HD 219134b – Astronomy Now

2 December 2024

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The closest rocky, transiting exoplanet found in Cassiopeia

31 July 2015 Astronomy Now

Northern Hemisphere astronomers are familiar with the W-shaped star pattern of Cassiopeia, a circumpolar constellation near the Pole Star that never sets for latitudes north of 35°. Tucked next to one leg of the W lies a modest 5th-magnitude star named HD 219134 that has been hiding a secret.