How many kilometres is 1 Astronomical Unit?

Answer 1

An Astronomical unit is the standard distance between the earth and the sun.

It is about 149,597,870.691 kilometers (92,955,807.267 miles).

It is defined as the distance that an object would have a perfectly circular orbit of exactly 365.2568983 days (31,558,196.01312 seconds).

One light-year is ~63,241 AU, and one parsec is ~206,265 AU.

Answer 2

1 AU = 149,597,870.691 kilometers An Astronomical Unit is approximately the mean distance between the Earth and the Sun. It is a derived constant and used to indicate distances within the solar system. Its formal definition is the radius of an unperturbed circular orbit a massless body would revolve about the sun in 2*(pi)/k days (i.e., 365.2568983.... days), where k is defined as the Gaussian constant exactly equal to 0.01720209895. Since an AU is based on radius of a circular orbit, one AU is actually slightly less than the average distance between the Earth and the Sun (approximately 150 million km or 93 million miles).

Answer 3

An astronomical unit is the mean distance between the Earth and the Sun. An astronomical unit is about 93 million miles or 149,598,000 kilometers. Astronomical units are abbreviated with AU or a.u.

Answer 4

One Astronomical Unit is the mean distance between the Sun and the Earth. The Earth's orbit is an ellipse, so sometimes Earth is less than 1 AU from the Sun, and sometimes it is a bit farther out.

The precise value of the AU is currently accepted as 149,597,870,000 meters, which is 93 million miles approximately.

So 8 AU is eight times that far. Google has a really neat calculator and conversion feature, so I typed "8 Astronomical Units in miles" into the Google search box and got this answer:

8 Astronomical Units = 743,647,101 miles

Pretty neat, huh?!?!

Answer 5

One AU is the distance from the Sun to the Earth, which is almost exactly 500 light-seconds.

One light year is the distance than light travels in a year.

So figure out the number of seconds in a year, which is 60 * 60 * 24 * 365.26, and then divide by 500 to get the number of AU in one light year.

Or, Google can do the calculation for you. Type in "1 light year in AU", and Search; you get

1 light year = 63 239.6717 Astronomical Units

Answer 6

It's defined as the average distance between the earth and sun,

which is roughly 93 million miles.

Answer 7

1 Astronomical Unit = 149,598,000 kilometers

Answer 8

1 Astronomical Unit = 149,598,000 kilometers

Answer 9

An astronomical unit is the distance from Earth to Sun, about 150,000,000 million km.

Answer 10

It's defined as the average distance between the earth and sun, roughly 93 million miles.