Earth-sized planet discovered in 'our solar backyard'

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From: ScienceDaily.com
Earth-sized planet discovered in 'our solar backyard'

'It's a useful planet because it may be like an early Earth'

Date: January 14, 2024
Source: University of Wisconsin-Madison
Summary: Astronomers have discovered a planet closer and younger than any other Earth-sized world yet identified. It's a remarkably hot world whose proximity to our own planet and to a star like our sun mark it as a unique opportunity to study how planets evolve. ...

Here is what scientists know about the planet:
  • The planet is known as HD 63433d and it's the third planet found in orbit around a star called HD 63433.
  • HD 63433d is so close to its star, it completes a trip all the way around every 4.2 days.
  • "Even though it's really close-orbiting, we can use follow-up data to search for evidence of outgassing and atmospheric loss that could be important constraints on how terrestrial worlds evolve," (co-author Melinda) Soares-Furtado says. "But that's where the similarities end -- and end dramatically."
  • Based on its orbit, the astronomers are relatively certain HD 63433d is tidally locked, which means one side is perpetually facing its star.
  • That side can reach a brutal 2,300 degrees Fahrenheit and may flow with lava, while the opposite side is forever dark. ...
Read more at: Earth-sized planet discovered in 'our solar backyard' | Science Daily
 

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