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physical object > naked eye object > Sun

Sun
subject			fact

Sun	is a part of our solar system
	has spectral type G2
	has energy source proton-proton reaction
	has surface temperature 5785 K
	has apparent magnitude -26.74
	is a part of our solar system
	has age 4.6 billion years
	has radius 695990 km
	has magnetic field 1-2 gauss as high as 10-1000 gauss in active regions
	has velocity relative to nearby stars 20 km s-1 toward R.A. 18h4m, declination +30° (towards in Hercules)
	has galactic orbital velocity Vorb = 250-300 km s-1
	has galactic orbital period 220 million years (e ≈ 0)
	has distance from galactic plane 35 light-years
	has distance from galactic center 27000 light-years
	has energy generating mass 0.35 Msun
	has central temperature 14-15 × 106 K
	has central density 155 g cm-3 (Bahcall 1973)
	has inclination of rotational axis to pole of ecliptic 7°15'
	has surface gravity 27398 cm s-2
	has escape velocity Vesc = 618 km s-1
	has mean rotation speed 1.9 km s-1
	has rotational period at poles 35 days
	has rotational period at equator 24d6h
	has density at surface 3 × 10-7 g cm-3
	has mean density 1.409 g cm-3
	has luminosity 3.83 × 1033 ergs s-1
	has absolute bolometric magnitude Mbol = +4.67
	has absolute visual magnitude Mv = +4.85
	has luminosity class V (main-sequence)
	is a part of Zodiac
	is a part of our solar system
	has mass 1.989 × 1033 g
	has definition Star that Earth orbits. Central body of solar system. It takes about 1-10 million years for photons to diffuse from the Sun's interior to its surface. About 3% of the energy radiated is in the form of neutrinos. Every second about 655 million tons of H are being converted into 650 million tons of He. A grazing light ray is deflected 1".7 by the Sun. If the total angular momentum of the solar system were concentrated in the Sun, its equatorial rotation speed would be about 100 km s-1.
	is an instance of G star
	is an instance of dwarf
	is an instance of Population I star
	is an instance of naked eye object
dwarf	has symbol d
	has synonym main sequence star
Population I star	has author Baade (1944)
	is a part of disk
	has synonym arm population
	has synonym disk star
G star	has color yellowish
star	has star surface temperature
	has V magnitude
	has B magnitude
	has U magnitude
	has position on celestial sphere from the point of view of Earth
	has parallax from the point of view of Earth's orbit
	has proper motion
	has radiation at surface which is diffused out from the hotter core
	has energy production which takes place primarily within the core
	has surface density which depends on luminosity class
	has absolute magnitude
	has catalog star catalog
	has material hydrogen, helium
	has velocity determined from proper motion and radial velocity
physical object	has location or center of gravity
	has angular momentum
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material
celestial body	has spectra

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