SUNSET: 
This Week’s Sky at a Glance, October 4 – 12
Friday, Oct. 4 • The waxing Moon this evening shines between Saturn, to its left or upper left, and Jupiter farther to the Moon's lower right (off the center-right of the chart here). Saturday, Oct. 5 • It's both International Astronomy Day and International Observe the Moon Night! The Moon…
International Observe the Moon Night 2019
Observe the first-quarter Moon on October 5 for International Observe the Moon Night. Here's a guide to tell you what to look for.
Treasure Hunting in the Hall of the Deep-Sky King
Cepheus, the King, has hidden his treasure well but not so much that curious amateurs can't find more than enough to stuff their pockets.
October 2019: Giant Planets & Bits of Comet
This month's Sky Tour let's you enjoy close pairings of the Moon with Jupiter and Saturn; explore interesting stars and constellations, and keep watch for blazing bits of Halley's Comet.
This Week’s Sky at a Glance, September 27 – October 5
The starry W of Cassiopeia stands high in the northeast after dark this week. The right-hand side of the W, the brightest, is tilted up.
This Week’s Sky at a Glance, September 20 – 28
Jupiter is the white dot shining in the south-southwest as twilight fades away. Saturn glows far to its upper left.
Will Amateurs Be Able to See the New Interstellar Comet?
Only the second object thus far to visit the solar system from interstellar space, Comet Borisov is expected to reach perihelion in December. What can we see now?
100 Days Until Christmas “Ring of Fire” Eclipse
Here’s everything you need to know about the annular solar eclipse that will cross over much of Asia on December 26, 2019.
This Week’s Sky at a Glance, September 13 – 21
The Harvest Moon is full the night of Friday, the 13th. See what other night sights await.
Another Interstellar Visitor Is Headed Our Way
An amateur astronomer has discovered a comet that might be the second interstellar visitor after 'Oumuamua — and it's heading for its closest approach to the Sun late this year.
Observe Neptune as it Comes to Opposition
Neptune, currently the Solar System's outermost planet, reached opposition on September 10th at magnitude 7.8 in Aquarius.
Meet Barnard’s Star, Our Red Dwarf Neighbor
This faint red dwarf star is famous not because it's bright but because it's fast-moving — you can actually see it moving across the sky if you track it over several years.
This Week’s Sky at a Glance, September 6 – 14
Jupiter, in Ophiuchus, is the white dot hanging in the south-southwest in late twilight, Antares, fainter, twinkles 7° to Jupiter's lower right. Saturn glows four times as far to Jupiter's upper left.
Volcanoes Turn Twilights Purple
A rash of unusually colorful sunsets follows in the wake of two major volcanic eruptions.
September 2019: Triangle Time
Download September's Sky Tour astronomy podcast for tips on observing Jupiter, Saturn, and the easy-to-spot Summer Triangle.
This Week’s Sky at a Glance, August 30 – September 7
Altair is the brightest star on the southern side of the sky after dark this week. (We're not counting the planets Jupiter and Saturn, far to its lower right.)
Be a Warrior — Tackle a Trojan Asteroid
You've seen Jupiter and its four brightest moons. Now meet the rest of the family — the Trojan asteroids.
This Week’s Sky at a Glance, August 23 – 31
Jupiter is that white dot in the south as twilight fades. After dark it moves lower toward the southwest. Orange Antares, much fainter, twinkles 7° to Jupiter's lower right.
Get to Know the Ghostly Galaxies of Sagittarius
We often think of Sagittarius as home to one galaxy only — the Milky Way. But two members of the Local Group and a smattering of fainter galaxies reside here, too.
Stargazer's Corner: Adventures Under the Night Sky
Where is the Tropic of Capricorn?
A well-traveled geophysicist recounts his curious findings at a prominent geographic benchmark in the Southern Hemisphere.
