HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

The exoplanet HD 20794d swoops in and out of its habitable zone every few hundred days, making for an extreme climate.

Earth' exoplanet, HD 20794 d, was published in the scientific journal Astronomy & Astrophysics. Located approximately 19.7 light-years away from Earth in the Eridanus constellation, the exoplanet is ...