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| Guest |
 Posted: Thu Feb 10, 2005 12:13 pm |
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I know we always draw diagrams looking down from the north pole, e.g.
so the earth spins anti clockwise. But is there a standard such that
for example, the perhelion point on the eclipse (where earth is
nearest) is on the right? or left? are there names for these
directions besides perihelion side and aphelion side? (I can see that
East and West don't work like North and South. North and South can
identify faces of the eciptic, but East and West are circular or
straight across a horizon, so they don't help to point to the perhelion
side or aphelion side of the eclipse. |
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| Sam Wormley |
| Posted: Thu Feb 10, 2005 7:12 pm |
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Guest
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jameshanley39@yahoo.co.uk wrote:
[quote:88ef93be6e]I know we always draw diagrams looking down from the north pole, e.g.
so the earth spins anti clockwise. But is there a standard such that
for example, the perhelion point on the eclipse (where earth is
nearest) is on the right? or left? are there names for these
directions besides perihelion side and aphelion side? (I can see that
East and West don't work like North and South. North and South can
identify faces of the eciptic, but East and West are circular or
straight across a horizon, so they don't help to point to the perhelion
side or aphelion side of the eclipse.
[/quote:88ef93be6e]
http://dictionary.reference.com/search?q=perihelion
http://dictionary.reference.com/search?q=aphelion |
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| Androcles |
| Posted: Thu Feb 10, 2005 9:41 pm |
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<jameshanley39@yahoo.co.uk> wrote in message
news:1108055626.052196.60550@f14g2000cwb.googlegroups.com...
[quote:1dc4400198]I know we always draw diagrams looking down from the north pole, e.g.
so the earth spins anti clockwise.
[/quote:1dc4400198]
Ha! You are no American or Canadian. An American would have said
counterclockwise. Your .co.uk email address is probably non-fictitious.
:-)
[quote:1dc4400198]But is there a standard such that
for example, the perhelion point on the eclipse (where earth is
nearest) is on the right? or left?
[/quote:1dc4400198]
Nope. Please yourself which way you draw it.
http://space.jpl.nasa.gov/
Androcles.
[quote:1dc4400198]are there names for these
directions besides perihelion side and aphelion side?
[/quote:1dc4400198]
(I can see that
[quote:1dc4400198]East and West don't work like North and South. North and South can
identify faces of the eciptic, but East and West are circular or
straight across a horizon, so they don't help to point to the
perhelion
side or aphelion side of the eclipse.
[/quote:1dc4400198] |
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| Guest |
| Posted: Fri Feb 11, 2005 10:20 am |
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Androcles wrote:
[quote:dd94efb8c8]jameshanley39@yahoo.co.uk> wrote in message
news:1108055626.052196.60550@f14g2000cwb.googlegroups.com...
I know we always draw diagrams looking down from the north pole,
e.g.
so the earth spins anti clockwise.
Ha! You are no American or Canadian. An American would have said
counterclockwise. Your .co.uk email address is probably
non-fictitious.
:-)
[/quote:dd94efb8c8]
:)
[quote:dd94efb8c8]But is there a standard such that
for example, the perhelion point on the eclipse (where earth is
nearest) is on the right? or left?
Nope. Please yourself which way you draw it.
http://space.jpl.nasa.gov/
[/quote:dd94efb8c8]
And is the sun on the major axis of the ellipse or on the line joining
the points where the summer and winter solstice occur?
Either way seems suprising. Because-Given that the earth tilts directly
towards the sun at the summer solstice.
If the sun is on the major axis, (not the solstice line), then the
earth - for it to tilt towards the sun at the summer solstice) is not
tilting along either line.
If the sun is on the solstice line, then the sun is not just
horizontally off, it is vertically off too(how off?).
thanks |
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