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The size of solid bodies does not include an object's atmosphere. For example, Titan looks bigger than Ganymede, but its solid body is smaller. For the giant planets , the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure.
Size comparison of the Sun, all the planets of the Solar System and some larger stars. The Sun is 1.4 million kilometers (4.643 light-seconds) wide, about 109 times wider than Earth, or four times the Lunar distance, and contains 99.86% of all Solar System mass. The Sun is a G-type main-sequence star that makes up about 99.86% of the mass of ...
Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,300 mi). [1] The Sun, the orbit of Earth, Jupiter, and Neptune, compared to four stars (Pistol Star, Rho Cassiopeiae, Betelgeuse, and VY Canis Majoris)
No stellar companion, because the Sun itself is a solitary star; An age within 1 billion years from that of the Sun (3.6 to 5.6 Ga) Other Sun parameters: [54] Sun rotates on its axis once in about 27 days or 1.997 kilometres (1.241 mi)/s; Sun radius is 700,000 kilometres (430,000 mi)
Size comparison between the diameter of the Sun and VY Canis Majoris, a hypergiant which is among the largest known stars (possibly the largest in the Milky Way). K to M type spectra, the largest known stars by radius.
It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies and black holes. More precisely, the mass of the Sun is More precisely, the mass of the Sun is nominal solar mass M ☉ = 1.988 416 × 10 30 kg or a best estimate of M ☉ = (1.988 475 ± 0.000 092 ) × 10 30 kg .
Size comparison of μ Cephei and the Sun. A very luminous red supergiant, Mu Cephei is among the largest stars visible to the naked eye, and one of the largest known cool supergiants. It is a runaway star with a peculiar velocity of 80.7 ± 17.7 km/s, [16] and has been described as a hypergiant. [4]
Stars that are at least sometimes visible to the unaided eye have their apparent magnitude (6.5 or brighter) highlighted in blue. The first list gives stars that are estimated to be 60 M ☉ or larger; the majority of which are shown. The second list includes some notable stars which are below 60 M ☉ for the purpose of comparison. The method ...