SUNSET: 
Cosmic Relief with David Grinspoon
Mars and Our Expectations
The Red Planet has inspired a long history of brilliant mistakes.
The Incredible Skies of Namibia
Explore two unique astronomical sites that lie under the dark skies of Namibia - the HESS high-energy array and the Africa Millimeter Telescope.
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.
Astronomy in Space with David Dickinson
Akatsuki Spies Massive Wave on Venus
Japan's Venus orbiter has witnessed a huge atmospheric wave that spans the globe.
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.
Astronomy in Space with David Dickinson
NASA's Lucy & Psyche Asteroid Missions
Last week, NASA announced two new missions set to explore the earliest remnants of the solar system: asteroid 16 Psyche and Jupiter's Trojan asteroids.
Astronomy in Space with David Dickinson
Looking Ahead: Space Exploration in 2017
An exciting year lies ahead for spaceflight involving astronomy and planetary science — by NASA and by other spacefaring nations.
Explore the Night with Bob King
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.
Astrophotography with Jerry Lodriguss
Shooting Doubles
Photographing double stars is easy and can be done with most any telescope. Chances are you may already have the tools to do it today.
The Black Hole Files with Camille Carlisle
What’s Inside a Black Hole?
What’s inside a black hole? Wormholes? Alternate universes? If you fell into a black hole, only one thing’s for sure: its tidal forces would kill you.
Explore the Night with Bob King
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.
The Black Hole Files with Camille Carlisle
Black Hole Facts
Learn what a black hole is, what we mean by “singularity” and “ergosphere,” and why we think black holes are real.
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.
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.
Astronomy in Space with David Dickinson
ExoMars Trace Gas Orbiter Gets to Work
Welcome to Mars: the European Space Agency's ExoMars Trace Gas Orbiter sets up shop around the Red Planet.
Astronomy in Space with David Dickinson
Watch Resupply Mission Chase Down the International Space Station
Find out how to see a cargo mission headed to the International Space Station this weekend.
Astronomy in Space with David Dickinson
Amazing Views of Saturn's "Polar Hexagon"
NASA's Cassini spacecraft delivers stunning views from its new orbital perch.
Explore the Night with Bob King
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.
Astronomy in Space with David Dickinson
The Beginning of the End for Cassini
Cassini's final main engine burn this weekend sets up the first act of a grand finale.
Astrophotography with Jerry Lodriguss
Planning a Night of Imaging
Thinking about going out for night of astrophotography? Remember the five P’s – Proper Planning Prevents Poor Performance.
