急需天文方面的英语资料

太阳的!
The sun is an ordinary star, the Milky Way Chinese Communist Party hasapproximately 100 million such stars. Diameter: 1,3.90, million kilometers Quality: 1.989e30 kilogram Temperature: 5,800 opens (surface) 1.5,600, billion opens (core) The sun is in solar system the biggest object It hascompletely the solar system quality 99.8% (Jupiter to have surplusmajority of quality). Sun in many myths by personification: The ancient Greek person it isHelios, but the ancient Roman person it is Sol. Sun's quality is composed (atomic quantity by 75% hydrogen and 25%helium 92.1% is hydrogen, 7.8% for helium); Other matter (" Metal") The neon □ quantity assembles is only 0.1%. Transforms in thesolar core area hydrogen as the helium, but these quantities changesare very slow. The solar outer layer has the different period of rotation: Anequatorial plane 25.4 days rotations week; The two-pole area achieves36 day. This unusual phenomenon production is because the suncertainly