• About
  • Advertise
  • Privacy & Policy
  • Contact
Tuesday, November 28, 2023
Earth-News
  • Home
  • Business
  • Entertainment
    The Best Looks And Moments From The 2023 Soul Train Awards

    The Best Looks And Moments From The 2023 Soul Train Awards

    Jack Harlow’s “Lovin On Me” Climbs To No. 1 On Billboard Hot 100

    Jack Harlow’s “Lovin On Me” Climbs To No. 1 On Billboard Hot 100

    ‘The Color Purple’ Soundtrack To Feature Megan Thee Stallion, H.E.R, Usher, And More

    ‘The Color Purple’ Soundtrack To Feature Megan Thee Stallion, H.E.R, Usher, And More

    Roger Bonds, Diddy’s Former Head of Security, Breaks Silence On Cassie’s Lawsuit

    Roger Bonds, Diddy’s Former Head of Security, Breaks Silence On Cassie’s Lawsuit

    Keke Palmer Drops “Serious” Music Video Following BET Soul Train Awards Performance

    Keke Palmer Drops “Serious” Music Video Following BET Soul Train Awards Performance

    Dolly Parton reveals relatable reason why she refuses to text: ‘I don’t want to have to answer’

    Dolly Parton reveals relatable reason why she refuses to text: ‘I don’t want to have to answer’

  • General
  • Health
  • News
    Paris mayor quits X, calling social media platform a ‘vast global sewer’

    Paris mayor quits X, calling social media platform a ‘vast global sewer’

    Sierra Leone authorities searching for attackers who targeted military barracks, prison

    Sierra Leone authorities searching for attackers who targeted military barracks, prison

    Togo announces legislative and regional elections will be held in early 2024

    Togo announces legislative and regional elections will be held in early 2024

    More than a dozen dead as storm sweeps through Russia, Ukraine and Moldova

    More than a dozen dead as storm sweeps through Russia, Ukraine and Moldova

    Niger junta revokes anti-migration law in setback to EU strategy

    Niger junta revokes anti-migration law in setback to EU strategy

    The 21 Cyber Monday Kitchen Deals Bon Appétit Editors Are Shopping in 2023

    The 21 Cyber Monday Kitchen Deals Bon Appétit Editors Are Shopping in 2023

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Tech
    Changan Auto Launches L07/S07 Models in Bangkok, Southeast Asia Debut Set for Nov 29

    Changan Auto Launches L07/S07 Models in Bangkok, Southeast Asia Debut Set for Nov 29

    SHEIN Covertly Files for US IPO, Valuation Could Surpass $80 Billion

    SHEIN Covertly Files for US IPO, Valuation Could Surpass $80 Billion

    DiDi App Crashed, Full Repair Pending 

    DiDi App Crashed, Full Repair Pending 

    Xiaomi Automobile’s Imminent Listing: New Retail Store Design Revealed

    Xiaomi Automobile’s Imminent Listing: New Retail Store Design Revealed

    NIOPhone Will Soon Support Google GMS Framework

    NIOPhone Will Soon Support Google GMS Framework

    Best Cyber Monday Chromebook deals

    Best Cyber Monday Chromebook deals

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    The Best Looks And Moments From The 2023 Soul Train Awards

    The Best Looks And Moments From The 2023 Soul Train Awards

    Jack Harlow’s “Lovin On Me” Climbs To No. 1 On Billboard Hot 100

    Jack Harlow’s “Lovin On Me” Climbs To No. 1 On Billboard Hot 100

    ‘The Color Purple’ Soundtrack To Feature Megan Thee Stallion, H.E.R, Usher, And More

    ‘The Color Purple’ Soundtrack To Feature Megan Thee Stallion, H.E.R, Usher, And More

    Roger Bonds, Diddy’s Former Head of Security, Breaks Silence On Cassie’s Lawsuit

    Roger Bonds, Diddy’s Former Head of Security, Breaks Silence On Cassie’s Lawsuit

    Keke Palmer Drops “Serious” Music Video Following BET Soul Train Awards Performance

    Keke Palmer Drops “Serious” Music Video Following BET Soul Train Awards Performance

    Dolly Parton reveals relatable reason why she refuses to text: ‘I don’t want to have to answer’

    Dolly Parton reveals relatable reason why she refuses to text: ‘I don’t want to have to answer’

  • General
  • Health
  • News
    Paris mayor quits X, calling social media platform a ‘vast global sewer’

    Paris mayor quits X, calling social media platform a ‘vast global sewer’

