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Exomoon orbiting its planet (artist's impression)

Exomoon orbiting its planet (artist's impression)

Date: 03 October 2018
Satellite: Hubble Space Telescope
Copyright: NASA, ESA, and L. Hustak (STScI)

This artist's impression depicts the exomoon candidate Kepler-1625b-i, the planet it is orbiting and the star in the centre of the star system. Kepler-1625b-i is the first exomoon candidate and, if confirmed, the first moon to be found outside the Solar System.

Like many exoplanets, Kepler-1625b-i was discovered using the transit method. Exomoons are difficult to find because they are smaller than their companion planets, so their transit signal is weak, and their position in the system changes with each transit because of their orbit. This requires extensive modelling and data analysis.

Last Update: 1 September 2019
25-May-2024 10:21 UT

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