Looking for a sky event this week? Check out our full Sky This Week column.  August 10: Open cluster NGC 7243 In the evening sky, Venus is reaching dichotomy, the moment when it is exactly half-lit. You’ll find magnitude –4.4 Venus some 20° high in the west as the Sun sets. It’s so bright, it will beContinue reading "The Sky Today on Tuesday, August 11: Venus, half-lit "

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Which naked-eye star is richest in metals and what is the estimated mass of the metal contained therein? ThomasMineral, Virginia In astronomer-speak, metals refer to elements heavier than helium. The first stars that lit up the universe were very metal-poor, since hydrogen and helium were just about the only materials around after the Big Bang. TheseContinue reading "Which naked-eye star is richest in metals?"

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Looking for a sky event this week? Check out our full Sky This Week column.  August 9: The Moon and Mars This evening, the small constellation Lacerta sits just below cross-shaped Cygnus in the eastern sky after dark. The zig-zagging outline of the Lizard lies roughly 20° east (to the lower left early in the evening) ofContinue reading "The Sky Today on Monday, August 10: Open cluster NGC 7243 "

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Looking for a sky event this week? Check out our full Sky This Week column.  August 8: Sagittarius’ Little Gem The Moon passes 4° north of Mars at 2 A.M. EDT; the pair is visible together in the early-morning sky, some 30° high in the east an hour before sunrise. They straddle the border of Gemini andContinue reading "The Sky Today on Sunday, August 9: The Moon and Mars"

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Looking for a sky event this week? Check out our full Sky This Week column.  August 7: A lunar occultation of the Pleiades Let’s spend tonight with the Little Gem, a planetary nebula also cataloged as NGC 6818. It is highest in the sky around 11 P.M., when it is some 35° above the southern horizon. It’sContinue reading "The Sky Today on Saturday, August 8: Sagittarius’ Little Gem"

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In twilight, watch bold Venus and tiny Spica approach each other to meet September 1st. And check whether you'll be able to see anything of Wednesday's solar eclipse!

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On August 12, the New Moon’s shadow will fall over a portion of Earth’s surface. When that happens, the Sun will temporarily disappear from the sky in a total solar eclipse. These breathtaking events are spectacular and ethereal, as the sky falls dark during the day, leaving only the soft glow of our star’s outerContinue reading "How to see the August 12 total solar eclipse"

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Looking for a sky event this week? Check out our full Sky This Week column.  August 6: Mercury moves south of Pollux The Moon passes 5° north of Uranus in Taurus at 1 P.M. EDT. The pair is visible earlier in the morning, with the Moon rising shortly before midnight on the 6th along with the PleiadesContinue reading "The Sky Today on Friday, August 7: A lunar occultation of the Pleiades"

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Friday, August 7The Moon passes 5° north of Uranus at 1 P.M. EDT. The pair is visible in the early-morning sky, along with a lunar occultation of the Pleiades just after moonrise. Check out the August 7 entry in last week’s Sky This Week column for more details.  Late tonight, there’s a good hour ofContinue reading "The Sky This Week from August 7 to 14: A solar eclipse and shooting stars"

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With a new Moon in play, skywatchers anticipate a fine Perseid performance this year.

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Delphinus, the constellation looks just like a tiny Dolphin that's splashing its way through the sky amidst other famous summer sights.

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The longest total solar eclipse visible from land until 2114 will sweep across Spain and North Africa on August 2, 2027. Here’s how to choose where to watch it.

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Looking for a sky event this week? Check out our full Sky This Week column.  August 1: Open cluster NGC 6709 Mercury reaches its greatest western elongation at 4 A.M. EDT, standing 19° from the Sun. The tiny planet reaches an altitude of almost 5° above the eastern horizon an hour before sunrise, glowing at magnitude 0.2.Continue reading "The Sky Today on Sunday, August 2: Mercury at greatest western elongation"

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Looking for a sky event this week? Check out our full Sky This Week column.  July 31: Mercury brightening With the Moon rising later each night as it wanes, there’s a slightly longer dark window tonight for deep-sky observing. Let’s use it to track down NGC 6709, a lovely open cluster in the constellation Aquila the Eagle. Continue reading "The Sky Today on Saturday, August 1: Open cluster NGC 6709"

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This month we’ve got three big celestial events to cover: eclipses of the Sun and Moon, and especially good prospects for the Perseid meteor shower. Plus we’ll track down a few planets, and gaze at the center of our galaxy. So load up on the bug juice, and come along on this month’s Sky Tour.

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A partial lunar eclipse is visible across the U.S. this month, while a total solar eclipse occurs in Europe. Venus dominates after sunset, reaching 50% illumination. Most planetary activity is after midnight, as Saturn and Neptune rise in Pisces. The predawn hours reveal a fine conjunction between Jupiter and Mercury. And Mars crosses into Gemini,Continue reading "August 2026: What’s in the sky this month? Solar and lunar eclipses, plus the Perseid meteors"

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Although the early evening sky boasts only one naked-eye planet, quality more than makes up for the lack of quantity. Venus attains a splendid peak when it reaches greatest elongation Aug. 15. It then lies 46° east of the Sun and stands 30° high in the west an hour after sundown. The planet shines brilliantlyContinue reading "August 2026: What’s in the Southern Hemisphere sky this month?"

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Once the bright Moon is out of the evening sky by Monday or so, use Altair high in the southeast to find little Delphinus and Sagitta roughly a fist at arm's length from it.

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The only total solar eclipse of the year coincides with the Perseid meteor shower. Here's what you need to know to watch the eclipse.

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Looking for a sky event this week? Check out our full Sky This Week column.  July 24: The Moon passes Antares Rising in the east around 10:30 P.M. local daylight time is the Great Square of Pegasus, made up of four stars: Algenib, Markab, Scheat, and Alpheratz. But of these four, only the first three on theContinue reading "The Sky Today on Saturday, July 25: Great Square rising"

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