[Page 274] SOME ELEMENTS OF THE SOLAR SYSTEM ------------------------------------------------------------------------ | | | | Mean Dist. | | | | | | | from Sun. | | | | | | |-------------------| Mean |Density.| | | | | Earth's| |Diameter |[Earth] | | Name. | Sign. | Masses. | Dist. | Millions |in Miles.| = 1. | | | | | as 1. | of Miles.| | | |-----------|--------|------------|--------|----------|---------|--------| | Sun |[Symbol]| Unity | | | 860,000 | 0.255 | | Mercury |[Symbol]|1/5000000(?)| 0.387 | 35-3/4| 2,992 | 1.21 | | Venus |[Symbol]| 1/425000 | 0.723 | 66-3/4| 7,660 | 0.85 | | Earth |[Symbol]| 1/326800 | 1. | 92-1/3| 7,918 | 1. | | Mars |[Symbol]| 1/2950000 | 1.523 | 141 | 4,211 | 0.737 | | Asteroids | (No.) | | | | | | | Jupiter |[Symbol]| 1/1047 | 5.203 | 480 | 86,000 | 0.243 | | Saturn |[Symbol]| 1/3501 | 9.538 | 881 | 70,500 | 0.133 | | Uranus |[Symbol]| 1/22600 | 19.183 | 1771 | 31,700 | 0.226 | | Neptune |[Symbol]| 1/19380 | 30.054 | 2775 | 34,500 | 0.204 | ------------------------------------------------------------------------ ------------------------------------------------------------- | | | Gravity | | | | | Axial | at | | Orbital | | | Revolu- | Surface. | Periodic | Velocity | | Name. | tion | [Earth] | Time. | in Miles | | | | = 1 | | per sec. | |-----------|---------------|----------|-----------|----------| | Sun | 25 to 26d | 27.71 | | | | Mercury | 24h 5m(?) | 0.46 | 87.97d | 29.55 | | Venus | 23h 21m(?) | 0.82 | 224.70d | 21.61 | | Earth | 23h 56m 4s | 1. | 365.26d | 18.38 | | Mars | 24h 37m 22.7s | 0.39 | 686.98d | 14.99 | | Asteroids | | | | | | Jupiter | 9h 55m 20s | 2.64 | 11.86yrs | 8.06 | | Saturn | 10h 14m | 1.18 | 29.46yrs | 5.95 | | Uranus | Unknown. | 0.90 | 84.02yrs | 4.20 | | Neptune | Unknown. | 0.89 | 164.78yrs | 3.36 | ------------------------------------------------------------- [Page 275] EXPLANATION OF ASTRONOMICAL SYMBOLS. SIGNS OF THE ZODIAC