However, for other analysis, it is also possible to get access to the sunspots, their umbra and penumbra, as well as their area. It lies, on average, one astronomical unit ( AU ) from the Earth and is about half way through its main sequence lifetime of 10 Billion years. Its mean density is 1410 kg/m 3 or 0.255 times the mean density of Earth. For example, although the Solar System has a circumstellar habitable zone centered at 1.34 AU from the Sun, a star with 0.25 times the luminosity of the Sun would have a habitable zone centered at , or 0.5, the distance from the star, corresponding to a distance of 0.67 AU.

astronomical unit (AU): An astronomical unit (AU) is the mean distance between the center of the Earth and the center of the sun.

Instant free online tool for Sun's radius to meter conversion or vice versa. Planets In Order Of Size: Size relative to Earth.

The equatorial radius is the distance from the planet's/star's center to its equator and is often used to compare it with planets.

The Sun is the Earth’s dominant source light (and thus heat) and the star about which all of the planets of the solar system orbit. The Sun has mass 1.989 × 10 30 kg and a radius of ~700,000 km. Solar Atmosphere Surface Gas Pressure (top of photosphere): 0.868 mb Pressure at bottom of photosphere (optical depth = 1): 125 mb Effective temperature: 5772 K Temperature at top of photosphere: 4400 K Temperature at bottom of photosphere: 6600 K Temperature at top of chromosphere: ~30,000 K Photosphere thickness: ~500 km Chromosphere thickness: ~2500 km Sun … The solar white light images are analyzed here to estimate the Sun's radius. The definition of AU had been "the radius of an unperturbed circular Newtonian orbit about the sun of a particle having infinitesimal mass, moving with a … AU: 432,450: miles: 2.254 × 10 − 8: pc: Solar radius is a unit of distance used to express the size of stars in astronomy equal to the current radius of the Sun: ⊙ = × = The solar radius is approximately 695,500 kilometres (432,450 miles) or about 110 times the radius of the Yird, or 10 times the average radius o Jupiter. The diameter of the Sun is about 1,392,000 km, or about 109 times the diameter of the Earth.

Source: wikipedia Version 4.0 - Last updated: Sunday, August 16, 2015 Astronomical Unit (AU) is the distance when we measure it starting from the Earth and ending at the sun. The temperature at the surface of the Sun is about 5800 K, or 5,527 °C and the temperature at the center is about 1.55 x 10 7 K. By mass, about 74% of the Sun is hydrogen, 25% is helium and 1% is other elements.