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The ejection of the outer mass and the creation of a planetary nebula finally ends the red-giant phase of the star's evolution. [10] The red-giant phase typically lasts only around a billion years in total for a solar mass star, almost all of which is spent on the red-giant branch.
Page information; Get shortened URL; Download QR code; Print/export Download as PDF; Printable version ... A red giant is a luminous giant star of low or intermediate ...
HD 18438 is a red giant star in the deep northern constellation of Cepheus, located about 730 light-years (220 parsecs) from Earth.With an apparent magnitude of 5.49, it is visible by the naked eye under dark skies as a red-hued dot of light about 10 degrees away from the celestial north pole.
The nearest white giant. Capella A 42.919 ± 0.049 [9] G8III [9] 11.98 ± 0.57 [9] 2.569 ± 0.007 [9] 0.03 [10] The nearest yellow giant, together with Capella A. With a magnitude of 0.08, [11] the Capella star system is the 6th-brightest star in the night sky. Capella B G0III [9] 8.83 ± 0.33 [9] 2.483 ± 0.007 [9] 0.16 [10] The nearest yellow ...
It is a red giant star of the spectral type M5III, currently at the last stages of evolution. It is much larger and brighter, yet cooler, than the Sun. In the near-infrared J band, it is brighter than the nearby Vega. R Lyrae is unusual in that it is a red star with a high proper motion, greater than 50 milliarcseconds a year. [8]
R Doradus (HD 29712 or P Doradus) is a red giant variable star in the far-southern constellation Dorado, close to the border with Reticulum. Its distance from Earth is 178 light-years (55 parsecs). Having a uniform disk diameter of 57 ± 5 mas, it is thought to be the extrasolar star with the largest apparent size as viewed from Earth.
New examinations of this behemoth star suggest it is both smaller — and closer — than astronomers believed. This red giant star will, one day, explode as a supernova. However, it is ...
Mira was historically thought to be a red supergiant star, but is now widely accepted to be an asymptotic giant branch star. [32] Some red supergiants are larger and more luminous, with radii exceeding over a thousand times that of the Sun. These are hence also referred to as red hypergiants: Mu Cephei; VV Cephei A; NML Cygni; S Persei; UY Scuti