Solar radius is a unit of distance used to express the size of stars in astronomy relative to the Sun. The solar radius is usually defined as the radius to the layer in the Sun's photosphere where the optical depth equals 2/3:[1]
695,700 kilometres (432,300 miles) is approximately 10 times the average radius of Jupiter, 109 times the radius of the Earth, and 1/215th of an astronomical unit, the approximate distance between Earth and the Sun. The solar radius to either pole and that to the equator differ slightly due to the Sun's rotation, which induces an oblateness in the order of 10 parts per million.[2]
^Cite error: The named reference Hab2008 was invoked but never defined (see the help page).
^"NASA RHESSI oblateness measurements 2012". Archived from the original on 2018-09-17. Retrieved 2017-07-12.
Solarradius is a unit of distance used to express the size of stars in astronomy relative to the Sun. The solarradius is usually defined as the radius...
from the center to about 0.2 of solarradius (139,000 km; 86,000 mi). It is the hottest part of the Sun and of the Solar System. It has a density of 150...
objects of the Solar System and partial lists of smaller objects by observed mean radius. These lists can be sorted according to an object's radius and mass...
is the irradiance received at the Earth (solar constant) multiplied by the area of the sphere whose radius is the mean distance between the Earth and...
(Solar mass), R☉ (Solarradius) and L☉ (Solar luminosity). The Sun is a G-type main-sequence star that makes up about 99.86% of the mass of the Solar System...
roughly of solarradius. The first detailed description of a solar prominence was in 14th-century Laurentian Codex, describing the solar eclipse of May...
perhaps only one solarradius (approx. 700,000 km) above the photosphere, suggesting that some additional mechanism accelerates the solar wind away from...
needed. For comparison, one Solarradius is equivalent to: 400 Lunar radius(RL) 109 Earth radius (R🜨) 9.955 Jupiter radius (RJ) Mamajek, E. E; Prsa, A;...
long-period comets, extending to a radius of 2,000–200,000 astronomical units (0.032–3.2 light-years). The closest star to the Solar System, Proxima Centauri,...
tachocline is located at a radius of at most 0.70 times the solarradius (measured from the core, i.e., the surface is at 1 solarradius), with a thickness of...
Schwarzschild radius will increase more quickly than its physical radius. When a body of this density has grown to around 136 million solar masses (1.36 × 108 M☉)...
solarradius. When a prominence is viewed against the Sun instead of space, it appears darker than the background. This formation is called a solar filament...
The Parker Solar Probe (PSP; previously Solar Probe, Solar Probe Plus or Solar Probe+) is a NASA space probe launched in 2018 with the mission of making...
paraboloidal one with focal length equal to half of the radius of curvature. Evacuated tube solar cookers are essentially vacuum sealed between two layers...
gravitation G to derive the solar mass to be approximately 1.9885×1030 kg. Although the exact values for the luminosity, radius, mass parameter, and mass...
similarities to the rocky planets of the inner solar system. The fourth-largest asteroid, Hygiea (radius 216.5±4 km), is icy. The question remains open...
astronomical unit is used primarily for measuring distances within the Solar System or around other stars. It is also a fundamental component in the...
the radius ranges from a maximum of nearly 6,378 km (3,963 mi) (equatorial radius, denoted a) to a minimum of nearly 6,357 km (3,950 mi) (polar radius, denoted...
planet in the Solar System or the combined mass of two binary stars can be calculated in units of Solar mass directly from the orbital radius and orbital...
Sun's surface. The solar wind elongates these loops to pointed tips which can extend a solarradius or more into the corona. During solar minimum, helmet...
distance R / ℓ {\displaystyle R/\ell } , where R {\displaystyle R} is the solarradius. To good approximation, they obey the so-called deep-water-wave dispersion...
rarely used. Instead, ad hoc non-metric units are used, such as the solarradius, astronomical units, light years, and parsecs; the astronomical unit...
galactic radii. It was found instead that it is metal poor inside the solarradius, but becomes more metal rich outside it. Additionally, recent observations...
discovered so far with radius calculated to be in excess of a thousand times the solarradius, and a luminosity of over 200,000 times the solar luminosity. If...
dwarfs are typically 0.8–2% the radius of the Sun; this is comparable to the Earth's radius of approximately 0.9% solarradius. A white dwarf, then, packs...
metallicity and a 0.1% solar luminosity variation. Stars with an age of 4.6 billion years are at the most stable state. Proper metallicity, radius, chemical composition...
features and any solarradius changes) derived from correlations with comic ray fluxes and cosmogenic isotopes. The finding that solar activity was approximately...
their own Hill sphere.[citation needed] Within the Solar System, the planet with the largest Hill radius is Neptune, with 116 million km, or 0.775 au; its...
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