Would someone be kind enough to confirm the speed the earth travels through
space in it's Sun orbit - ignoring Galaxy expansion (son's science
homework).

I make it 466,017 metres per second on average.

Thanks.

M

I think its 18 miles a second (in the UK!)

Cheers, John
"

"Merlin" wrote in message
...
Would someone be kind enough to confirm the speed the earth travels
through space in it's Sun orbit - ignoring Galaxy expansion (son's science
homework).

I make it 466,017 metres per second on average.

Radius earth's orbit = 150 million kilometres
So earth travels 150 x 2 pi million kms in a year of 365 days
ie 300,000,000 pi kms in 365 x24 x60 x60 seconds
ie 300,000,000,000 pi metres in .....
....
can't be bothered any more, but I bet you are right

Jack

Would someone be kind enough to confirm the speed the earth travels
through
space in it's Sun orbit - ignoring Galaxy expansion (son's science
homework).


I make it 466,017 metres per second on average.

I'm glad it's a bit slower than that or we'd have left the sun long
ago. The true answer is 29785 m/s.

Tudor Hughes.

Merlin wrote:

Would someone be kind enough to confirm the speed the earth travels
through space in it's Sun orbit - ignoring Galaxy expansion (son's science
homework).

I make it 466,017 metres per second on average.

Thanks.

M


I make it ~29800 metres/second.

--
Brian Wakem

In article ,
Merlin writes:
Would someone be kind enough to confirm the speed the earth travels through
space in it's Sun orbit - ignoring Galaxy expansion (son's science
homework).

Ignoring the rotation of the Galaxy as well, I imagine, which would give
quite a significant speed component.

I make it 466,017 metres per second on average.

Well, if we approximate the Earth's orbit by a circle of radius 93
million miles (when it's really an ellipse), and say that it takes
approximately 365.25 days to cover 2 x pi x 93,000,000 miles, then I
reckon that you get 32589 yards per second. With all the approximations
I've made, a yard is near enough the same as a metre. So unless I've
made a mistake, I reckon that your figure is too low by a factor of
about 7 or 8. Even if it's me that's made the mistake, I reckon you'll
have done extremely well if your answer is really correct to the 6
significant figures that you quote.
--
John Hall

"The covers of this book are too far apart."
Ambrose Bierce (1842-1914)

I got 29785 m/s too. 18.5 miles per second and 66627 mph. For some reason I
thought it would be faster than this.


Jeremy

"Merlin" wrote in message
...
Would someone be kind enough to confirm the speed the earth travels
through space in it's Sun orbit - ignoring Galaxy expansion (son's science
homework).

I make it 466,017 metres per second on average.

Thanks.

M

In article ,
John Hall writes:
So unless I've
made a mistake, I reckon that your figure is too low by a factor of
about 7 or 8.

I made one mistake for sure. I misread 466,017 as 466.017. So allowing
for that, I reckon, along with most people, that your figure is too high
rather than too low.
--
John Hall

"The covers of this book are too far apart."
Ambrose Bierce (1842-1914)

Tudor Hughes wrote:
Would someone be kind enough to confirm the speed the earth travels
through
space in it's Sun orbit - ignoring Galaxy expansion (son's science
homework).


I make it 466,017 metres per second on average.

I'm glad it's a bit slower than that or we'd have left the sun long
ago. The true answer is 29785 m/s.

Tudor Hughes.


I have 29865 m/s though that's because I took the year to be an average
year of 365.25 days.

Joe
Wolverhampton

Thanks all. Recalced it to around 29,750 mps

Seems a little slow but maths is maths I guess.

Would any body care to estimate the speed of it from the perspective of a
fixed point in space? (Just for fun)

M


"Merlin" wrote in message
...
Would someone be kind enough to confirm the speed the earth travels
through space in it's Sun orbit - ignoring Galaxy expansion (son's science
homework).

I make it 466,017 metres per second on average.

Thanks.

M