301–320 of 444 results

Double Stars

Pushing Limits: A Spring Sky Double Star Romp

Push your telescope to the limit and put your eyes to the test with this series of tight-knit springtime double stars.

Explore the Night with Bob King

Three Crescents and a Sinking Comet

If you're crazy about crescents, you'll find your happy place this week between the Moon and Venus. Meanwhile, we shift our focus from 45P/H-M-P to another famous periodic comet, 2P/Encke.

Deep Sky Prizes

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Hidden Gems in Common Deep-Sky Objects

Many of the deep-sky objects we point our telescopes toward have pleasant surprises, some in plain sight, others hidden and more challenging. Let me introduce you to a few.

Explore the Night with Bob King

Comet 45P Returns to Dark Skies

With the Moon out of the picture, amateurs can once again check in on comet 45P/H-M-P, now making an appearance in the evening sky.

Comet 45P

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Green Comet 45P Makes Close Earth Flyby

Green-glowing 45P/Honda-Mrkos-Pajdusakova will make an unusually close pass by Earth on Saturday. Watch it boogie across the morning sky this week!

Fantastic Voyage

Explore the Night with Bob King

Star-Trapping in Orion's Trapezium

Take a high-power ride to seek out baby stars and clotted clouds within the heart of the Orion Nebula.

Space Satellites

Get Your Iridium Fix Before It's Too Late!

The shock and dazzle of Iridium flares will soon be a thing of the past. Here's how to make the most of seeing them before they're replaced by a new generation of satellites.

Near and Far Planets Draw Close

Explore the Night with Bob King

See Mercury First, Then Have Breakfast

Late sunrises make it easy to follow the parade of planets at dawn, including a nice apparition of Mercury this week with three successive lunar conjunctions.

Explore the Night with Bob King

Explore Craters in the Lunar Arctic

Put on a coat, set up your scope, and become a polar explorer as we visit off-the-beaten-path craters and maria in the Moon's arctic vastness.

Finder Chart Comet 45P/


Bright Prospects for Comets in 2017

Comet lovers have much to look forward to in the new year with six potential bright binocular comets and at least two others for modest backyard telescopes.

New Year's Revelers Passing in the Night

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Mars Meets Neptune on New Year's Eve

Doing anything on New Year's Eve? Before you start toasting, don't miss an exceptionally close conjunction of Mars and Neptune.

Low Sun, Long Shadows and Icy Atmospherics

Explore the Night with Bob King

Swing Low, Sweet Sun: It's Solstice Time

Daylight ebbs to a minimum on Wednesday's winter solstice, but not for long. The very next day, the Sun turns back north and the cycle of light begins again.

Beguiling Hues

Explore the Night with Bob King

Colored Double Stars, Real and Imagined

Colorful lights twinkle everywhere during the holiday season, including up above in some remarkably tinted double stars. Find out what makes them so alluring.

Celestial News & Events

Supermoon and Geminids Duke it Out

In a spectacular case of bad timing, the full Moon coincides with the annual Geminid meteor shower. Don't feel put out. There's still something for everyone, including a consolation prize.

Comet Triple Crown

Pro-Am Collaboration

Comet Campaign Seeks Imagers Worldwide

Calling all imagers! Three comets will make close flybys of Earth over the next two years. Join a new pro-am effort to make the most of this rare triple play.

Quasar Footprint

Explore the Night with Bob King

Quasar CTA 102: Historically Bright, Violently Variable

The normally faint quasar CTA 102, once thought to harbor an advanced civilization and made famous in a 1967 song by the Byrds, is currently bright enough to see in an 8-inch telescope.  In the history of SETI, the Search for Extraterrestrial Intelligence, there have been two great false alarms.…

Brothers in Blue

Explore the Night with Bob King

Uranus: In Seventh Heaven with Planet Seven

With our eyes often glued to the bright classical planets, Uranus is easy to overlook. Now well-placed for viewing at a convenient hour, why not pay this pale blue dot a visit the next clear night?

Supermoon a Supersight

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Behold November's Super-Duper Supermoon

You won't want to miss the biggest, brightest full Moon in more than 68 years. Find out what makes this supermoon so special and how best to view it.

Beacons in Interstellar Fog

Explore the Night with Bob King

The Merope Nebula and Its Well-Kept Secret

Did you know that the brightest part of the Merope Nebula in the Pleiades is also the hardest to see? We'll make sense of this seeming contradiction while honing key observing skills.