What motion describes both the earths orbit around the sun and the Moon's orbit around the earth?

Answer 1

Earth orbits the Sun at an average distance of about 150 million kilometers every 365.2564 mean solar days, or one sidereal year. From Earth, this gives an apparent movement of the Sun eastward with respect to the stars at a rate of about 1°/day, or a Sun or Moon diameter every 12 hours. Because of this motion, on average it takes 24 hours-a solar day-for Earth to complete a full rotation about its axis so that the Sun returns to the meridian. The orbital speed of the Earth averages about 30 km/s (108,000 km/h), which is fast enough to cover the planet's diameter (about 12,600 km) in seven minutes, and the distance to the Moon (384,000 km) in four hours. Viewed from a vantage point above the north poles of both the Sun and the Earth, the Earth appears to revolve in a counterclockwise direction about the Sun. From the same vantage point both the Earth and the Sun would appear to rotate in a counterclockwise direction about their respective axes. By astronomical convention, the four seasons are determined by the solstices-the point in the orbit of maximum axial tilt toward or away from the Sun-and the equinoxes, when the direction of the tilt and the direction to the Sun are perpendicular. Winter solstice occurs on about December 21, summer solstice is near June 21, spring equinox is around March 20 and autumnal equinox is about September 23. The axial tilt in the Southern Hemisphere is exactly the opposite of the direction in the northern hemisphere. Thus the seasonal effects in the south are reversed. In modern times, Earth's perihelion occurs around January 3, and the aphelion around July 4 (for other eras, see precession and Milankovitch cycles). The changing Earth-Sun distance results in an increase of about 6.9% in solar energy reaching the Earth at perihelion relative to aphelion. Since the southern hemisphere is tilted toward the Sun at about the same time that the Earth reaches the closest approach to the Sun, the southern hemisphere receives slightly more energy from the Sun than does the northern over the course of a year. However, this effect is much less significant than the total energy change due to the axial tilt, and most of the excess energy is absorbed by the higher proportion of water in the southern hemisphere. Earth, along with the Solar System, is situated in the Milky Way galaxy, orbiting about 28,000 light years from the center of the galaxy, and about 20 light years above the galaxy's equatorial plane in the Orion spiral arm.

Answer 2

Every point on the earth moves toward the east.

If you're hanging over the north pole looking down, you see the earth spinning

counter-clockwise (to your left).

If you're hanging over the south pole looking down, you see the earth spinning

clockwise (to your right).

Answer 3

The Earth spins on a central point called an axis, this spinning is called rotation. It takes the Earth about 24 hours to make a complete rotation. The Earth rotates at a speed of about 1000 mph.

Answer 4

A day...I hope that is what you are going for there.

Answer 5

The spinning of the Earth is called rotating and when the Earth rotates around the Sun, this is called revolving.

Answer 6

one orbit around the sun is equal to a year, which is 365.2564 earth rotations(days)

Answer 7

the earth's spinning motion is called its rotation.

Answer 8

revolution i just had that exact phrase for an online exam for geology.

Answer 9

Rotation is, I suspect, the word you're looking for.

Answer 10

An elliptical orbit which is an acceleration.