The shy giants

Ganymede-Juno2021-Perijove34_(1).jpg

Ganymede: The image is a montage of photos taken by the Juno spacecraft in June 2021. With a diameter of 5,268 kilometers, Jupiter’s satellite is the largest moon in the solar system – and yet a tiny one compared to an exomoon that astronomers probably discovered in the constellation Cygnus.
© NASA, JPL-Caltech, SwRI, MSSS, Kevin M. Gill

Planets of distant stars are likely to be orbited by giant moons that dwarf all satellites in the solar system.

by THORSTEN DAMBECK

Discoveries are the daily business of astronomers. This is largely due to increasingly powerful instruments and sophisticated methods used to observe the sky.

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