Solar Facts

1. Mercury - Roman Mythology - a god, often identified with the Greek god Hermes, serving as messenger to the other gods and being the god of commerce, travel, and thievery. Middle English Mercurie from Middle Latin Mercurius (Symbol Hg). A silvery white, poisonous metallic element liquid at room temperature. Atomic number 80, atomic weight 200.59. The smallest of the planets, with a sidereal period of revolution about the Sun of 88 days at a mean distance of 36.2 million miles, a mean radius of approximately 1,500 miles and a mass approximately 0.05 that of Earth.

2. Venus - Roman Mythology - the goddess of love and beauty identified with the Greek goddess Aphrodite. The second planet from the Sun, having an average radius of 3,800 miles, a mass of 0.816 times that of the earth and a sidereal period of revolution about the sun of 224.7 days at a mean distance of approximately 67.2 million miles.

3. Earth - Middle English - erth; old English - eorthe. The third planet from the sun, having a sidereal period of revolution about the sun of 365.26 days at a mean distance of 92.96 million miles, an axial rotation period of 23 hours 56.07 minutes an average radius of 3,959 miles and a mass of 13.17 x 10" pounds. (6 sex tillion tons a unit followed by 21 cipher)

4. Mars - Roman Mythology - the god of war, identified with the Greek god Aries. The fourth planet from the sun, having a sidereal period of revolution about the sun of 687 days at a mean distance of 141.6 million miles, a mean radius of approximately 2,090 miles, and a mass approximately 0.15 that of earth.

5. Jupiter - Roman Mythology - the supreme god, patron of the Roman state, brother and husband of Juno, identified with the Greek god Zeus. Also called Jove or Deiw. The fifth planet from the sun; the largest and most massive in the solar system, having a diameter of approximately 86,000 miles, a mass approximately 318 times that of earth, and a sidereal period of revolution about the sun of 11.86 years at a mean distance of 483 million miles.

6. Saturn - An Italic and Roman deity identified with the Greek god Cronus. Reign of Saturn, the Golden Age. Saturn the planet of Etruscan origin. The sixth planet from the sun and the second largest in the solar system, having a diameter of 74,000 miles, a mass 95 times that of earth and an orbital period of 29.5 years, at a mean distance of about 886,000,000 miles. It has nine satellites and is encircled by a system of rings composed of many small solid bodies.

7. Uranus - Greek Mythology - the earliest supreme god, a personification of the sky, who was the son and consort of Gaea and the father of the Cyclopes and Titans. Latin Uranus from Greek Ouranos, personification of Ouranos is heaven. The seventh planet from the sun revolving about it every 84.02 years, at a distance of approximately 1,790,000,000 miles. It has an equatorial diameter of 30,000 miles, a mass 14.6 times that of earth and five satellites.

8. Neptune - Roman Mythology - the god of the sea corresponding to the Greek Poseidon [Latin Neptunus]. The eighth planet from the sun, having a sidereal period of revolution around toe sun of 164.8 years, at a mean distance of 2.8 billion (2.8 x 101) miles a mean radius of 14,000 miles, and a density 17.2 times that of earth.

9. Pluto - Roman Mythology - the god of the dead and the ruler of the underworld, identified with the Greek god Hades [Latin, from Greek Plouton "the rich one," from ploutos, wealth]. The ninth planet from the sun, having a sidereal period of revolution about the sun of 248.4 years, 2.8 billion miles distant at perihelion and 4.6 billion miles at aphelion, and a diameter approximately half that of the earth.