2007-05-19 15:57:42 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
The earth rotates once every 23 hours, 56 minutes and 4.09053 seconds, called the sidereal period, and its circumference is roughly 40,075 kilometers. Thus, the surface of the earth at the equator moves at a speed of 460 meters per second--or roughly 1,000 miles per hour.
The earth is moving with respect to the cosmic microwave background radiation at a speed of 390 kilometers per second.
2007-05-19 16:02:32 · answer #1 · answered by James 3 · 0⤊ 0⤋
The earth has two motions -it spins on its axis and it moves in an orbit around the sun
The period of rotation through 360 degres (that is one complete turn of the earth) takes 23 hours,56 minutes and 4.091 seconds
It was belive that the speed of the rotation never changed,but it has been faound that there are tini variations.Because of the friction of ocean tides and changes in the Earth's crust,our day may be longer at the rate of about one thousandth of a second per century
A planet moves faster when it it closer to the sun and since the sun does not stay the same at all times,the orbital speed is constantly changing
2007-05-20 08:03:19 · answer #2 · answered by Zameer 2 · 0⤊ 0⤋
Earth rotates around 900 mph.
2007-05-19 23:21:55 · answer #3 · answered by Invisble 4 · 0⤊ 0⤋
the earth rotates at a speed of 67,000mph as it orbits the sun
2007-05-20 00:32:31 · answer #4 · answered by Dr. Eddie 6 · 0⤊ 0⤋
With respect to the sun (we can ignore the rotation of the milky way galaxy) we go in a rough circle around the sun in 365.25 days and its 93,000,000 miles radius (distance to the sun) So the circumference (our orbital path) is 2(pi)r or
2 * 3.141*93 million/365.25 days =
Around 66,660 miles per hour.... We're Hauling A5S!!
2007-05-19 23:23:33 · answer #5 · answered by eggman 7 · 1⤊ 0⤋
Average Orbital Speed: 29.783 km/s
Min Orbital Speed: 30.287 km/s
Max Orbital Speed: 29.291 km/s
2007-05-19 23:08:19 · answer #6 · answered by Mr. Smith 5 · 0⤊ 0⤋