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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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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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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Looking for a sky event this week? Check out our full Sky This Week column.  July 23: Mercury’s retrograde path ends The Moon passes 0.6° south of Antares, the heart of Scorpius the Scorpion, at 6 P.M. EDT. This evening, the two remain nestled close, a lovely sight in the southern sky after sunset.  About 90 minutesContinue reading "The Sky Today on Friday, July 24: The Moon passes Antares"

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Friday, July 24The Moon passes 0.6° south of the bright red star Antares in Scorpius at 6 P.M. EDT. This evening, the two remain nestled close, a lovely sight in the southern sky after sunset. You’ll find the pair in the south early this evening, slowly arcing down toward the west throughout the evening. AtContinue reading "The Sky This Week from July 24 to 31: The Southern Delta Aquariids peak"

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Looking for a sky event this week? Check out our full Sky This Week column.  July 22: Dione passes north of Saturn The planet Mercury is stationary at 1 P.M. EDT. Located in the constellation Gemini, the tiny world is now rising before the Sun, visible for a short time in the east before sunrise. However, it’sContinue reading "The Sky Today on Thursday, July 23: Mercury’s retrograde path ends"

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Looking for a sky event this week? Check out our full Sky This Week column.  July 15: The Summer Triangle overhead The nearly three-day-old Moon passes 0.5° south of Regulus, the heart of Leo the Lion, at 9 P.M. EDT. Just after sunset, you’ll be able to spot the delicate crescent Moon in the west, with brightContinue reading "The Sky Today on Thursday, July 16: The Moon passes the Lion’s heart"

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Looking for a sky event this week? Check out our full Sky This Week column.  July 14: Mars sits north of Aldebaran Now that summer is in full swing, let’s check in with the season’s most famous asterism: the Summer Triangle. By late evening, this celestial shape is high in the southeast, bounded by the bright starsContinue reading "The Sky Today on Wednesday, July 15: The Summer Triangle overhead"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 23: Try out the Turtle Nebula Now shining at magnitude 10.6, main-belt asteroid 21 Lutetia is sliding just south of a 9th-magnitude field star in Scorpius. The best time to observe is late in the evening in the hour or twoContinue reading "The Sky Today on Wednesday, June 24: Look for Lutetia’s light"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 22: Visit the North America Nebula Mercury passes 7° due south of Pollux in Gemini at 3 P.M. EDT. By evening, Mercury, Jupiter, and Pollux create a skinny, tall triangle with the two planets forming the base and the star atContinue reading "The Sky Today on Tuesday, June 23: Try out the Turtle Nebula"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 21: A summertime lineup If you’re up late after midnight, you’ll have the chance to check in on a summertime favorite: NGC 7000, the North America Nebula in Cygnus. Reaching nearly 70° high in the east by 2 A.M. local daylightContinue reading "The Sky Today on Monday, June 22: Visit the North America Nebula"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 20: Libra’s Ghost Cluster The summer solstice occurs at 4:25 A.M. EDT. This is the time the Sun reaches its northernmost point in the Northern Hemisphere sky, which also means our star takes its longest path across this hemisphere’s sky onContinue reading "The Sky Today on Sunday, June 21: A summertime lineup"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 19: Dione crosses due north of Saturn Highest in the south around 10:30 P.M. local daylight time is the constellation Libra, whose brightest star is Beta (β) Librae, also called Zubeneschamali. Nearly 12° below (south) of this star at that timeContinue reading "The Sky Today on Saturday, June 20: Libra’s Ghost Cluster"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 18: The Moon and the Sickle Saturn rules the early-morning sky, shining at 1st magnitude in otherwise dim Pisces the Fish. One of the ringed planet’s many moons, Dione, passes due north of Saturn the morning of June 19. The 10th-magnitudeContinue reading "The Sky Today on Friday, June 19: Dione crosses due north of Saturn"

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Friday, June 19The Moon passes 0.3°  south of Regulus at 11 A.M. EDT. By evening, our satellite has moved farther east to lie to the bright star’s upper left as they slowly set in the west after sunset.  Bright Venus is now located in central Cancer and is just 45’ north of M44, the BeehiveContinue reading "The Sky This Week from June June 19 to 26: The summer solstice"

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We’re used to a lot of different natural things falling out of the sky. These can include snow, rain, and sometimes even frogs (yes, really). All of these relate to weather phenomena. Far more exotic things fall from the sky that are not related to weather. Earth is pelted by about 14 tons of micrometeoritesContinue reading "A meteorite impact may have once rained gold on Western Australia – new study"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 17: The Moon covers Venus Now it’s Venus’ turn to close in on the Beehive Cluster (M44), which sparkles in central Cancer. Tonight after sunset, blazing Venus is just 1.3° from the center of this loose open cluster, which is visibleContinue reading "The Sky Today on Thursday, June 18: The Moon and the Sickle"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 16: The Moon meets up with Mercury and Jupiter The Moon, moving east along the ecliptic (the plane of the solar system and the line along which the planets and Moon move on the sky), passes 3° north of Jupiter inContinue reading "The Sky Today on Wednesday, June 17: The Moon covers Venus"

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Looking for a sky event this week? Check out our full Sky This Week column.  June 15: Mercury at greatest eastern elongation The Moon passes 3° north of Mercury at 4 P.M. EDT. Looking west again after sunset this evening, the Moon now sits above Mercury, forming a triangle with Mercury and Jupiter.  Half an hour afterContinue reading "The Sky Today on Tuesday, June 16: The Moon meets up with Mercury and Jupiter"

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