A Sidereal day is the time from the sun leaving the sky till he appears again.

The farther the sun is up the longer it takes it to set and the days are longer in summer than when the sun is low down.

The weight of the earth is found by comparing a mass of known lead with that of a mass of unknown lead.

To find the weight of the earth take the length of a degree on a meridian and multiply by 62½ pounds.

The size of the earth is found by finding the horizontal parallax of the sun.

Abberation is if we saw a star and shot at it, the shot would not pass through the center but through the side.

The moon is 240 miles from the earth.

The moon’s nodes are the corners of the moon’s orbit.

The reason for believing that there are mountains on the moon is due to the shadows reflected on the earth.

The libration of the moon show the north, east, south, and west sides of the heavens.

The motions of the moon are found by watching the sun spots.

There can be an eclipse of the moon when the sun gets into the moon’s shadow.

Juniper is a very bright star.

Venus, Jupiter and perhaps the earth was known to the ancients.

Mars moves in his orbit at the rate of sixteen seconds a mile.

The earth is 1492 miles in circumference.

The spheres are to each other as the squares of their homologous sides.

Eclipses are caused whenever the obscuration of a body is passed by the shadow of some other body.

The planets shine with a steady light but the stars sprinkle.

The stars would cover up the whole heavens if they were all spread out so astronomers have concluded to arrange them in constellations.