    Sierra Leone authorities searching for attackers who targeted military barracks, prison

    Sierra Leone authorities searching for attackers who targeted military barracks, prison

    Togo announces legislative and regional elections will be held in early 2024

    Togo announces legislative and regional elections will be held in early 2024

    More than a dozen dead as storm sweeps through Russia, Ukraine and Moldova

    More than a dozen dead as storm sweeps through Russia, Ukraine and Moldova

    Niger junta revokes anti-migration law in setback to EU strategy

    Niger junta revokes anti-migration law in setback to EU strategy

    The 21 Cyber Monday Kitchen Deals Bon Appétit Editors Are Shopping in 2023

    The 21 Cyber Monday Kitchen Deals Bon Appétit Editors Are Shopping in 2023

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Tech
    Changan Auto Launches L07/S07 Models in Bangkok, Southeast Asia Debut Set for Nov 29

    Changan Auto Launches L07/S07 Models in Bangkok, Southeast Asia Debut Set for Nov 29

    SHEIN Covertly Files for US IPO, Valuation Could Surpass $80 Billion

    SHEIN Covertly Files for US IPO, Valuation Could Surpass $80 Billion

    DiDi App Crashed, Full Repair Pending 

    DiDi App Crashed, Full Repair Pending 

    Xiaomi Automobile’s Imminent Listing: New Retail Store Design Revealed

    Xiaomi Automobile’s Imminent Listing: New Retail Store Design Revealed

    NIOPhone Will Soon Support Google GMS Framework

    NIOPhone Will Soon Support Google GMS Framework

    Best Cyber Monday Chromebook deals

    Best Cyber Monday Chromebook deals

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Some exoplanets are shrinking. Here’s why

November 17, 2023
in Science
Some exoplanets are shrinking. Here’s why
Share on FacebookShare on Twitter

News

Science & Astronomy

An artist's illustration shows a bright blue planet in the foreground with a yellow, glowing star in the background.

Scientists have found new evidence suggesting how sub-Neptunes like the one shown here can lose their atmospheres
(Image credit: NASA, ESA, CSA, and D. Player (STScI))

The air around a few planets beyond our solar system is leaking away into space, causing these worlds to get smaller, astronomers reported on Wednesday (November 15). And these planets’ atmospheres aren’t getting blown away by harsh winds from their stars as you might expect, but rather by their own doing. 

About 90 tons of air from Earth’s protective blanket, responsible for sheltering life, is known to escape into space every day because our atmosphere gets heated by the sun. At this super slow rate, however, scientists think it would take our planet at least 15 trillion years to be completely stripped of its atmosphere. So there’s nothing to worry about on that front.

But a few exoplanets, especially some bigger than Earth but smaller than Neptune, are actually pushing away their atmospheres from within through a process known as “core-powered mass loss,” a new study finds. This mechanism is believed to be able to shrink a puffy, sub-Neptune planet all the way down to a rocky super-Earth. With this information, astronomers say they now have sufficient  data to explain why they don’t see many  exoplanets with sizes about 1.5 to two times Earth’s. That’s the sweet spot between a super-Earth and sub-Neptune.

“Exoplanet scientists have enough data now to say that this gap is not a fluke,” study lead author Jessie Christiansen, a scientist at Caltech, said in a statement. “There’s something going on that impedes planets from reaching and/or staying at this size.”

Related: NASA’s exoplanet-hunting telescope spies 8 ‘super-Earths’

The team suspects that “something” is radiation from deep within these sub-Neptune planets, specifically their hot cores, pushing away atmospheres. “That radiation is pushing on the atmosphere from underneath,” said Christiansen.

An alternate (but unlikely) theory for these sub-Neptunes is a phenomenon called photoevaporation, in which a planet’s atmosphere is blasted away due to a star’s radiation, like “a hair dryer on an ice cube.” This is probably not the solution to this mystery, however, because the process is thought to occur in the first 100 million years of a planet’s birth, while the new study analyzed much older sub-Neptunes.

Christiansen and her colleagues analyzed exoplanet data collected by NASA’s Kepler 2 mission, a revised exoplanet-hunting effort after the Kepler spacecraft faced some technical setbacks. The team looked for sub-Neptunes orbiting stars in two star clusters: The Praesepe or Beehive cluster, which hosts about 1,000 stars, and the Hyades cluster, which hosts about 500 stars and forms the head of the “Bull” in the Taurus constellation. They’re 600 million years old and 800 million years old, respectively.

