Some daily events in the changing sky for November 30 December 8.
Comet Holmes is once again easy to spot with the unaided eye, now that the evening sky is moonless again. It continues fading gradually, but it's big. Look for it a bit above Alpha Persei. Binoculars give a beautiful view. See our recent update with finder chart, full story, and reader photos.
And don't look now, but another comet is on the way in! Comet 8P/Tuttle is still only 9th magnitude, but it should brighten to 6th magnitude from late December through mid-January. And while Comet Holmes stays stuck in Perseus for months, Comet Tuttle (being much nearer) will dive from the north celestial pole all the away across the evening sky and below the southern horizon during the same time. See the article and charts in the January Sky & Telescope, page 73.
Friday, November 30
Saturday, December 1
Sunday, December 2
Monday, December 3
Tuesday, December 4
Wednesday, December 5
Thursday, December 6
Friday, December 7
Saturday, December 8
Want to become a better amateur astronomer? Learn your way around the constellations. They're the key to locating everything fainter and deeper to hunt with binoculars or a telescope. For an easy-to-use constellation guide covering the whole evening sky, use the big monthly foldout map in each issue of Sky & Telescope, the essential magazine of astronomy. Or download our free Getting Started in Astronomy booklet (which only has bimonthly maps).
Once you get a telescope, to put it to good use you'll need a detailed, large-scale sky atlas (set of maps; the standard is Sky Atlas 2000.0) and good deep-sky guidebooks (such as Sky Atlas 2000.0 Companion by Strong and Sinnott, the even more detailed Night Sky Observer's Guide by Kepple and Sanner, or the enchanting though increasingly dated Burnham's Celestial Handbook). Read how to use them effectively.
More beginners' tips: "How to Start Right in Astronomy".
This Week's Planet Roundup
Mercury is lost in the glow of sunrise. During its recent fine morning apparition, John Boudreau of Saugus, Massachusetts, shot perhaps the best amateur imagery of Mercury we've ever seen.
Venus (magnitude 4.2, in Virgo) is the bright "Morning Star" blazing in the southeast before and during dawn. Spica, much dimmer, shines within a few degrees of it.
Mars, shining bright yellow-orange (magnitude 1.3) in Gemini, now rises as early as 6 or 7 p.m. and is high up in fine view in the east by 9 or 10. It shines very high in the early-morning hours passing near the zenith, in fact, for observers at mid-northern latitudes (around 2 a.m.).
In a telescope Mars now appears 15 arcseconds in diameter, almost as wide as the 15.9" it will display when nearest Earth on the night of December 18th. For all about observing Mars with a telescope this season, see the guide and surface-feature map in the November Sky & Telescope, page 66.
Jupiter (magnitude 1.8) is disappearing into the sunset. Can you still catch it just above the southwest horizon in bright twilight? Bring binoculars.
Saturn (magnitude +0.7) rises by about midnight and is very high in the south before dawn. Fainter Regulus (magnitude +1.4) is 8° to Saturn's upper right after they rise, and directly right of it as they fade out in dawn's glow.
Uranus (magnitude 5.8, in Aquarius) is still well placed in the south right after dark, high above Fomalhaut.
All descriptions that relate to your horizon or zenith including the words up, down, right, and left are written for the world's midnorthern latitudes. Descriptions that also depend on longitude (mainly Moon positions) are for North America. Eastern Standard Time (EST) equals Universal Time (UT, UTC, or GMT) minus 5 hours.
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