天苑四
Epsilon Eridani b, also known as Ægir, is an exoplanet approximately 10.5 light-years away orbiting the star Epsilon Eridani, in the constellation of Eridanus (the River). The planet was discovered in 2000, and as of 2019 remains the only confirmed planet in its planetary system. It orbits at around 3.5 AU with a period of around 7.4 years, and has a mass around 1.2 times that of Jupiter.