PIA18927: Double Date: Two Pairs of Stars in One System
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 Produced By:  JPL
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The four stars and one planet of the 30 Ari system are illustrated in this diagram. This quadruple star system consists of two pairs of stars: 30 Ari B and 30 Ari A. A gas giant planet (red) orbits one of the stars in 30 Ari B about once a year. New observations led by NASA's Jet Propulsion Laboratory in Pasadena, California, identified the fourth star in the system (green); the three others stars and the planet were previously known. This is the second quadruple star system known to host a planet.

The orbits shown are only approximations and are not as circular as they appear. Distances are not drawn to scale.

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