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Proxima Centauri is a red dwarf star with a mass about 12.5% of the Sun's mass (M ☉), and average density about 33 times that of the Sun. Because of Proxima Centauri's proximity to Earth, its angular diameter can be measured directly. Its actual diameter is about one-seventh (14%) the diameter of the Sun.
Proxima Centauri b is the closest exoplanet to Earth, [20] at a distance of about 4.2 ly (1.3 parsecs). [5] It orbits Proxima Centauri every 11.186 Earth days at a distance of about 0.049 AU, [1] over 20 times closer to Proxima Centauri than Earth is to the Sun. [21] As of 2021, it is unclear whether it has an eccentricity [e] [24] but Proxima Centauri b is unlikely to have any obliquity. [25]
Proxima Centauri: 4.24 [1] ... The first star to have its distance to Earth measured after the Sun. Also the 15th nearest stellar system to our solar system. B K7V [59]
The closest system is Alpha Centauri, with Proxima Centauri as the closest star in that system, at 4.2465 light-years from Earth. The brightest, most massive and most luminous object among those 131 is Sirius A , which is also the brightest star in Earth's night sky ; its white dwarf companion Sirius B is the hottest object among them.
Solar radius is a unit of distance used to express the ... radius and effective temperature compared to the present-day Sun. ... Sun: 1 695,700: Proxima Centauri: 0.1542
The nearest star, Proxima Centauri, is about 1.3 parsecs (4.2 light-years) from the Sun: from that distance, the gap between the Earth and the Sun spans slightly less than 1 / 3600 of one degree of view. [11]
Proxima Centauri c is a super-Earth or mini-Neptune about 7 times as massive as Earth, orbiting at roughly 1.49 AU (223 million km; 139 million mi) every 1,928 days (5.28 yr). [3] Due to its large mass and its distance from Proxima Centauri, the exoplanet is uninhabitable and too cold for liquid water to exist on the surface, with an ...
Gaia BH1 is 1,560 light-years away from Earth in the direction of the constellation Ophiuchus. [3] For comparison, the nearest star to the Sun (Proxima Centauri) is about 4.24 light years away, and the Milky Way galaxy is approximately 100,000 light years in diameter.