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Astronomers discovered a new planet with an important similarity to Earth - Yahoo Entertainment
Jun 09, 2021 1 min, 43 secs
Exoplanet discoveries used to be nothing but a dream for scientists, but new telescope technology and more advanced observation techniques have made the task of finding planets outside of our solar system easier than ever.

It’s called TOI-1231b, and it orbits a star much cooler than our own Sun.

The star, named NLTT 24399, is a red dwarf, so despite TOI-1231b being much closer to its star than Earth is to the Sun, the planet is actually similar in temperature, and it is thought to have a robust atmosphere that warrants future study.

The planet is referred to as a “sub-Neptune,” meaning that it’s smaller than Neptune but larger than Earth.

It’s not believed to be a primarily rocky world, so it’s not considered a Super Earth, but its atmosphere could still yield some very useful information for scientists.

“The low density of TOI 1231b indicates that it is surrounded by a substantial atmosphere rather than being a rocky planet.

But the composition and extent of this atmosphere are unknown,” Diana Dragomir, co-author of the work, said in a statement.

“TOI1231b could have a large hydrogen or hydrogen-helium atmosphere, or a denser water vapor atmosphere.

When peering deep into space, scientists find it much easier to spot planets orbiting smaller stars due to the influence that the planets have on the stars themselves.

In the case of a sub-Neptune planet orbiting a small, cool red dwarf star, the planet casts a large shadow when passing in front of its star, from our perspective.

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