Sun, Sep 07, 2008

Caliente

Sky Spy

See red Mars, yellow Saturn in western sky

By Tim Hunter
special to the arizona daily star
Tucson, Arizona | Published: 06.26.2008
Try to watch the western sky a little after sunset over the next week or so to enjoy the dance of the Mars with Regulus in Leo the Lion, and take a look at Saturn, which is also in Leo.
They are getting low in the western sky after sunset and will soon be gone from our skies for a while.
Mars is slowly drifting to the east getting closer and closer to Regulus until Monday night when it passes within three-quarters of a degree of the bright star — a distance slightly greater than the width of the moon.
Mars will pass by Regulus and come between Regulus and Saturn next week. Contrast the red of Mars with the blue of Regulus and the yellowish color of Saturn.
Mars and Saturn appear brighter than Regulus, but the star is 77 light years away with 3.5 times the mass of the sun.
While you're enjoying the western sky, see if you can find Alphard before it sinks below the horizon.
It is the brightest star in Hydra the Water Snake. Also, wave goodbye to Castor and Pollux, the twins of Gemini. The last traces of our winter constellations are fading from view as the spring constellations move west, and the summer constellations become prominent in the east.
Most constellations can be seen a good part of the year if you are willing to look for them throughout the night until dawn. Specific seasonal labels are applied to constellations that are prominent in the early evening sky during the season.
Tim Hunter has been an amateur astronomer since grade school. Contact him at skyspy@azstarnet.com.