James Webb Space Telescope

Interstellar comet 3I/ATLAS in Webb's infrared observation, with mapping of water, carbon dioxide, and methane

Webb Detects Methane in Interstellar Comet: Hint at Chemistry Formed in Another Solar System

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New Webb observations of interstellar comet reveal unusually abundant methane and carbon dioxide, providing glimpse into chemistry of another planetary system
An artist's impression of the exoplanet K2-18b, a world larger than Earth orbiting a red dwarf and being studied in search of possible signs of life or technological signatures.

K2-18b Scanned for Alien Signals – But No Technological Signature Found

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SETI researchers used the VLA and MeerKAT telescope to search for narrow radio signals from the intriguing exoplanet. None survived the noise filters, but the method will be used in future searches
A Dyson sphere is a hypothetical megastructure built by an advanced civilization to capture the vast amounts of energy emitted by a star. Illustration: depositphotos.com

Are the coldest "stars" in the galaxy alien megastructures?

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Astronomers propose a new way to identify alien megastructures: look for extremely cold "stars" that emit mostly infrared light and appear free of dust.
Clouds made of minerals condense and evaporate on the planet WASP-94A b

This exoplanet has rocky clouds that evaporate before sunset

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The James Webb Space Telescope has revealed an extreme weather cycle on the exoplanet WASP-94A b: clouds made of rock-forming minerals thicken in the morning, but evaporate or sink as the atmosphere moves to the warm side of the
An artist's impression of the planet K2-18b orbiting a red dwarf star 124 light-years away. The planet is thought to have a thick gas envelope and no global ocean. Credit: ESA/Hubble, M. Kornmesser

Earth may not be so special – new study challenges previous assumptions about water on distant planets

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