Solar System

The Sun is an ordinary G2 star, one of more than 100 billion stars in our galaxy. diameter: 1,390,000 km. mass: 1.989e30 kg temperature: 5800 K (surface) 15,600,000 K (core) The Sun is by far the largest object in the solar system. It contains more than 99.8% of the total mass of the Solar System (Jupiter contains most of the rest). The Sun is personified in many mythologies: the Greeks called it Helios and the Romans called it Sol. The …

…number of smaller objects orbiting the Sun. (Exactly which bodies should be classified as planets and which as "smaller objects" has been the source of some controversy, but in the end it is really only a matter of definition.) Distance Radius Mass Planet (000 km) (km) (kg) Discoverer Date --------- --------- ------ ------- ---------- ----- Mercury 57,910 2439 3.30e23 Venus 108,200 6052 4.87e24 Earth 149,600 6378 5.98e24 Mars 227,940 3397 6.42e23 Jupiter 778,330 71492 1.90e27 Saturn 1,426,940 60268 5.69e26 Uranus 2,870,990 25559 8.69e25 Herschel 1781 Neptune 4,497,070 24764 1.02e26 Galle 1846 Pluto 5,913,520 1160 1.31e22 Tombaugh 1930