TESS discovers Saturn-like planet orbiting an M-dwarf star

https://phys.org/news/2023-11-tess-saturn-like-planet-orbiting-m-dwarf.html

by wglb • 3 years ago

51 12 3 years ago

wglb• 3 years ago

The original paper is at https://arxiv.org/abs/2310.20634

svachalek• 3 years ago

I thought this was going to be about the detection of a giant ring system around an exoplanet, but it's merely in reference to diameter and mass. Maybe that's a particularly interesting size for an exoplanet but as far as I know it's not.

acolderentity• 3 years ago

Does TESS know of any habitable planets in that system?

rnk• 3 years ago

Define habitable. It seems hard to detect planets that are in the life zone (not too far, not too close) and small enough to be somewhat similar.

dylan6042• 3 years ago

wow, that is disappointing, as Saturn is much more known for its rings than its size. Yes, most people will know Saturn is much larger than Earth, but "Survey Says!" top response on the board will be "rings". Jupiter would probably be "storm" or "big" would be my guess.

echelon• 3 years ago

It seems hard to detect planets that are in the life zone (not too far, not too close) and small enough to be somewhat similar. reply

Maybe this is why we (presumably) haven't been detected ourselves.

euroderf• 3 years ago

Saturn should be known for being undense enough to float.

bmitc• 3 years ago

We can barely detect exoplanets, much less rings on them. Even Saturn's rings were only recently better understood.

moomin• 3 years ago

It seems from the article that GEMs are an interesting research area, but it doesn’t explain why. Could anyone ELI5?

suprjami• 3 years ago

A planetary/life theory suggests Jupiter and Saturn are the protectors of the inner planets. These huge gas giants capture large solid masses whizzing around in space and either swallow those masses or turn them into moons. Without these giants acting like the solar system's vacuum cleaners, it's much more likely for an inner planet like Earth to be struck and destroyed, which would be catastrophic for life on that inner planet.

So assuming life in the universe takes a similar form to ours (liquid water, stable star) if we look for solar systems like ours with big outer vacuum cleaner planets, the chances of any inner planets in the Goldilocks zone having life are higher.

TESS discovers Saturn-like planet orbiting an M-dwarf star

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