Home / Space force / This Week’s Sky at a Glance, January 18 – 26 – Sky & Telescope

This Week’s Sky at a Glance, January 18 – 26 – Sky & Telescope

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Venus, Jupiter, Antares at dawn, Jan. 19, 2018

Within the glow of early daybreak, Venus is getting set to go Jupiter whereas fainter Antares watches from the facet.

Venus, Jupiter, Antares at dawn, Jan. 26, 2019

Every week later they’re widening once more, and their positioning is sort of totally different.

Friday, January 18

• Zero-magnitude Capella on excessive, and equally shiny Rigel in Orion’s foot, have virtually the identical proper ascension. This implies they cross your sky’s meridian at virtually precisely the identical time: round 9 or 10 p.m. now, relying on how far east or west you reside in your time zone. So, at any time when Capella passes its very highest, Rigel all the time marks true south over your panorama, and vice versa.

And tonight, the intense Moon shines between them.

Saturday, January 19

• The Moon shines in Gemini this night, with Castor and Pollux to its left, Betelgeuse farther to its proper, and Procyon down beneath.

• After dinnertime, Sirius twinkles brightly underneath Orion within the southeast. Round eight or 9 p.m., relying in your location, Sirius shines exactly beneath fiery Betelgeuse in Orion’s shoulder. How precisely are you able to time this occasion to your location, maybe utilizing the vertical fringe of a constructing? Of the 2, Sirius leads early within the night; Betelgeuse leads later.

Sunday, January 20

• Full Moon, and complete eclipse of the Moon excessive in a darkish sky over the Americas. Partial eclipse begins at 10:34 p.m. EST, complete eclipse begins at 11:41 p.m. EST, totality ends at 12:44 a.m. EST, partial eclipse ends at 1:51 a.m. EST. The eclipsed Moon shall be in dim Most cancers, with the Beehive star cluster a couple of binocular field-of-view to its east.

The totally eclipsed Moon on Sept. 27, 2015, high in a dark sky.<br />Sean Walker / S&T

The completely eclipsed Moon on Sept. 27, 2015, excessive in a darkish sky. (Sean Walker / S&T.)

See the timetable to your time zone, and issues to observe for all through, in Bob King’s Guide to January’s Supermoon Total Lunar Eclipse or the quilt story of the January Sky & Telescope. Favor audio? Here is our particular podcast for the eclipse by that voice of Sky & Telescope, Kelly Beatty.

For many of Europe and Africa, the Moon will set round dawn on the 21st both throughout totality or throughout the last partial phases, though westernmost Europe — together with the British Isles — and northwestern Africa shall be handled to the entire present earlier than the Moon units and the Solar rises.

Cloudy the place you might be? Watch the Digital Telescope Challenge’s livestream of the eclipse.

Monday, January 21

• Venus, which has been approaching Jupiter for a lot of days, seems closest to Jupiter tomorrow morning the 22nd. They will be about 2½° aside in early daybreak. And search for fainter Antares eight° to Jupiter’s proper.

Suppose picture alternative! Connect your digital camera or telephone to a tripod, transfer round to border the planet pair with some foreground surroundings, and zoom in. Do it earlier than daybreak will get too shiny!

Tuesday, January 22

• That is the time of yr when the Northern Cross vegetation itself upright on the northwest horizon simply after darkish. Its prime star is 1st-magnitude Deneb.

Wednesday, January 23

• The Gemini twins lie on their sides on winter evenings, left of Orion. Their head stars, Castor and Pollux, are farthest from Orion, one over the opposite. (Castor is on prime.) The Castor determine’s toes are simply left of the highest of Orion’s dim Membership.

Thursday, January 24

• With the waning gibbous Moon now gone from the early night sky, is your sky darkish sufficient so that you can see the winter Milky Means? After dinnertime it runs vertically and throughout the zenith: from shiny Canis Main low within the southeast, up between Orion and Gemini, by means of Auriga and Perseus virtually straight overhead, and down by means of Cassiopeia, Cepheus, and Cygnus (together with the Northern Cross) to the northwest horizon.

And make the most of these darkish evenings to discover telescopic sights excessive overhead with Sue French’s Deep-Sky Wonders column, “Meridian Observing,” within the January Sky & Telescope, web page 54.

Friday, January 25

• Proper after darkish, face east and look very excessive. The intense star there may be Capella, the Goat Star. To the proper of it, by a few finger-widths at arm’s size, is a small, slim triangle of third and 4th magnitude stars often called “the Youngsters.” Although they don’t seem to be precisely eye-grabbing, they kind a never-forgotten asterism with Capella.

