Life on earth depends on the sun?
Day after day we see its light and feel its warmth, but we do not often consider their origin. Yet there are many remarkable things about the sun. One is its distance from the earth; about ninety-three million miles. A journey of this distance, even if it could be made, would take several hundred years even in the fastest rocket.
The sun is a large star. The planet earth is very small in comparison. One hundred and nine globes the size of the earth would be stretch from one side of the sun to the other. The sun makes us feel hot, even at a distance of ninety-three million miles distance. This is not surprising. The temperature of the sun is about ten thousand degrees Fahrenheit.
But we receive only a small fraction of this heat.
The total heat of the sun could melt a column of ice a quarter of a mile thick and ninety-three million high in the second.
Will the galaxy get dark without the sun?
The brightness of the sun is equally astonishing. The sun gives such a bright light that 1,575,000,000,000,000 wax candles would be needed to give an equal light.
This is a very long row of figures that gives us some idea of the brilliance of the sun. As we said earlier, we receive only a very small portion of the sun's heat.
We also receive only a very small amount of its lights. This is sufficient for the globe trees, plants, and living creatures on earth. Excessive heat and light would destroy the balance of nature. The heat and light from the sun come in just the right quantities for life on earth.
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