SUNSET: 
Was Early Mars "Wet and Warm"? Or Wet and Cold?
A new model suggests that Martian valley networks might have been created by ancient subglacial rivers rather than water flowing on the surface.
Astronomy in Space with David Dickinson
NASA Launches Perseverance Rover for Mars
NASA’s Perseverance rover heads to the Red Planet.
China Launches Tianwen 1 Mars Mission
China launches its first Marsbound mission, Tianwen 1, which carries an ambitious orbiter, lander, and rover package.
Astronomy in Space with David Dickinson
United Arab Emirates Launches Mars Hope Orbiter
United Arab Emirates joins the "planetary space club" with an ambitious mission to Mars.
Weak Martian Magnetic Field May Have Let Air Out
Mars's magnetic field weakened and disappeared billions of years ago. Now, scientists have found that the weak field might have been worse than none at all.
The Martian Methane Mystery Continues
The most advanced instrument ever sent to Mars to study its atmosphere has failed to find any methane after months of searching.
Curiosity Sees Phobos Transit . . . After Sunset
NASA's Curiosity rover just spied transits of both Martian moons across the face of the Sun — including one that happened after the Sun had set.
New Study Confirms Methane on Mars – But It’s Not Definitive
Independent methane detections in the Martian atmosphere by the Curiosity rover and Mars Express orbiter add confusion to a convoluted story.
Curiosity Rover Exposes Mountain’s Origin
Scientists have used an innovative measure of Mars's gravity to reveal the origin of the mountain the rover is exploring.
Dust Storm Electricity Might Forge Perchlorates on Mars
Electrostatic discharge in a simulated dusty Martian environment yields perchlorates — a potential energy source for microbial life — at abundances 1,000 times greater than sunlight alone.
60-Second Astro News: Dust Storms on Titan, Origin of Phobos
In astronomy news this week: Dust storms are seen blowing around Titan for the first time, and new clues from old data suggest that an impact on Mars gave birth to Phobos.
Observers Anxious for Dust to Settle as Mars Opposition Approaches
With opposition only weeks away, will the current global dust storm finally break? We look at the prospects.
Explore the Night with Bob King
Fireworks, Planets, Comets, a Nova — July's Got it All!
July's a busy month for skywatching. Not only are five bright planets in view, but three comets and a newly-discovered nova are also observable. And it all starts with a bang on Independence Day.
Big Dust Storm Blows up on Mars (Updated)
Will Mars soon be hidden under a veil of dust? Let's hope not. We explore the current storm and the planet's upcoming close opposition.
Martian Supervolcano Created Mysterious Rock Formation
Scientists have discovered that a supervolcano likely created a mysterious rock formation on Mars some 3 billion years ago.
Mars Dust Storm Grows — Curiosity's Skies Darkening
The dust storm on Mars that broke out at the end of May is now affecting the skies across the entire planet.
Methane and Other Organics on Mars
The Curiosity rover has detected organic molecules in ancient rocks on Mars.
Curiosity Rover is Drilling Again
An innovative technique has allowed NASA's Curiosity Rover to resume drilling Martian rocks. But the partially successful test shows that more work remains to be done.
Mud Cracks on Mars Reveal Lake's History
Curiosity spotted polygonal shapes on the surface of rocks on Mars — now, analysis of these mud cracks is revealing the history of the long-ago lake that once filled Gale Crater.
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.