In this age range, scientists found almost all stars had sub-Neptunes with atmospheres orbiting them, suggesting photoevaporation did not occur (or they’d have completely lost their atmospheres by now).

In planets around stars more than 800 million years old in K2’s database, however, only 25 percent exhibited  orbiting sub-Neptunes. Because the older age of those stars is close to the 1 billion year time frame when core-powered mass loss is expected to have occurred, the core-pushing-related mechanism is likely the reason behind atmospheric escape on these planets, the new study argues. 

Either way, “if you don’t have enough mass, you can’t hold on, and you lose your atmosphere and shrink down,” said Christiansen.

This research is described in a paper published Wednesday (Nov. 15) in The Astronomical Journal. 

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: [email protected].

Breaking space news, the latest updates on rocket launches, skywatching events and more!

Sharmila is a Seattle-based science journalist. She found her love for astronomy in Carl Sagan’s The Pale Blue Dot and has been hooked ever since. She holds an MA in Journalism from Northeastern University and has been a contributing writer for Astronomy Magazine since 2017. Follow her on Twitter at @skuthunur.

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : Space.com – https://www.space.com/nasa-kepler-telescope-exoplanets-shrinking-size

Tags: ExoplanetsscienceShrinking
Previous Post

Algol, the ‘Demon star of Perseus,’ gets eclipsed this week. Here’s how to see it

Next Post

Lego’s Apollo 11 Lunar Lander is 20% off this weekend

Changan Auto Launches L07/S07 Models in Bangkok, Southeast Asia Debut Set for Nov 29

Changan Auto Launches L07/S07 Models in Bangkok, Southeast Asia Debut Set for Nov 29

November 28, 2023
SHEIN Covertly Files for US IPO, Valuation Could Surpass $80 Billion

SHEIN Covertly Files for US IPO, Valuation Could Surpass $80 Billion

November 28, 2023
DiDi App Crashed, Full Repair Pending 

DiDi App Crashed, Full Repair Pending 

November 28, 2023
Xiaomi Automobile’s Imminent Listing: New Retail Store Design Revealed

Xiaomi Automobile’s Imminent Listing: New Retail Store Design Revealed

November 28, 2023
NIOPhone Will Soon Support Google GMS Framework

NIOPhone Will Soon Support Google GMS Framework

November 28, 2023
Best Cyber Monday Chromebook deals

Best Cyber Monday Chromebook deals

November 28, 2023
Our top pick for the best Thunderbolt dock is $170 off today

Our top pick for the best Thunderbolt dock is $170 off today

November 28, 2023
This is the best Microsoft Office deal on Cyber Monday

This is the best Microsoft Office deal on Cyber Monday

November 28, 2023
Where to watch PSG vs Newcastle live stream, TV channel, lineups, betting odds for Champions League match

Where to watch PSG vs Newcastle live stream, TV channel, lineups, betting odds for Champions League match

November 28, 2023
When are the College Football Playoff rankings released? Time, channel for fifth CFP selection show in 2023

When are the College Football Playoff rankings released? Time, channel for fifth CFP selection show in 2023

November 28, 2023

Categories

Archives

November 2023
M T W T F S S
 12345
6789101112
13141516171819
20212223242526
27282930  
« Oct    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (6,518)
  • Entertainment (6,873)
  • General (5,056)
  • Health (3,093)
  • News (7,528)
  • Science (5,116)
  • Sports (6,897)
  • Tech (5,123)

Recent News

Changan Auto Launches L07/S07 Models in Bangkok, Southeast Asia Debut Set for Nov 29

Changan Auto Launches L07/S07 Models in Bangkok, Southeast Asia Debut Set for Nov 29

November 28, 2023
SHEIN Covertly Files for US IPO, Valuation Could Surpass $80 Billion

SHEIN Covertly Files for US IPO, Valuation Could Surpass $80 Billion

November 28, 2023
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version

Some exoplanets are shrinking. Here’s why- Some exoplanets are shrinking. Here’s why * Some exoplanets are shrinking. Here’s why | Some exoplanets are shrinking. Here’s why | Some exoplanets are shrinking. Here’s why | Some exoplanets are shrinking. Here’s why | Some exoplanets are shrinking. Here’s why | Some exoplanets are shrinking. Here’s why | Some exoplanets are shrinking. Here’s why | Some exoplanets are shrinking. Here’s why | | Some exoplanets are shrinking. Here’s why | | Some exoplanets are shrinking. Here’s why | | Some exoplanets are shrinking. Here’s why |