Friday, August 3
Saturday, August 4
Sunday, August 5
Monday, August 6
Tuesday, August 7
Wednesday, August 8
Thursday, August 9
Friday, August 10
Saturday, August 11
The thick waning crescent Moon rises by 1 or 2 a.m. (with Jupiter above it). But its modest light, notes the International Meteor Organization, "should be considered more of a nuisance than a deterrent."
You're also likely to see occasional Perseids for many nights before and after. See the August Sky & Telescope, page 50.
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 map in the center of each issue of Sky & Telescope, the essential guide to 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 charts). The standards are the little Pocket Sky Atlas, which shows stars to magnitude 7.6; the larger and deeper Sky Atlas 2000.0 (stars to magnitude 8.5); and the even larger Uranometria 2000.0 (stars to magnitude 9.75). And read how to use sky charts effectively.
You'll also want a good deep-sky guidebook, such as Sue French's Deep-Sky Wonders collection (which includes its own charts), Sky Atlas 2000.0 Companion by Strong and Sinnott, the bigger Night Sky Observer's Guide by Kepple and Sanner, or the classic if dated Burnham's Celestial Handbook.
Can a computerized telescope replace charts? I don't think so — not for beginners, anyway, and especially not on mounts and tripods that are less than top-quality mechanically (able to point with better than 0.2° repeatability). As Terence Dickinson and Alan Dyer say in their invaluable Backyard Astronomer's Guide, "A full appreciation of the universe cannot come without developing the skills to find things in the sky and understanding how the sky works. This knowledge comes only by spending time under the stars with star maps in hand."
This Week's Planet Roundup
Mercury is still deep in the glow of sunrise.
Venus and Jupiter (magnitudes –4.5 and –2.2) shine dramatically in the east before and during dawn. They've widened to about 18° apart now; Jupiter is the higher one. Look for orange Aldebaran, much fainter, 5° lower right of Jupiter. Also in Jupiter's area are the Hyades, and above are the Pleiades.
The asteroids Ceres and Vesta, magnitudes 9.1 and 8.4, are in Jupiter's vicinity too! See article and finder charts: Ceres and Vesta, July 2012 – April 2013.
Mars and Saturn (magnitudes +1.1 and +0.8, respectively) are low in the west-southwest at dusk, forming a triangle with similarly bright (but twinklier) Spica. Saturn and Spica are 4½° apart, with Saturn on top. Mars, to Spica's right, is approaching closer to them every day. It will pass between them on August 13th and 14th.
Uranus (magnitude 5.8, at the Pisces-Cetus border) and Neptune (magnitude 7.8, in Aquarius) reach good heights in the southeast by midnight daylight-saving time. Finder charts for Uranus and Neptune.
All descriptions that relate to your horizon — including the words up, down, right, and left — are written for the world's mid-northern latitudes. Descriptions that also depend on longitude (mainly Moon positions) are for North America. Eastern Daylight Time (EDT) equals Universal Time (also known as UT, UTC, or GMT) minus 4 hours.
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