SUNSET: 
Cassiopeia Cornucopia — Pretty Little Clusters All in a Row
See nine unique open clusters in Cassiopeia while barely moving your telescope.
This Week's Sky at a Glance, Sept. 24 – Oct. 2
Jupiter and Saturn shine in the south-southeast at dusk, Venus low in the southwest. They're all close to the ecliptic, so a straight line from Jupiter through Saturn points almost exactly to Venus. Don't believe it? Stretch a string tightly between your hands wide apart, hold it up to the three planets, and see for yourself!
The Last Wildflowers: Globular Clusters Greet Autumn
These four globular clusters are easy to find in autumn skies and a perfect way to welcome the season.
This Week's Sky at a Glance, September 17 – 25
The waxing gibbous Moon shines with Jupiter and Saturn on its way to full. And as summer turns to fall, Deneb replaces Vega as the zenith star after dusk.
Amateurs Spot New Impact Flash at Jupiter
An amateur astronomer has discovered a possible new impact flash in Jupiter's equatorial region. Observers may yet see the dark impact scar.
This Week's Sky at a Glance, September 10 – 18
The evening Moon steps eastward over Scorpius as it waxes through first quarter. All four giant planets await your telescope in early to late evening.
Stargazer's Corner: Adventures Under the Night Sky
The Pandemic and Light Pollution
Student Kathryn Huth set out to conduct astronomical experiments when she noticed that — amidst the pandemic — she could see more stars in the sky.
This Week's Sky at a Glance, September 3 – 11
Spica glimmers demurely under showy Venus in the western twilight. Try for Mercury way down to their lower right. Jupiter and Saturn dominate the evening south.
Making Time for Morning Comets
If you like mixing comets with the quietude of observing in the small hours, September opens with five fuzzy vagabonds just waiting for a visit.
Summer Triangle Overhead
The calendar might say “September,” but now is the perfect time to explore the Summer Triangle. Find your way with this month’s Sky Tour podcast.
Meet Gamma Cassiopeiae, the Classic Eruptive Variable
Gamma Cassiopeia may lack a proper name, but the middle star of the "W"-shape constellation is worth finding on the sky.
This Week's Sky at a Glance, Aug. 27 – Sept. 4
Venus, Jupiter, and Saturn are all getting a little higher in early evening. Vega passes the zenith soon after dark; Deneb does so two hours later. Andromeda is up in the east.
This Week's Sky at a Glance, August 20 – 28
Jupiter and Saturn are just past opposition, so they dominate the sky all night. They inhabit dim Capricornus, which pushes Sagittarius westward. Venus, even showier, owns the western twilight but sets by full darkness.
The 12-Year Cycle of Jupiter Oppositions
Jupiter is at opposition on August 19th. If we take the long view — 12 years long — we can watch Jupiter's oppositions as it passes through the zodiac constellations.
Jupiter Dazzles at Its Brightest and Closest This Year
Jupiter comes to opposition on August 20th, when it will shine brighter and closer than at any other time this year. With nights starting earlier and cooler temperatures arriving, there's no better time to make the most of the planet.
This Week's Sky at a Glance, August 13 – 21
The Moon waxes from first quarter to gibbous in the evening sky, offering some of its most interesting telescopic aspects. Venus grows more insistent in the western twilight. And Jupiter and especially Saturn pose well in the southeast to south by late evening.
Fine Show Expected from the Perseid Meteor Shower
With no interference from the Moon, this year's Perseid meteor shower should be excellent. If you couldn't catch the show last night, try looking up tonight!
Learn to Star-hop in the August Sky
Learn to star-hop your way to celestial treasures in the August sky.
Recurrent Nova RS Ophiuchi Just Blew its Top!
The recurrent nova RS Ophiuchi just went into outburst — its first burst in 15 years — and it's bright enough to see with the naked eye
This Week's Sky at a Glance, August 6 – 14
It's Perseid meteor week! Venus lights the western twilight. Saturn and Jupiter are up in the southeast by mid-twilight and await your telescope later at night. And explore the deep-sky glories of Sagittarius before moonlight returns.
