Kentauran explorers found a habitable world in the Epsilon Eridani system 760 BCE. The Republic of Kentaurus established a colony there 10 years later, but the colony's inhabitants were killed to the last Kentauran by a Na'Tari ground assault in 425 BCE.
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Light from Epsilon Eridani silhouettes debris in one of the star's two asteroid belts.
Credit: NASA/JPL-Caltech
Epsilon Eridani is a K-class star about 28 percent as bright as Sol and 85 percent as massive. The still-habitable world of Epsilon Eridani II orbits its parent star at a distance of 75 million kilometers, about half the distance at which Earth orbits its sun. The star is approximately 1 billion years old and has a stellar wind about 30 times as strong as Sol's. Epsilon Eridani II's magnetic field is 1.5 times stronger than Earth's, but life on the planet has had to adapt to much higher levels of radiation than humans can withstand.