reply to post by Soylent Green Is People
Well, since this thread is still up....maybe SGIP will know this answer.
Why, on Mars, is there a "234East" longitude???
There is a prime meridian on Earth, of course....as well as on Mars. Earth has 360 degrees, from the prime Meridian...(hint, the PM runs straight
through Greenwich, England) That's where we get GMT (Greenwich Mean Time.....that's the old term, though....it is now called UTC....Universal
Coordinated Time.] Yes, I know, the letters don't match....because it's actually French, the "UTC" acronymn.....look it up, if you don't believe
On Earth, we count 360 degrees in the full circle, from the PM....but is is broken down into 180 degrees East, and 180 degrees West Longitude.
At the Equator, every second of longitude is defined as one nautical mile....6080 feet. The 'knot' was originally defined differently, as a rope
with knots tied in it, was let overboard, to guage the speed of the ship....but that was centuries ago.....we are much more precise today.
Back to Mars....about one-half the diameter of the Earth, so these measurements, at the Martian equator, won't jive with Earths, of course.
We will learn to adapt, just as we adjust from American to Metric measuring systems....
As to Mars.....why is the nomenclature so different, as pertains to longitude? Can anyone explain??
Earth has a Prime Meridian....0 degrees. We measure East and West from there, until we hit the antipode, the 180 degree Meridian.
Why are the co-ordinates on Mars different?? The Phoenix Lander is at, according to websites....68 degrees North. I understand that!! But, then it
says, it's at Longitude 234 East. There is no similar point, on the Earth's surface, to corespond to "234 East".
Why does mars have a different co-ordinate system than Earth???
I've tried to look it up, but can't find an answer. Does someone on ATS know????