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The Planets, Showing their Relative Distances and Dimensions

The Planets, Showing their Relative Distances and Dimensions.jpg The Cause of TidesThumbnailsThe comparative sizes of the sun and the planetsThe Cause of TidesThumbnailsThe comparative sizes of the sun and the planetsThe Cause of TidesThumbnailsThe comparative sizes of the sun and the planets

(Drawn approximately to scale)

The isolation of the Solar System is very great. On the above scale the nearest star (at a distance of 25 trillions of miles) would be over one half mile away. The hours, days, and years are the measures of time as we use them; that is: Jupiter's "Day" (one rotation of the planet) is made in ten of our hours; Mercury's "Year" (one revolution of the planet around the Sun) is eighty-eight of our days. Mercury's "Day" and "Year" are the same. This planet turns always the same side to the Sun.

Author
The Project Gutenberg EBook of The Outline of Science, Vol. 1 (of 4), by J. Arthur Thomson
Published in 1922
Available from gutenberg.org
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