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Bad Astronomy | HR 8799's four-planet system is doomed

Bad Astronomy | HR 8799's four-planet system is doomed
syfy.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from syfy.com Daily Mail and Mail on Sunday newspapers.

Columba-association , University-of-warwick-mark-garlick , University-of-warwick-mark-garlick-video , Mark-garlick , White-dwarfs , Planetary-nebulae , Crash-course-astronomy , பல்கலைக்கழகம்-ஆஃப்-வார்விக்-குறி-பூண்டு , குறி-பூண்டு , வெள்ளை-குள்ளர்கள் , செயலிழப்பு-நிச்சயமாக-வானியல்

Astronomers spot two stars locked in supernova death spiral – Astronomy Now

Astronomers spot two stars locked in supernova death spiral – Astronomy Now
astronomynow.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from astronomynow.com Daily Mail and Mail on Sunday newspapers.

Texas , United-states , Thomas-kupfer , Ingrid-pelisoli , University-of-warwick-mark-garlick , Texas-tech-university , Exoplanet-survey-satellite , University-of-warwick-department-physics , Warwick-department , Echellette-spectrograph , Texas-tech , டெக்சாஸ்

Teardrop star reveals hidden supernova doom

Teardrop star reveals hidden supernova doom
eurekalert.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eurekalert.org Daily Mail and Mail on Sunday newspapers.

Germany , Daresbury , Halton , United-kingdom , Chile , German , Ingrid-pelisoli , Peter-thorley , Deutsche-forschungsgemeinschaft , Tom-frew , Warwick-medical-school , University-of-potsdam

Star's death will play a mean pinball with rhythmic planets

Four planets locked in a perfect rhythm around a nearby star are destined to be pinballed around their solar system when their sun eventually dies, according to a study led by the University of Warwick that peers into its future.

Daresbury , Halton , United-kingdom , Chile , Exeter , Devon , Dimitri-veras , Peter-thorley , Sasha-hinkley , Warwick-medical-school , Daresbury-laboratory , United-kingdom-research

How will life on Earth end? | Astronomy.com

How will life on Earth end? | Astronomy.com
astronomy.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from astronomy.com Daily Mail and Mail on Sunday newspapers.

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Chemical fingerprint reveals a migrating exoplanet | Space

April 14, 2021
The chemical fingerprint of exoplanet HD 209458b’s atmosphere reveals as many as 6 molecules and that it has migrated inwards from its birthplace much farther out in its star system.
Artist’s concept of exoplanet Osiris – aka HD 209458b – as it transits in front of its star. Note the illuminated crescent of the planet, where the colors illustrate the light spectra that – like a chemical fingerprint – let astronomers identify as many as 6 molecules in the planet’s atmosphere. “It’s the first time so many molecules have been measured and points to an atmosphere with more carbon than oxygen”, they said. Image via University of Warwick/ Mark Garlick.

Italy , La-palma , Murcia , Spain , Canary-islands , Spain-general , Italian , Paolo-giacobbe , Siddharth-gandhi , Matteo-brogi , Italian-national-institute-for-astrophysics , University-of-warwick

Evidence for white dwarfs consuming Earth-like worlds | Space

February 26, 2021
For the first time, astronomers have detected the vaporized remains of the crusts of long-dead Earth-like and Mars-like planets in the atmospheres of white dwarf stars.
Artist’s concept of planetary crust fragments being vaporized around a white dwarf star. Image via University of Warwick/ Mark Garlick.
Finding other Earth-
like planets in our Milky Way galaxy has been a holy grail of exoplanet research. Astronomers have found Earth-
sized exoplanets. But is an Earth-sized planet going to be Earth-like? We still don’t know. Now, though, scientists at the University of Warwick in the U.K. have announced another clue that some exoplanets can, and do, have Earth-like compositions. The results come not from the planets themselves, but rather the vaporized remains of their crusts in the atmospheres of white dwarf stars.

Emmanuel-tremblay , Mark-hollands , University-of-warwick , European-space-agency-gaia , University-of-warwick-mark-garlick , Milky-way , Nature-astronomy , European-space-agency , Pier-emmanuel-tremblay , Vaporized-earth-like-mars-crusts-white-dwarf-stars , Space , இம்மானுவேல்-நடுக்கம்

Vaporised crusts of Earth-like planets found in dying stars

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IMAGE: Remnants of planetary crust disintegrating under the tidal forces around a cool white dwarf. Material in the disc becomes vapourised close to the central star and flows onto the white...
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Credit: University of Warwick/Mark Garlick
Observations of lithium and potassium around white dwarf stars point to remains of rocky planet crusts
Analysis by astronomers led by University of Warwick shows chemical composition of crusts is very similar to Earth's continental crust
The outer layers of the white dwarfs contain up to 300,000 gigatonnes of rocky debris, which includes up to 60 gigatonnes of lithium and 3,000 gigatonnes of potassium

Daresbury , Halton , United-kingdom , Chile , Emmanuel-tremblay , Peter-thorley , Mark-hollands , European-union-horizon , Warwick-medical-school , Daresbury-laboratory , United-kingdom-research , European-space-agency-gaia

Bad Astronomy | WASP-107b is a superpuff planet with an extremely small core

WASP-107b was discovered in 2017, and quickly found to be weird. It’s a hot Jupiter, a gas giant orbiting its star very closely, at a distance of only 9 million kilometers. Mercury orbits the Sun at roughly 60 million kilometers, so WASP-107b is
close. The host star, WASP-107, is an orange dwarf, smaller and cooler than the Sun, but still not something you want to be that close to unless baking your entire planet is your goal. The temperature of WASP-107b is likely around 1,000° C (1,800°F).
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Artwork of a "hot Jupiter", an exoplanet the size of Jupiter but orbiting its host star at a small fraction of Earth's distance to the Sun. Credit: University of Warwick/Mark Garlick

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