how do we know that distance between earth &sun is 1 astronomical unit ?

Answer 1

That's the definition of 1 AU.

Answer 2

it is same as asking how can we decide 100cm = 1 meter.
buddy its the definition. . only u can see 100 cm and not the distance between earth and sun.

To measure inter planetary distances which is so huge that if u start putting it in centimeters or meters or kilometers then perhaphs ur whole page will get filled up with just one measurement.

so for reference the distance between earth to sun is taken as 1 AU. it becomes easy to measure other distance.

Answer 3

A more difficult question would be:

How do we know:

1 Astronomical Unit = 149,598,000,000 meters

Answer 4

It relies upon on what celestial products you're speaking approximately. Distances between celestial products interior our very own photograph voltaic device are measured in miles or AU's (Astronomical gadgets). The plenty vaster distances between stars and galaxies are measured in easy years. .

Answer 5

We don't know that.
We just trust what is written in text and what we hear from others.
And since people say that 1 a.u. is defined to be the distance between ............ , we believe them to make our lives easier.

Answer 6

that's what 1 AU is -- it's our scale of defining interstellar distances, and it's a lot easier to say than so-and-so thousand million billion miles.

Answer 7

Perhaps you need to get out a tape Measure ( ;~)>

And Who are YOU too Argue about it,, Hmmmmm...

Thoughtfuls

-30-



.

Answer 8

u search the web www.astornomy.com or www.johnbratt.com he is scientist

Answer 9

because the scientist said so

Answer 10

obviously by measuring!!!