Tech & Science Monster planet found orbiting dwarf star: 'surprised' astronomers

22:19  31 october  2017
22:19  31 october  2017 Source:   AFP

Sun-Like Star May Have Devoured 15 Alien Planets

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PARIS: A " monster " planet , which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised astronomers said The project gave its name to the star - NGTS-1 - and dubbed the planet NGTS-1b. The "b" signifies it is the first planet found around this star .

NGTS-1b, a " monster " planet , which should in theory not exist, has been discovered orbiting a feint, dwarf star far, far away, surprised astronomers The project gave its name to the star – NGTS-1 – and dubbed the planet NGTS-1b. The "b" signifies it is the first planet found around this star .

An artist's rendition of the huge planet NGTS-1b, left, with its neighbouring sun -- a discovery that challenges existing theories on how planets are created © Provided by AFP An artist's rendition of the huge planet NGTS-1b, left, with its neighbouring sun -- a discovery that challenges existing theories on how planets are created A "monster" planet, which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised astronomers said Tuesday.

The existence of the gassy giant challenges long-standing theories that such a big planet -- about the size of Jupiter -- cannot be formed around a star so small.

The star has a radius and mass about half that of the sun.

Theory had predicted that small stars can form rocky planets, "but do not gather enough material together to form Jupiter-sized planets," Britain's Royal Astronomical Society said in a statement.

Nasa might have found traces of ancient oceans on dwarf planet Ceres

  Nasa might have found traces of ancient oceans on dwarf planet Ceres Nasa's Dawn mission might have stumbled upon what they are calling remnants of ancient oceans on the surface of Ceres – a dwarf planet that is also the largest object in the asteroid belt. A report by Nasa noted that the presence of minerals- rich water is well-known, leading to speculation that there might have been large oceans on the dwarf planet. Nasa might have just stumbled upon answers to questions surrounding what became of the "global oceans", and whether or not there is still liquid water on the rock.

A " monster " planet , which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised astronomers said Tuesday. The project gave its name to the star -- NGTS-1 -- and dubbed the planet NGTS-1b. The "b" signifies it is the first planet found around this star .

A " monster " planet , which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised astronomers said Tuesday. The project gave its name to the star – NGTS-1 – and dubbed the planet NGTS-1b. The "b" signifies it is the first planet found around this star .

Planets are thought to form as gas and dust left over from massive galactic explosions, and swirling in disks around newborn stars, clump together to form bodies.

The planet was discovered by the Next-Generation Transit Survey (NGTS), based in Chile's Atacama Desert.

The project gave its name to the star -- NGTS-1 -- and dubbed the planet NGTS-1b. The "b" signifies it is the first planet found around this star.

The survey uses an array of 12 telescopes to scour the sky and identify dips in light emitted by stars -- a sign that a planet is moving in front of the star as perceived from Earth.

"The discovery of NGTS-1b was a complete surprise to us -- such massive planets were not thought to exist around such small stars," said Daniel Bayliss from the University of Warwick, a lead author of the study accepted for publication in the science journal Monthly Notices of the Royal Astronomical Society.

Nasa might have found traces of ancient oceans on dwarf planet Ceres

  Nasa might have found traces of ancient oceans on dwarf planet Ceres Nasa's Dawn mission might have stumbled upon what they are calling remnants of ancient oceans on the surface of Ceres – a dwarf planet that is also the largest object in the asteroid belt. Nasa's Dawn mission might have stumbled upon what they are calling remnants of ancient oceans on the surface of Ceres – a dwarf planet that is also the largest object in the asteroid belt.

— Reuters picPARIS, Oct 31 — A “ monster ” planet , which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised Once they found it, astronomers measured how much the planet ’s gravitational impact caused its parent star to “wobble”, so as to

A ' monster ' planet , which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised astronomers said Tuesday.

"The planet is about 25 percent the radius its host star. This makes is very large compared to its host star! For comparison, Jupiter is only about 10 percent the radius of our sun," Bayliss told AFP.

Once they found it, astronomers measured how much the planet's gravitational impact caused its parent star to "wobble", so as to determine its size, position and mass.

The planet orbited very close to its star, the team found -- just three percent of the distance between the Earth and the sun, and completes an orbit every 2.6 days, "meaning a year on NGTS-1b lasts two and a half Earth days."

The planet and star are about 600 light-years from Earth in a constellation called Columba.

"Despite being a monster of a planet, NGTS-1b was difficult to find because its parent star is so small and faint," said Bayliss's colleague Peter Wheatley.

The planet's parent star is described as an M-dwarf -- the most common type in the universe, which means there may be many more unpredicted giant gas planets to be found, the team said.

"I'm looking forward to seeing what other kinds of exciting new planets we can turn up," Wheatley said.

Proxima Centauri: Our Closest Cosmic Neighbour May Have an Entire Solar System We Never Knew About .
Cold dust has never been so intriguing.The discovery is described in a new paper accepted for publication in The Astrophysical Journal Letters. "It’s the first indication of the presence of an elaborate planetary system, and not just a single planet, around the star closest to our sun," lead author Guillem Anglada, an astronomer at the Institute of Astrophysics of Andalusia in Spain, said in a press release. "This result suggests that Proxima Centauri may have a multiple planet system with a rich history of interactions that resulted in the formation of a dust belt.

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