Re: Planets and Stars - an idea


"Paul Colquhoun" <newsposter@xxxxxxxxxxxxxxxxxxxx> wrote in message news:slrngubfb7.8sr.newsposter@xxxxxxxxxxxxxxxxxxxxxxx
On Wed, 15 Apr 2009 09:42:46 GMT, Terence Nesbit <TerryKidd@xxxxxxx> wrote:
| I posted this on the scifi newsgroup, so maybe I will post it here since a
| few of you were discussing the rotational effect of launches.
|
|
| "Terence Nesbit" <TerryKidd@xxxxxxx> wrote in message
| news:kqBAl.93782$4m1.88719@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
|>I had a discussion on the Sci-Fi Bulletin Board a while ago concerning the
|>Earth and why it does/does not revolve around the sun. Recently I was
|>watching PBS and on came a science teacher talking about a red planet in
|>space that could be seen during March/April (or Feb/Mar) that is located 65
|>million light years away.


Have you got a reference for this? Are you sure they said it was a
planet?

Did they mention how hard it was/is to see?


|> In the prior discussion I had mentioned that the Earth does not
|> necessarily have to revolve around the sun because the Earth's tilting
|> could presumably guide the seasonal shifts. During the winter the sun can
|> be seen at a lower angle than in summer, where it is almost directly
|> overhead. This being the case, what is the utility of the Earth circling
|> the Sun?


Mainly it stops us from falling into the sun and vaporising.


|> After hearing about the red planet and star (called beetlejuice and
|> Andromeda I think, the latter I'm not sure about), why can the citizens of
|> Earth see the same planet and star, year after year, from 65 million light
|> years away? The Earth and that planet and star would have to be in the
|> same position, or a similar one, comparative to the Earth. Of course,
|> this realization can only lead to one conclusion, but here are a few:
|> a) both reach the same spot at the same time every year (rather chancy if
|> you consider that everything moves in space, and the other Planets in our
|> solar system circle the Sun at its own timetable;
|> b) Beetlejuice and the other planet/star do not move (again in
|> contradiction to everything else in space, as we know it);
|> c) Each has their own path that places them close to each other at these
|> points, but neither circles the sun. This suggests that the Earth doesn't
|> circle the sun. Of course this latter answer would suggest that the
|> planet and star may be seen from other points from Earth, or at a greater
|> distance.
|
| Let me clarify one thing.
|
| Since the Earth tilts, it should be apparent that the four seasons humans
| experience are due to that tilting, and not Earth's orbit around the sun.


Actually, it takes both the tilt and the orbiting to get seasons. The
tilt always points in the same direction, so as earth orbits the sun the
hemisphere pointing towards the sun changes from the northern to the
southern, and back.

Do you think that the direction of the tilt changes during the year?
Remember that the earth's axis of rotation always points to the North
Star. If the axis moved during the year, this would not be true.


| Let's consider a day. A day is one revolution of the Earth on its axis.
| The sun rises and the sun sets. So why is it so far fetched for the tilting
| to control the seasons, it would fit. This does not mean that the Earth
| never circles the sun, just that it isn't done in one year. A year for us
| is the beginning and completion of four seasons, or some variation thereof.


Grab a couple of spheres (like a basketball and a tennis ball), mark the
north and south poles on the smaller one, and see what happens when you
keep the tilt the same while you move the small ball around the larger
one.


--
Reverend Paul Colquhoun, ULC. http://andor.dropbear.id.au/~paulcol
Asking for technical help in newsgroups? Read this first:
http://catb.org/~esr/faqs/smart-questions.html#intro

Okay. For an example spin a top. When you look at the top spinning from the top of it, it is seemingly spinning in one spot (unless you can't get it to spin in one spot). Most times the top is moving to and fro and spinning around and around at the same time. I think this is what the Earth is doing. The Earth rotates daily, which is why we have day and night. The Earth also tilts, it moves from point a, let's say when the Sun is closest to 12:00, to point b, let's say to a 1:00 or 2:00 position during the winter. In between these points, the Spring and the Fall (both of which are known for cooler or more moderate temperatures), the Earth is either increasing or decreasing its angle in relation to the sun. On days during the fall and spring when the weather is unseasonably warm, most instances the Sun has jumped further towards 12:00, and once the weather cools again, it is again at a normal position between 12:00 and 1:00/2:00.
If the tilt were the same, the Sun would never be seen at two o'clock, but one of the best test cases in law school concerns a car accident where the sun reflected off of a windshield. This was not solely because of the time of day. On some days the Sun may be seen crossing above one building, but during a different season, it crosses over a completely different building when you stand in the same spot. This is because the Earth has tilted (which is why the Sun shines on the Southern hemisphere during winter; if the tilt never changed but the Earth moved closer to the Sun, either the temperatures would be warmer across the globe, or the Earth is at a different point, lower during the summer months and higher during the window, to allow for this discrepancy.).
I just noted the show in passing almost (it came on while I was watching a Ms. Marple show, or in between episodes). At 65 million light years, I think it is hard to see. But maybe not, since it could be clearly seen in that monthly period. I do remember the person talking about the difference because both of the objects are red in color when they are seen. One is closer than the other, the star is closer I think.

Terence

.

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