Changes between Version 9 and Version 10 of Outreach/Observations


Ignore:
Timestamp:
01/16/09 11:05:22 (18 years ago)
Author:
jps@…
Comment:

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  • Outreach/Observations

    v9 v10  
    5858|| || ||Andromeda Galaxy (M31)|| ||Spiral galaxy (Sb)|| ||3.4 mag|| ||178'x63'|| ||>= 8"|| ||Can only see core in telescope, appears as faint, white cloud.|| ||[http://www.seds.org/Messier/m/m031.html 1] [http://en.wikipedia.org/wiki/Messier_31 2]||
    5959|| || ||Rigel (Beta Orionis)|| ||Blue supergiant and double star || ||0.1 and 6.7 mag|| ||9.4" apart || ||>=6"|| ||Rigel is one of the brightest stars in the sky and most luminous stars in the galaxy at an impressive zero magnitude with a distance of somewhere between 700 and 900 light years means it has a luminosity in excess of 40000 times that of the Sun. Its visual binary companion is much fainter and difficult to see due to the primary's brightness. With a physical separation of roughly 2000 AU, no orbital motion has been detected, but they both exhibit similar proper motions trajectories.||||[http://en.wikipedia.org/wiki/Rigel 1] [http://www.astro.uiuc.edu/~kaler/sow/rigel.html 2]||
     60|| || ||Almach (Gamma Andromedae)|| ||blue and gold double star|| ||2.3 and 5.1 mag|| ||10" apart|| ||>=binoculars|| ||Often considered the most beautiful high contrast double star in the sky, even superior to Albireo. The pair is 350 light years distant. The secondary itself is an unresolvable triple star system.|| ||[http://www.astro.uiuc.edu/~kaler/sow/almach.html 1] [http://en.wikipedia.org/wiki/Gamma_Andromedae 2]||