SUNSET: 
Explore the Night with Bob King
A Winter Night's Sojourn in Orion's Belt
Orion's Belt is a magnetic sight on February nights. Take the bait and revel in a bounty of double and multiple stars, nebulae, and more.
Explore the Night with Bob King
Asteroid 2018 CB Zips by Earth Friday: Watch it Online
Newly-discovered asteroid 2018 CB will be passing only about 44,000 miles away Friday and visible in modest telescopes.
Explore the Night with Bob King
Humanity Star: Bright Idea or Dark Sky Nemesis?
The launch of the Humanity Star has some fuming, others smiling, at the prospect of seeing a bright, new satellite. What do you think?
Astronomy in Space with David Dickinson
Explorer 1: NASA Marks 60 Years in Space
60 year ago today, a small satellite ushered in the U.S. space program in a big way.
Explore the Night with Bob King
Make the Most of January's Total Lunar Eclipse
An unusual dawn total lunar eclipse presents special challenges and great photo opportunities. Here's what you need to know to make the most of it.
Astronomy in Space with David Dickinson
NASA Unveils New Power Source for Space Exploration
The Kilopower fission reactor will offer a more efficient and more powerful portable power source for solar system exploration.
Cosmic Relief with David Grinspoon
Cosmic Communion: A Total Solar Eclipse
Last summer's total solar eclipse provided a profound moment of celestial accord for millions of Americans.
Explore the Night with Bob King
Michigan Meteorite Tally Multiplies
They look like leftover gravel from a freshly laid asphalt road, but the black stones that spattered across the snow in the wake of the January 16th Michigan fireball were anything but terrestrial. They belonged to a tiny asteroid on a recent foray to the outer asteroid belt but now…
Explore the Night with Bob King
Mira Makes January Nights "Wonderful"
Mira, one of the easiest-to-observe pulsating variable stars, reaches peak brightness this month. Don't be shy, come look her in the eye.
Imaging Foundations with Richard Wright
Framing Your Astro Images: Understanding Field of View and Pixel Scale
Knowing your astrophotography setup's pixel scale will help you take better pictures. And to determine pixel scale, you first need to know your field of view.
Explore the Night with Bob King
Catch these Comets in 2018
We look ahead to see what fuzzy visitors, new and returning, will brighten the nights ahead. One and possibly two naked-eye comets are on the way.
Explore the Night with Bob King
Mars Flies By Jupiter in a Close Dawn Conjunction
The new year opens with the magnificent pairing of the solar system's largest planet with one of its smallest.
Astronomy in Space with David Dickinson
Looking Ahead: Space Missions for 2018
The next year will see space missions headed for Mars, Mercury, the Sun, and more. Asteroid rendezvous, exoplanet discoveries, and a Mars landing await.
Astronomy in Space with David Dickinson
Two Finalists for NASA's New Frontiers
NASA has selected two finalists for consideration as the next New Frontiers mission: a comet sample return and a flying drone for Titan.
Explore the Night with Bob King
Meet the Shy Side of the Local Group
The Local Group galaxies and their kin are the building blocks of the most magnificent galaxies in the universe. Let them inspire your winter nights.
Explore the Night with Bob King
What's the Thinnest Crescent Moon You Can See?
A slender Moon is an beautiful and inspiring sight. December and January offer several opportunities to see these exceptional crescents.
Explore the Night with Bob King
Fantastic Year for Geminid Meteor Shower
Mark the date: December 13th. That's the night the Geminid meteor shower peaks. Highlighted by the return of its parent asteroid 3200 Phaethon, this year's show promises to be one of the best ever.
Imaging Foundations with Richard Wright
Seeing vs. Transparency: What's the Difference?
Good weather for imaging is about more than just the clouds! Even if it's cloud-free, you'll need to understand if the seeing and transparency are good.
The Black Hole Files with Camille Carlisle
Most Distant Black Hole Yet
Astronomers have discovered a supermassive black hole scarfing down gas just 690 million years after the Big Bang.
Astronomy in Space with David Dickinson
Voyager 1 Fires Dormant Thrusters
NASA engineers directed the historic spacecraft Voyager 1 to fire its backup thrusters for the first time in 37 years.
