SUNSET: 
Cosmic Relief with David Grinspoon
Days of Powder and Planets
A conference about exoplanet climates reveals our rapidly changing.
Cosmic Relief with David Grinspoon
My Apologies to Mercury
The innermost planet is a lot more interesting than the author realized.
Cosmic Relief with David Grinspoon
Losing Venus
By neglecting Venus, we could lose valuable knowledge about Earth.
Cosmic Relief with David Grinspoon
Planetary Changes of the Fourth Kind
Studying the terraforming of other planets can help us survive on Earth.
Cosmic Relief with David Grinspoon
Is There Art on Other Planets?
The author wonders whether other worlds produce creatures who create art.
Cosmic Relief with David Grinspoon
The State of Alien Affairs
The author reflects on the results of Denver’s recent E.T. commission election.
Cosmic Relief with David Grinspoon
All These Worlds
The Kepler spacecraft continues to reap a harvest of new planet discoveries.
Cosmic Relief with David Grinspoon
Requiem for Akatsuki
We’re fond of our spacecraft and anxious when we send them on their way. It’s hard to lose one.
Cosmic Relief with David Grinspoon
Arsenic and Old Lakes
What does the discovery of arsenic-eating microbes really tell us about finding life elsewhere?
Cosmic Relief with David Grinspoon
Weathering New Worlds
A meeting of astronomers and climate modelers will lead to better predications.
Cosmic Relief with David Grinspoon
Bring on the Exo-Earths!
Kepler’s most surprising announcement would be that it has not found any Earth-sized planets.
Cosmic Relief with David Grinspoon
Legal Aliens
Will the city of Denver establish a commission to handle diplomacy with aliens?
Cosmic Relief with David Grinspoon
Familiar Forms on Fried and Frozen Worlds
Recent discoveries on Titan and Venus show us that nature doesn’t need water to make features that remind us of home.
Cosmic Relief with David Grinspoon
The Right Stuff?
Our columnist reports on his harrowing round of astronaut training.
Cosmic Relief with David Grinspoon
Lunar News Flash
Did scientists make LCROSS seem like a dud by raising expectations of a spectacle?
Cosmic Relief with David Grinspoon
Another Giant Leap
Thanks to amateur astronomers, humanity has crossed a threshold to the age of continuous monitoring of solar system events.
Cosmic Relief with David Grinspoon
Back to the Future, This Time to Stay
The launch of LRO sets the stage for future human Moon exploration.
Cosmic Relief with David Grinspoon
My God, It’s Full of Moonlets!
A recent discovery blurs the line between amateurs and professionals.
Cosmic Relief with David Grinspoon
Monkeying with the World
For long-term survival, humans will need to be planetary engineers.
Cosmic Relief with David Grinspoon
This Is Not a Planet?
Let’s save Pluto and rescue planetary science from endless ridicule.
