Possible Moon Outside Our Solar System (Artist’s Interpretation)

Artist's Illustration of Kepler-1625 System

Artist's Illustration of Possible Moon Outside Our Solar System This is an artist's illustration of the gas giant planet Kepler-1625b and a suspected accompanying moon. Estimated to be as big as the planet Neptune, the moon is unlike anything found inside our solar system. It...

Transit of Kepler-1625b and Suspected Moon

This diagram represents Hubble Space Telescope photometric observations of the planet Kepler-1625b passing in front of its parent star — called a transit. The planet blocks a small fraction of the star's light and this is recorded on a light curve (bottom green line) as a slight...

Animation of Hubble Transit Data of Potential Exomoon

This animation represents the Hubble data and their best-fit light curve for the transit of exoplanet Kepler-1625b and its possible moon.

Did the Hubble Telescope Confirm the First Exomoon?

The Hubble and Kepler space telescopes found evidence for what could be a giant moon accompanying a gas-giant planet that orbits the star Kepler-1625, located 8,000 light-years away in the constellation Cygnus. The moon may be as big as Neptune and it orbits a planet several...