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Webb Detects Possible Biosignature Gases in Atmosphere of K2-18b

Astronomers using the NASA/ESA/CSA James Webb Space Telescope have detected the chemical fingerprints of dimethyl sulfide (DMS) and/or dimethyl disulfide (DMDS) in the atmosphere of the super-Earth exoplanet K2-18b. On Earth, DMS and DMDS are only produced by life, primarily microbial life such as marine phytoplankton. While an unknown chemical process may be the source of these molecules in K2-18b’s atmosphere, the results are the strongest evidence yet that life may exist on an extrasolar planet.

K2-18 is a red dwarf located approximately 111 light-years away in the constellation of Leo.

Also known as EPIC 201912552, the star hosts two massive exoplanets: K2-18b and K2-18c.

First discovered in 2015, K2-18b has a radius of 2.6 times that of Earth and is about 8.6 times as massive.

The planet orbits its star every 33 days at a distance of approximately 0.15 AU and has an Earth Similarity Index of 0.73.

It receives 1.28 times the light intensity of Earth, and its equilibrium temperature is minus 2 degrees Celsius (28 degrees Fahrenheit).

Earlier observations of K2-18b identified methane and carbon dioxide in its atmosphere. This was the first time that carbon-based molecules were discovered in the atmosphere of an exoplanet in the habitable zone.

Those results were consistent with predictions for a Hycean world: a habitable ocean-covered exoplanet underneath a hydrogen-rich atmosphere.

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thoughts on

please for the love of god turn them back off

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Control (2019), Remedy Entertainment

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Who'll survive the blood red power play? Who'll take control, whose name will be known?

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hate coming to terms with things. i should be able to cast a fireball instead

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You ever get tired of a week before it even begins

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there’s another fucking week this week

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The Lost Children Orlando von Einsiedel, Lali Houghton, Jorge Duran Colombia, 2024

Wilson 💔🥀

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Lioness | 1.05

they making it real hard for me to focus on the plot

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ZOE SALDANA special ops: lioness / 2.02

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Moonbear, I can’t put into words how much I’ve missed you. If you’re hearing this, you know where it’s transmitting from. Two years ago, the Outward colony lost connection to ARK Labos, our main power source. I’m stationed at ARK Vita. The same ship you saw on the moon when you were little, remember? […] I’m still alive. Come find me. Please.

↳  Deliver Us Mars (2023) dev. KeokeN Interactive

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What are we trying to save if we ourselves just end up destroying it?

↳ Deliver Us Mars (2023) dev. KeokeN Interactive

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feeling this going into 2025

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Forrest Gump (1994) dir. by Robert Zemeckis

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new years eve!!! wooo!!! go crazy go wild! 🥳🥳🥳