41–60 of 327 results
Crowning glory

Daylight Phenomena

Volcanoes Turn Twilights Purple

A rash of unusually colorful sunsets follows in the wake of two major volcanic eruptions. 

Trojan asteroids

Explore the Night with Bob King

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.

Explore the Night with Bob King

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.

Explore the Night with Bob King

Good Morning, Orion!

An August jaunt at dawn reacquaints us with the constellation Orion, the harbinger of winter.

Moment of impact

Celestial News & Events

Texas Amateur Detects Possible Impact on Jupiter

It looks like Jupiter got slammed again! A bright flash from a possible impact lit up the planet's South Equatorial Belt Tuesday night. 

Explore the Night with Bob King

Perseid Prospects, Mornings with Mercury and the Lunar X

With the Perseid shower, a great morning apparition of Mercury, and a chance to see craters scratch out an X on the moon, skywatchers have a busy week ahead! 

Roadmap to a stellar nursery

Deep Sky

Wallow a While in the Lagoon Nebula

We take a dip in one of summer's finest nebulae and explore everything from spooky Bok globules to the tornadic Hourglass Nebula. Don't forget your snorkel, er, telescope! Sometimes a single deep-sky object becomes your whole universe. So it was for me when I took several deep wades in the…

Fireball Over Ontario

Explore the Night with Bob King

Fireball May Have Dropped Meteorites in Ontario

A lime-green meteor as bright as the full Moon streaked across Canadian skies on July 24th and may have delivered free samples from the asteroid belt.

Multifaceted world

Explore the Night with Bob King

Lonely Pluto Is More than a Speck

With Saturn pointing the way, it's easy to venture into the Kuiper Belt this summer and pay a visit to Pluto.

Armstrong, Aldrin & Collins

Explore the Night with Bob King

Celebrate Apollo 11 with a Visit to Armstrong, Aldrin and Collins Craters

Find the craters named for the three astronauts who flew the first manned mission to land on the Moon.

Explore the Night with Bob King

A Spoonful of Saturn to Sweeten the Night

Move over Jupiter, it's time for Saturn to shine! At opposition this week, the ringed planet is at its brightest and closest for the year.

29Pgoes pop!

Explore the Night with Bob King

Where Have All the Comets Gone?

It seems like forever since a bright comet has come around. We look at current and future prospects.

Explore the Night with Bob King

How Low Can You Go? Journey to the Bottom of the Sky

How Low Can You Go? Journey to the Bottom of the Sky

Deep Sky

Welcome Back, Milky Way!

Twilight's end brings the return of the summer Milky Way to the eastern sky. We unravel the anatomy of our home galaxy by teasing out the hidden structures within that glowing band. 

Learning About the Sky

Freaky Noctilucent Clouds Break Out All Over

Night-shining clouds made of ice and meteor smoke are on the increase. We explore their origins and how to see them.

Flakey Red Spot

Explore the Night with Bob King

Jupiter Is Outstanding at Opposition

Prime-time Jupiter viewing kicks off this month when the planet reaches opposition on June 10th. 

An arm to the sun

Celestial News & Events

SpaceX Launches First Volley of Starlink Satellites

The 60 Starlink satellites parading across the sky make an incredible sight, but some skywatchers wonder at what cost to the night.

Star queen of Serpens

Deep Sky

See Bright Nebulae Millions of Light-Years Away

We leave the Milky Way behind and venture out to explore giant star-bursting regions in the galaxies M101 and NGC 2366.

Bob King Watches an ISS pass

Explore the Night with Bob King

Watch International Space Station Flybys All Night Long

The annual International Space Station marathon viewing season begins later this week, when skywatchers in the Northern Hemisphere can watch up to five successive ISS passes in one night.

Bumbling along

Moon

The Moon Bumbles Into the Beehive Friday

The thick crescent Moon occults oodles of stars in the Beehive star cluster Friday evening for much of the Americas.

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