mapping workflows (digital context) and Citilabs' CUBE simulations (digital components) for predictive transportation scenarios (digital chronology)
SINGAPORE , Oct. 20, 2019 /PRNewswire/ -- The Year in Infrastructure 2019 Conference -- Bentley Systems, Incorporated, the leading global provider of comprehensive software and digital twin cloud services for advancing the design, construction, and operations of infrastructure, today announced the acquisitions of global mobility simulation ( CUBE ) and analytics ( Streetlytics ) software provider Citilabs , and global provider of 3D and mobile mapping software, Orbit Geospatial Technologies (Orbit GT) . The newly acquired technologies, in conjunction with Bentley's existing design integration and digital cities offerings, enable engineering-based mobility digital twins.
Electric orbit raising and space weather - Room: The Space Journal
New research suggests that, in a worst-case scenario, the degradation of satellite solar arrays due to space weather effects may result in a drop in output power equivalent to many years in the geostationary orbit environment. Alexander Lozinski explains the effects and the risks involved for satellites using electric orbit raising.
During a radiation storm, high-energy charged particles ejected by the Sun can stream into the Earth's magnetosphere, the magnetic bubble that surrounds the planet and acts as a protective barrier to interplanetary space.
Once here, the movement of the charged particles becomes constrained by electromagnetic forces that arise from their interaction with the Earth's magnetic field; the particles begin to encircle Earth, gyrating up and down magnetic field lines, and eventually become part of the torus-shaped Van Allen radiation belts. Occasionally, charged particles can also trickle down magnetic field lines near the poles and into Earth's atmosphere, resulting in magnificent auroral displays studied using ground-based instrumentation placed in polar regions.
This week, the Zoological Park will unveil a new exhibit featuring a bizarre creature that has surprised and puzzle… https://t.co/WugCxbTczf SmithsonianMag (from Washington, D.C.) Fri Oct 18 05:30:12 +0000 2019
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