SUNSET: 
Explore the Night with Bob King
Volcanoes Turn Twilights Purple
A rash of unusually colorful sunsets follows in the wake of two major volcanic eruptions.
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.
Astronomy in Space with David Dickinson
Image Sleuth Spots "Churyumoon" Around Rosetta's Comet
A tiny, 4-meter fragment dubbed Churyumoon has been spotted orbiting Comet 67P Churyumov-Gerasimenko, which the Rosetta mission visited in 2014–2016.
Astronomy in Space with David Dickinson
NASA Selects Final Four Asteroid Landing Sites for Osiris-REX
The Osiris-REX spacecraft will sample one of four sites on the asteroid Bennu in July 2020.
Imaging Foundations with Richard Wright
Shooting Star Trails
Star trail images are a great and fun introduction to nightscape photography, and they're actually pretty easy to do.
Explore the Night with Bob King
Good Morning, Orion!
An August jaunt at dawn reacquaints us with the constellation Orion, the harbinger of winter.
Explore the Night with Bob King
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!
Explore the Night with Bob King
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…
Cosmic Relief with David Grinspoon
Can a Planet Think? The Gaia Hypothesis, Rethought
Humans have irrevocably changed the planet. Have those processes gone so far that Earth’s biosphere has begun to resemble a human brain?
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.
The Black Hole Files with Camille Carlisle
Galactic Center Gravity Test Confirmed
A second team of astronomers has now confirmed the light from a star passing near our galaxy’s central black hole behaved as predicted by Einstein’s theory of gravity.
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.
Astronomy in Space with David Dickinson
India Heads to the Moon With Chandrayaan 2
India enters the 21st-century race to the Moon with its Chandrayaan 2 mission.
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.
Imaging Foundations with Richard Wright
How to Modify Your DSLR for Astrophotography
Modifying my DSLR camera was the smartest thing I could have done for my astrophotography. Here's why.
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.
Astronomy in Space with David Dickinson
A Strategy to Get the Mars Insight Lander Back in the Drilling Business
Insight's robotic arm has uncovered the lander's "mole," as NASA and German aerospace engineers work to get it drilling once again.
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.
