Re: Nearby stars-why do they start at 4LY?


"Peter Webb" <webbfamily@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:4889c98a$0$17506$afc38c87@xxxxxxxxxxxxxxxxxxxxxxx
|
| "Androcles" <Headmaster@xxxxxxxxxxxxxxxx> wrote in message
| news:vlOgk.26498$gU4.6266@xxxxxxxxxxxxxxxx
| >
| > "John C. Polasek" <jpolasek@xxxxxxxxxx> wrote in message
| > news:5b9784dng0s0hkgu94con8409ur7kiatqg@xxxxxxxxxx
| > | Wiki et al show tables of the first 20 or 50 starsnearest the earth.
| > | The distances for the first few are
| > | .. .. .. 4.3 6.0 7.7 8.4 8.6 9.4 10.4 LY
| > | 1.7 1.7 .7 .2 1.2 1 the differences
| > | Why are there no stars from 0 to 4.3 LY? From the difference list
| > | there should be at least 2 closer than 4.3.
| > | These are probably the few that can be measured using the parallactic
| > | effect. It just doesn't seem likely that such a void exists.
| > | John Polasek
| >
| >
| > Why are you a cretin? There should be at least 55 morons
| > writing to sci.astro ahead of you and you the closest. The next
| > poster is at least an hour away from you, it just doesn't seem
| > likely that such a void exists.
| > Look, imbecile, that's the way it IS, there is no "why" to it.
| >
|
| But there is a simple "why" to it.
|
| The number of stars of stars less than x light year ways away is
| proportional to x^3, and the number between x and x+1 light years away is
| proportional to 3x^2. So the number close to the earth falls away with the
| square of the distance; its not a linear relationship; and the difference
is
| most dramatic for small distances (x =1, 2, 3).
|
| Look, imbecile, that is the way it IS, the "why" is a geometrical
argument.
|

Look, moron:
http://antwrp.gsfc.nasa.gov/apod/ap030323.html

There is just one star within one AU of the EARTH (your chosen
reference point), and four within 5 light years, namely Sol, Proxima
Centauri, Alpha Centauri A and Alpha Centauri B.
Then of course there is Barnard's star, moving rapidly.
http://www.solstation.com/stars/barnards.htm
At 8 light years you can add Sirius A and Sirius B.

How many pips in an orange and why are they not at the rind?
Because they are not homogeneous.
What "geometrical argument", ***-for-brains?



.

Loading