GJ 9827d Archives

Exoplanet GJ 9827d (artist’s concept) -- ESA

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Hubble Finds Water Vapour In The Atmosphere Of Small Exoplanet GJ 9827d

by Keith CowingDecember 29, 2024December 28, 2024

Astronomers using the NASA/ESA Hubble Space Telescope observed the smallest exoplanet where water vapour has been detected in its atmosphere. At only approximately twice Earth’s diameter, the planet GJ 9827d […]

This image is an artist’s concept of the exoplanet GJ 9827d, the smallest exoplanet where water vapour has been detected in the atmosphere. The planet could be an example of potential planets with water-rich atmospheres elsewhere in our galaxy. With only about twice Earth’s diameter, the planet orbits the red dwarf star GJ 9827. Two inner planets in the system are on the left. The background stars are plotted as they would be seen to the unaided eye looking back toward our Sun. However, the Sun is too faint to be seen. The blue star at the upper right is Regulus; the yellow star at the centre bottom is Denebola; and the blue star at the bottom right is Spica. The constellation Leo is on the left, and Virgo is on the right. Both constellations are distorted from our Earth-bound view from 97 light-years away. -- Credits: NASA, ESA, Leah Hustak (STScI), Ralf Crawford (STScI)

Astrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Press Release, Water/Hycean Worlds & Oceanography

Hubble Finds Water Vapour In The Atmosphere Of Small Exoplanet GJ 9827d

by Keith CowingJanuary 26, 2024January 26, 2024

Astronomers are intrigued when finding evidence of water vapour on exoplanets. Based on observations with the Hubble Space Telescope, a recent example is the planet GJ 9827d, which may have […]