The following gives the diameter of the sun and the known principal planets that revolve around it, together with the number of moons belonging to the several planets.

Heavenly Body.

Diameter Miles.

No. of Moods.

Sun ......

..882,000

......

Jupiter .....

..91,000

. .4 moons

Saturn .....

. 71,903.

. .8 moons

Neptune....

38,000

. 1 moon

Uranus .....

..34,331.

.6 moons

Venus .....

..7,621.

......

Mars ......

..4,222.

. .2 moons

Mercury ....

..2.984.

.......

Earth ......

..8,000 .

. 1 moon

Diameter of Earth's Moon, 2,162 miles.

Time Of Revolution

The following is the time of revolution of the various planets around the sun.

Planet.

Time in going around the sun.

Neptune .....

......164 1/2 years

Uranus ......

........84 years

Saturn .......

.......29 1/2 years

Jupiter .......

....... 12 years

Mars ........

.1 yr. 10 1/2 months

Earth ........

.........1 year

Venus .......

.......224 2-3 days

Mercury .....

........88 days

Our moon makes its revolution around the earth in 29 days, 12 hours, 14 minutes and 3 seconds, and is supposed to revolve once upon its own axis in that time.

Velocity Of Motion

The velocity of speed with which the various planets move through space as they go around the sun, is shown in the following:

Planet.

Miles per hour.

Mercury ...........

....110,725

Venus ..............

....80,000

Earth ...............

...68,000

jupiter .............

...30,000

Saturn .............

....22,309

Uranus .............

.... 15,000

Neptune ............

...12,000

Light moves at the rate of 192,000 miles a second, and yet passing with that velocity it would take three years and nine months to reach Alpha, the nearest star, which is nineteen trillions of miles away.