Saturday, January 26

• Orion is excessive within the southeast proper after darkish, and he stands highest due south round 10 p.m. Orion is the brightest of the 88 constellations, however his most important sample is surprisingly small in comparison with a few of his dimmer neighbors. The largest of those is Eridanus the Euphrates River simply to his west, huge however arduous to hint. Dimmer Fornax the Furnace, to Eridanus’s decrease proper, is nearly as massive as Orion! Even the primary sample of Lepus, the Hare cowering underneath Orion’s toes, is not a lot smaller than he’s.


Wish to change into a greater astronomer? Be taught your method across the constellations. They’re the important thing to finding every part fainter and deeper to hunt with binoculars or a telescope.

That is an outside nature passion. For an easy-to-use constellation information protecting the entire night sky, use the massive month-to-month map within the middle of every problem of Sky & Telescope, the important information to astronomy.

Jumbo Pocket Sky Atlas cover

The Pocket Sky Atlas plots 30,796 stars to magnitude 7.6, and a whole lot of telescopic galaxies, star clusters, and nebulae amongst them. Proven above is the Jumbo Edition for simpler studying within the evening. Sample chart.

When you get a telescope, to place it to good use you may want an in depth, large-scale sky atlas (set of charts). The fundamental customary is the Pocket Sky Atlas (in both the original or Jumbo Edition), which reveals stars to magnitude 7.6.

Subsequent up is the bigger and deeper Sky Atlas 2000.0, plotting stars to magnitude eight.5; practically 3 times as many. The following up, as soon as your method round, are the even bigger Interstellarum atlas (stars to magnitude 9.5) and Uranometria 2000.0 (stars to magnitude 9.75). And browse how to use sky charts with a telescope.

You will additionally desire a good deep-sky guidebook, similar to Sue French’s Deep-Sky Wonders assortment (which incorporates its personal charts), Sky Atlas 2000.0 Companion by Robust and Sinnott, or the larger Night Sky Observer’s Guide by Kepple and Sanner.

Can a computerized telescope exchange charts? Not for newcomers, I do not suppose, and never on mounts and tripods which are lower than top-quality mechanically (that means heavy and costly). And as Terence Dickinson and Alan Dyer say of their Backyard Astronomer’s Guide, “A full appreciation of the universe can’t come with out growing the abilities to search out issues within the sky and understanding how the sky works. This data comes solely by spending time underneath the celebrities with star maps in hand.”

This Week’s Planet Roundup

Jupiter on Jan. 15, 2019

Jupiter continues to be fairly low at first of daybreak, and on January 15th the atmospheric situations had been “horrible,” writes Christopher Go from the Philippines. However he was in a position to get hold of this revealing picture utilizing a 14-inch scope. South is up. Jupiter’s usually shiny white Equatorial Zone has grown a tan “Equatorial Belt” of its personal!

Mercury is hidden within the glare of the Solar.

Venus (magnitude –four.four) and Jupiter (magnitude –1.eight) rise above the east-southeast horizon practically two hours earlier than the primary mild of daybreak. They make a putting pair! By the point daybreak begins to brighten, they dominate the southeast. They’re 4½° aside on the morning of the 18th, with Venus on prime. They go one another, 2.four° aside, on the morning of the 22nd. By the 26th Venus is four° to Jupiter’s left.

They’re in southern Ophiuchus. However about eight° to the proper of Jupiter search for twinkly orange Antares, the main mild of Scorpius. At magnitude +1.zero it isn’t practically as eye-catching.

In a telescope Venus seems nearly at dichotomy: a blinding little half-moon. The disk of Jupiter seems half once more as giant, however its floor brightness is a few 50 occasions dimmer because of Jupiter’s 7-times-greater distance from the illuminating Solar.

Mars (magnitude +zero.7, in Pisces left of the Nice Sq. of Pegasus) nonetheless glows excessive within the southwest at dusk and units round 11 p.m.  In a telescope it is gibbous and pathetically small: 6½ arcseconds from pole to pole.

Saturn is hidden deep within the glow of dawn.

Uranus (magnitude 5.eight, on the Aries-Pisces border) is excessive within the south-southwest proper after darkish. It is seen in binoculars in case you have a great finder chart and if the constellations properly sufficient to see the place to start out with the chart.

Neptune (magnitude 7.9, in Aquarius) is getting low within the southwest proper after darkish. Finder charts.


All descriptions that relate to your horizon — together with the phrases up, down, proper, and left — are written for the world’s mid-northern latitudes. Descriptions that additionally rely on longitude (primarily Moon positions) are for North America.

Jap Commonplace Time (EST) is Common Time (UT or GMT) minus 5 hours.


Audio sky tour. Outdoors underneath the night sky along with your earbuds in place, hearken to Kelly Beatty’s month-to-month podcast tour of the heavens above. It is free.


“Rational and harmless leisure of the best type.”
— John Mills, 19th century Scottish producer and founding father of Mills Observatory, on novice astronomy.



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