"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