description K2-18b Overview
K2-18b is a sub-Neptune exoplanet orbiting the M dwarf star K2-18. Located within its star’s habitable zone, it has garnered significant attention due to potential liquid water on its surface. Scientists are studying this planet to understand atmospheric compositions and assess conditions suitable for life, particularly focusing on “hycean” environments – those potentially containing oceans and substantial cloud cover. Research is primarily conducted by astronomers investigating exoplanets and the possibility of habitable worlds beyond our solar system.
help K2-18b FAQ
What did the James Webb Space Telescope find on exoplanet K2-18b?
In 2023, the James Webb Space Telescope (JWST) detected carbon-bearing molecules, including methane and carbon dioxide, in the atmosphere of K2-18b. The data also hinted at the presence of dimethyl sulfide, a molecule that on Earth is only produced by life.
Could K2-18b support human life or liquid water?
K2-18b orbits within its star's habitable zone, meaning temperatures could potentially allow for liquid water on its surface. However, scientists are still investigating whether it is a Hycean world (ocean-covered with a hydrogen atmosphere) or a mini-Neptune with a hostile environment.
How many light years away is the exoplanet K2-18b?
K2-18b is located approximately 124 light-years away from Earth in the constellation Leo. It was originally discovered in 2015 using data from the Kepler space telescope.
What type of star does K2-18b orbit?
The planet orbits K2-18, a red dwarf star (M dwarf) that is significantly smaller and cooler than our Sun. Because the star is so cool, the planet sits very close to it to maintain temperatures capable of supporting liquid water.
explore Explore More
Similar to K2-18b
See all arrow_forward
Reviews & Comments
Write a Review
Be the first to review
Share your thoughts with the community and help others make better decisions.
