... The scene is anchored right and left by two bright stars, Mu and Eta Geminorum, at the foot of the celestial twin while the Jellyfish Nebula is the brighter arcing ridge of emission with dangling tentacles below and right of center. ... How did the Eta Carinae star system create this unusual expanding nebula? ... About 170 years ago, the southern star system Eta Carinae (Eta Car) mysteriously became the second brightest star system in the night sky. ... Stars and Dust Pillars in NGC 7822 from WISE ....