This Week's Sky at a Glance
Some night sky sights for February 14 22
Supernova 2014J, in the galaxy M82 off the Big Dipper, is fading but still within small-telescope range at 11th magnitude. The sky becomes dark and moonless in early evening starting on February 16th or 17th. See Supernova in M83 Passes Its Peak.
Saturday, February 15
Sunday, February 16
And with a moderate to large telescope on a night of good seeing, this is when to try to detect the white-dwarf companion of Sirius, now 10.2 arcseconds east of the bright primary. See last October's Sky & Telescope, page 30, for tips and tricks when attempting this challeging project.
Tuesday, February 18
Wednesday, February 19
Friday, February 21
Saturday, February 22
Want to become a better astronomer? Learn your way around the constellations. They're the key to locating everything fainter and deeper to hunt with binoculars or a telescope.
This is an outdoor nature hobby. 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).
Pocket Sky Atlas, which shows stars to magnitude 7.6; the larger and deeper Sky Atlas 2000.0 (stars to magnitude 8.5); and once you know your way around, the even larger Uranometria 2000.0 (stars to magnitude 9.75). And read how to use sky charts with a telescope.
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 beloved if dated Burnham's Celestial Handbook.
Can a computerized telescope replace charts? Not for beginners, I don't think, and not on mounts and tripods that are less than top-quality mechanically (able to point with better than 0.2° repeatability, which means fairly heavy and expensive). 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
Venus (magnitude –4.9, in Sagittarius) blazes whitely as the "Morning Star" before and during dawn; look southeast. It's at its brightest this week. A small telescope shows that it's a thickening crescent.
Mars (magnitude –0.3, in Virgo) rises around 10 p.m. now, a fiery blaze 5° or 6° to the right of icy Spica. The two of them are highest in the south around 3 or 4 a.m., with Spica now to Mars's lower right.
In a telescope Mars has grown to about 10.5 arcseconds wide, big enough for telescopes to show some features in good seeing. Mars will be 15.1″ wide when closest to Earth in mid-April.
Jupiter (magnitude –2.6, in Gemini) dominates the high southeast in early evening. It crosses nearly overhead (for skywatchers at mid-northern latitudes) around 8 or 9 p.m. Read lots about observing Jupiter telescopically in the January Sky & Telescope, or see our briefer online article Jupiter: Big, Bright, and Beautiful.
Saturn (magnitude +0.5, in Libra) rises around midnight or 1 a.m. and is highest in the south at the beginning of dawn. By then it's far to the left of Mars and Spica, and less far upper right of Antares.
Uranus sinks low in the west after dark.
Neptune is hidden behind the glare of the Sun.
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 Standard Time (EST) is Universal Time (UT, UTC, or GMT) minus 5 hours.
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