2007-05-30 13:14:32 · 20 answers · asked by yanksfan804 1 in Science & Mathematics ➔ Astronomy & Space
Terameter = Tm = 10^12 meter
1 astronomical unit = 0.1496 Tm
Basically it is the half long axis of the earth's orbit.
Th
2007-05-30 18:38:56 · answer #1 · answered by Thermo 6 · 0⤊ 0⤋
The formal definition of the astronomical unit (AU) is: The radius of a circular orbit in which a body of negligible mass, and free of perturbations, would revolve around the Sun in 2π/k days, k being the Gaussian gravitational constant. This is slightly less than the semimajor axis of the Earth's orbit.
In meters: 1 AU = 1.49597871464 x10^11 m
For very precise work, the effects of general relativity must be included. In the Barycentric Dynamical Time system,
1 AU = 1.49597870691 x10^11 m (notice that the last 4 digits are different).
2007-05-30 14:42:16 · answer #2 · answered by morningfoxnorth 6 · 0⤊ 0⤋
The Astronomical Unit, or AU, is the distance between the Earth and the Sun, about 93 million miles.
2007-05-30 13:23:34 · answer #3 · answered by brig1gand 3 · 2⤊ 0⤋
Yes They are called (AU) astronomical units. Which is the average distance from the center of the Sun to the center of the Earth. AU = 93 million miles.
2007-05-30 17:10:11 · answer #4 · answered by Groovio 7 · 0⤊ 0⤋
GENERALLY, the Astronomical Unit (AU) is used. One AU is equal to the average distance of the earth to the sun (approx 93 million miles).
Miles, Kilometers, and (rarely) light minutes/hours are used as well - light minute is the distance traveled by light in one minute (186000 miles per second x 60 seconds) and light hours (x 60 minutes) - big numbers.
2007-05-30 14:41:51 · answer #5 · answered by Adam G 2 · 0⤊ 0⤋
Often the astronomical unit, the average distance from the earth to the sun. Kilometers are also used.
2007-05-30 13:16:35 · answer #6 · answered by Anonymous · 4⤊ 0⤋
Kilometers
Miles
Astronomical Units
Light Years
2007-05-30 15:17:27 · answer #7 · answered by zahbudar 6 · 0⤊ 0⤋
Usually in miles. The Sun is 93,000,000 miles from the Earth. One light year will place you completely out of our solar system and half way to the nearest Star - Proxima Centauri. Miles or kilometers is the practical way to measure in the solar system.
2007-05-30 13:56:20 · answer #8 · answered by Anonymous · 0⤊ 2⤋
AU which means 93 million miles
2007-06-03 05:41:09 · answer #9 · answered by Kirk Rose 3 · 0⤊ 0⤋
km, miles, or astronomical units (AU). 1 AU is the average earth-sun distance.
2007-05-30 13:16:39 · answer #10 · answered by bombaybubba 3 · 2⤊ 0⤋