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Astronomers discover a planet that appears too large to be in orbit around its star!

Posted on December 3, 2023 By Haley Bennett

A groundbreaking discovery has been made by a group of astronomers who have identified a planet over 13 times the mass of Earth in orbit around an ultracool dwarf star named LHS 3154, which is only nine times less massive than the Sun. This finding challenges existing models and marks the most substantial planet ever found closely orbiting an ultracool dwarf star.

To understand the complexity of this discovery, it’s essential to revisit our understanding of planet formation. Initially, an abundance of gas and dust existed before stars emerged. These particles gradually merged, forming larger structures that eventually gave rise to the massive celestial bodies we observe today. Current theories propose that planets originate from the remnants of gas and dust left after star formation. However, the planet-forming disk around the petite LHS 3154 is not anticipated to possess sufficient solid mass to generate a planet as massive as LHS 3154b. This raises the fundamental question: from where did it originate?

In fact, the dust mass and dust-to-gas ratio in the disk surrounding stars like LHS 3154 would need to be ten times higher than observed to birth a planet of LHS 3154b’s magnitude. This implies the existence of other, unknown processes that can lead to the development of massive planets around low-mass stars.

The planet, named LHS 3154b, was identified using the Habitable Zone Planet Finder (HPF), an astronomical spectrograph designed to detect planets with potentially liquid water orbiting the coolest stars beyond our solar system. Typically, locating such planets poses a challenge. However, the lower temperatures of ultracool stars allow liquid-carrying planets to orbit much closer than our Sun would allow for Earth, making interactions between the star and planet more accessible for scientists to observe and confirm the presence of these distant worlds.

Megan Delamer, a co-author of the study, remarked, “Based on current survey work with the HPF and other instruments, an object like the one we discovered is likely extremely rare, so detecting it has been really exciting. Our current theories of planet formation have trouble accounting for what we’re seeing.”

Haley Bennett

I have over 10 years of experience in the cryptocurrency industry and I have been on the list of the top authors on LinkedIn for the past 5 years. I have a wealth of knowledge to share with my readers, and my goal is to help them navigate the ever-changing world of cryptocurrencies.

Business Tags:earth, exoplanet, gravity, habitable zone planet finder, lhs 3154, planet, space, space water, sun, ultracool dwarf star

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