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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.
Solar radius is a unit of distance used to express the size of stars in astronomy relative ... Sun: 1 695,700: Proxima Centauri: 0.1542 [17] 107,275: Jupiter: 0.1028 ...
The closest encounter to the Sun so far predicted is the low-mass orange dwarf star Gliese 710 / HIP 89825 with roughly 60% the mass of the Sun. [4] It is currently predicted to pass 0.1696 ± 0.0065 ly (10 635 ± 500 au) from the Sun in 1.290 ± 0.04 million years from the present, close enough to significantly disturb the Solar System's Oort ...
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]
Proxima Centauri is a red dwarf star and the nearest star to the Solar System. It is located 4.24 light-years away. Within the model's scale, it has a diameter of about 72 mm and is located 13 370 km away from Akaa. This ground distance takes it in the middle of Australia and near the famous Ayers Rock / Uluru.
The Oort cloud is thought to extend between 41 and 82 light-weeks out from the Sun light-year 365.25 light-days = 31 557 600 light-seconds 9 460 730 472 580 800 m: 9.461 × 10 12 km: 5.879 × 10 12 miles: Proxima Centauri is the nearest star to the Sun, about 4.24 light years away
That’s more than five times the distance from Earth to Neptune. It's almost unfathomably distant. But it’s still about 1600 times closer to us than the closest non-Sun star, Proxima Centauri ...
Though not visible to the naked eye, Proxima Centauri is the closest star to the Sun at a distance of 4.24 ly (1.30 pc), slightly closer than α Centauri AB. Currently, the distance between Proxima Centauri and α Centauri AB is about 13,000 AU (0.21 ly), [17] equivalent to about 430 times the radius of Neptune's orbit.