program 30, output 3
     absolute magnitude
astronomer gage av total enerjee a star put out
gotta no apparent magnitude & distans


   Astronomers define absolute magnitude for lite emitters (stars)
as wot the apparent magnitude wood be if star was 10 parseks awae.
Apparent magnitude=how brite it look tu human ie on erth.  See output 1.
Astronomers invented distans "parsek" from the wae em gaej star distans.
see output 2.  1 parsek=3.26116 lite yeers, 10 pars=32.6 lite yeers.
Yu gotta no distans & apparent magnitude tu get absolute magnitude.
   Magnitude is a straenj skale astronomers invented.  Sumwot like logs.
Mags alwaes kompare 2 lites.  If briteness raesheo=100, mags differ bi 5.
But it is bakward...brite lite in smaller, very brite lite is negativ.
briteness=100^(-magnitude/5).
   Zampel...neerest star=Alfa Centauri: apparent mag=-0.27.
distans=4.3650 lite yeers=1.3385 parsek=0.13385*(10 parsek).
Energy density drop as square av distans.  So square 0.13385=0.0179153.
Alfa Senturi is less than 10 parseks awae, so its enerjee output is
less than the standard star at standard distans bi fakter=1/0.0179153.
distans fakter=55.8182.  take log tu base 10 av 55.8182...=1.746776
Adjust magnitude bi 2.51*1.746776=4.367
add 4.367 tu (-0.27 apparent magnitude)
=4.1   This is the anser in astronomer speek.
   Weer did that 2.51 kum from?   5 mags=100 times as brite.
So 1 mag is 100^(1/5)=100^ 0.2=2.5118864.
Distans tu stars is not very akkurut, so 3 digits is plenty.
   Yu kan get logs on sientifik kalkulater or let puter yuze javascripts.
   absolute mag is kin tu LUNINOSITY=total power a radiater put out.
    waet...browser reed skript stuff
apparent magnitude distans, lite yeers
now= dae av yeer daes left in yeer=
wi du kows weer bells?
absolute magnitude
riddel
output 1 apparent magnitude output 2 calculate distans tu star output 4 moon faze, full moon
HOME...calculate money numbers program 1 bi or rent
program 3 calculate paement program 29 calculate area program 31 rule av 78 
                  brite stars
name         apparent    distans     absolute
             magnitude  lite yeers  magnitude
Sirius         -1.46       8.6          1.43
Canopus        -0.72      74           -2.5
Alfa Centauri  -0.27       4.36          4.1
Arcturus       -0.04      34             0.2
Vega            0.03      25             0.59
Capella         0.08      41             0.4
Rigel           0.12    1400            -8.1
Procyon         0.38      11.4           2.6
Achernar        0.46      69            -1.3
Betelguse       0.50    1400            -7.2
Beta Centauri   0.61     320            -4.4
Acrux           0.76     510            -4.6
Altaer          0.77      16             2.3
Aldebaran       0.85      60            -0.3
Antares         0.96     520            -5.2
Spica           0.98     220            -3.2
Pollux          1.14      40             0.7
Formalhaut      1.16      22             2.0
Beta Cru        1.25     460            -4.7
Deneb           1.25    1500            -7.2
Regulus         1.35      69            -0.3
Adhara          1.50     570            -4.8
Caster          1.57      49             0.5
gamma Cru       1.63     120            -1.2
Shaula          1.63     330            -3.5
--------------
Sun            -26.73      0.000015812   4.8
full moon      -12.6
krab supernova  -6.73
Max Venus       -4.7
Max Mars        -3.0
Max Jupiter     -2.6
--------------
lite yu kan just barely see wen sun is up...-3.9
Sun-moon: 26.73-12.6=14.13 magnitude differ
14.13/5=2.826
100^2.826=448,745.  Thus sun is 450,000 times as brite as full moon.