Exposed: The first exoplanet to bare its core only takes 18 hours to complete a year and sizzles at 1,500 degrees Celsius
University of Warwick/Mark Garlick
- The first-ever
exoplanetwith an exposed core was discovered by scientists at the University of Warwick.
- It’s so close to its star that it only takes 18 hours to complete a year with a surface temperature of 1,500 degrees Celsius.
- Scientists assume that it either never formed an atmosphere, to begin with, or was stripped of its gases sometime during its life cycle.
Dubbed TOI 849 b, the planet is around the same size as
However, unlike Neptune, it’s much hotter due to its proximity to its star.
“The planet is strangely close to its star, considering its mass. In other words, we don’t see planets with this mass at these short orbital periods,” said David Armstrong, the lead author of the study published in Nature. It is the first time that an intact exposed core of a gas giant has been discovered around a star.
- 40 times heavier than Earth
- 3.4 times bigger than Earth
- Made up of iron, rock and water
- Very little hydrogen and helium
Exposed without an atmosphere
Researchers from the University of Warwick assume the gas giant was once a lot like Jupiter but was stripped of its gaseous atmosphere. This could be due to multiple reasons like being ripped apart for orbiting too close to its star or colliding with another planet.
Another explanation is that it's a ‘failed’ gas giant, which was never able to form an atmosphere, to begin with.
"The fact that we don’t see those gases lets us know TOI 849 b is an exposed planetary core," remarked Armstrong.
TOI 849 b was found in a survey of stars by NASA’s Transiting Exoplanet Survey Satellite (TESS), using the transit method. This is when the satellite measures the brightness of a star. A dip in brightness indicates that a planet has passed in front of them.
The fastest-growing black hole in the universe eats one sun a day — doubling its diet from just a month ago
Indian start-up is building a three-stage rocket that could be ready to launch by 2022
Colliding black holes the size of Lucknow merged to create light for the first time
- Amid tensions with China, US stealth bombers are back at a secretive Indian Ocean base for first time in years
- Hubble Space Telescope images explain why Betelgeuse was fading and how the monster star is not going to explode — just yet
- Bharat Petroleum reports 93% increase in its standalone net profit for April-June quarter
- WHO is talking to Russia to know more about their coronavirus vaccine
- Top stocks to watch today—IndiGo, SpiceJet, Hero MotoCorp, BPCL, Tata Steel, Glenmark Pharma and others