Precession is

The line of longitude (0 degrees)that runs from the north pole to the south pole and passes through Greenwich, England is the

What is the third step in the scientific method?

Summer begins when the sun is directly above the

The discovery that the planetary orbits are ellipses rather than circles was made by:

95 hm = mm

A statement that is considered an educated guess is the:

During which month is the sun directly over the Equator?

Kepler modified:

When a planet is closest to the sun in its orbit: