2024年01月26日:毕宿一:有行星的恆星-(Epsilon Tauri: Star with Planet)

2024年01月26日:毕宿一:有行星的恆星-(Epsilon Tauri: Star with Planet)

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2024-01-26 / 0 评论 / 2 阅读 / 正在检测是否收录...

2024年01月26日:毕宿一:有行星的恆星-(Epsilon Tauri: Star with Planet)
2024年01月26日:毕宿一:有行星的恆星-(Epsilon Tauri: Star with Planet)--原图下载


Image Credit &Copyright: Reg Pratt
说明: 毕宿一距离我们146光年。毕宿一是K型的红巨星,温度比太阳低,半径约为太阳的13倍,光度则几乎是太阳的100倍。这颗专有名为艾因(Ain)的巨星,是毕宿疏散星团的成员之一,它与更明亮的巨星毕宿五构成金牛的眼睛。周围环绕着金牛座尘埃云的毕宿一,拥有一颗行星。2006年用径向速度量测法所发现的这颗行星毕宿一b,是一颗比木星大、轨道週期为1.6年的气态巨行星。虽然不能直接看到这颗系外行星,但在幽暗的夜晚,用肉眼可轻易见到它的母星毕宿一。

原文:

Image Credit &Copyright: Reg Pratt
Explanation: Epsilon Taurilies 146 light-years away.A K-typered giantstar, epsilon Tau is cooler than the Sun, but withabout 13 times the solar radius it shines with nearly 100 times the solarluminosity.A member of theHyadesopen star cluster the giant star is known by theproper name Ain,and along with brighter giant star Aldebaran,forms the eyes of Taurus the Bull.Surrounded by dusty, dark clouds in Taurus, epsilon Tauis also known to have a planet.Discovered byradial velocitymeasurements in 2006,epsilon Tauri bis a gas giant planet larger than Jupiterwith an orbital period of 1.6 years.And though the exoplanet can't be seen directly, on a dark nightits parent star epsilon Tauri is easily visible to the unaided eye.

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