Roger;
You seem to be saying there are /two/ due easts.
How can that be right? Shouldn't there only be one due east?
brent
On 9/15/2015 9:42 AM, Roger W. Sinnott wrote:
Brent,
The “small circle” route is the one that takes you on a curved path,
always toward due east.
You could also start out going due east on a “great circle” route, and
in that case, as you note, the path would gradually veer southward.
Both of these routes start out perpendicularly from the north-south line.
Roger
*From:*sundial [mailto:sundial-boun...@uni-koeln.de] *On Behalf Of
*David Patte ?
*Sent:* Tuesday, September 15, 2015 12:34 PM
*To:* sundial@uni-koeln.de
*Subject:* Re: due east
They are east-west lines, but they are not straight. They are circles.
On 2015-09-15 12:30, Brent wrote:
If I was in halifax at sunrise on the equinox and the earth
stopped rotating and I walked due east (towards the sun) across
the ocean
I would end up in Southern Spain and not on my same latitude which
is in Southern France.
So I conclude that latitude lines are not east-west lines.
Correct?
thanks;
brent
On 9/15/2015 9:01 AM, Frank Evans wrote:
Hi Brent and all,
Compass directions that are pursued make spiral curves towards
the poles, if north of east-west then towards the north pole,
if south of east-west then towards the south pole. If east or
west then they do neither but continue east-west. Try Googling
"loxodromic curve". It's what you draw on a chart. Sailors
call it a "rhumb line".
Frank 55N 1W
On 15/09/2015 15:10, Brent wrote:
I'm confused maybe.
I live in the northern hemishpere and anticipating the
equinox on the 23rd.
Supposedly the sun will rise due east.
So if due east is a right angle from north south and I
traveled due east I would not follow my line of latitude.
I would get further and further south of my latitude the
further I traveled.
So either the lines of latitude are not east west lines or
due east is not a straight line but curved.
I suspect lines of latitude are not east west lines?
They would work fine if the earth was not tilted, but it is.
Wouldn't it make sense to coordinate the globe so lines of
latitude (or call them something else) are straight and a
right angle
from north south?
brent
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