These are some of the questions that guide astronomers looking for planets outside our solar system, and this time they might have hit upon a jackpot. A planet that could have a very deep ocean has been discovered. What’s even more interesting is that it is an Earth-like planet.

Nearly 100 light years away from us, TOI-1452 b is orbiting two stars, unlike Earth, which goes around just one sun. The planet is 70 per cent larger than Earth, and roughly five times as massive, and astronomers have claimed that its density could be consistent with having a deep ocean.

No, a very deep ocean.

“That proportion is comparable to watery moons in our solar system Jupiter’s Ganymede and Callisto, or Saturn’s Titan and Enceladus believed to hide deep oceans under shells of ice,” Nasa said in a statement. The planet goes around its star in just 11 days, meaning a year here is just 11 days long.

Nasa added that observations indicate that because the red-dwarf star is smaller and cooler than our Sun, the planet receives a similar amount of light from its star as Venus does from our Sun, making it a case for liquid water to exist. Meanwhile, the other star in the orbit is so far it takes about 1,400 years to complete one circle.

Webb to the rescue

But to prove the existence of water beyond doubt, they need to conduct more observations. They speculate that the planet might be a huge rock, with little or no atmosphere. It could even be a rocky planet with an atmosphere of hydrogen and helium. The planet was found during observations by the Transiting Exoplanet Survey Satellite (TESS) and ground-based telescopes.

Astronomers are hopeful that they will study the planet in detail with the James Webb Space Telescope, as TOI-1452 b is just 100 light-years from us, which in astronomical terms is fairly close.

“It’s relatively bright star should allow Webb to capture a spectrum of starlight shining through its atmosphere, a kind of fingerprint of atmospheric components. It also appears in a part of the sky, in the constellation Draco, that Webb can observe almost any time of year,” Nasa said.


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