Artist's impression of Gliese 436b
![](https://cdn.sci.esa.int/documents/34247/35306/1567216161328-heic1515a_625.jpg)
Date: 24 June 2015
Satellite: Hubble Space Telescope
Depicts: Exoplanet Gliese 436b and its parent star Gliese 436
Copyright: NASA, ESA, STScI, and G. Bacon
This artist's concept shows the enormous comet-like cloud of hydrogen bleeding off of the warm, Neptune-sized planet Gliese 436b just 30 light-years from Earth. Also depicted is the parent star, which is a faint red dwarf named Gliese 436. The hydrogen is evaporating from the planet due to extreme radiation from the star. A phenomenon this large has never before been seen around any exoplanet.
Last Update: 1 September 2019