SUNSET: 
Cosmic Relief with David Grinspoon
Looking Back at Earth in Wonder
Seeing Earth as a dot helps prepare us for the exoplanets.
Cosmic Relief with David Grinspoon
So Many Worlds, But Is Anybody Home?
Kepler’s findings of Earth-like worlds furthers the motivation for SETI.
Cosmic Relief with David Grinspoon
Search for Intelligent Worlds
To find extraterrestrial intelligence we should look for engineered exoplanets.
Cosmic Relief with David Grinspoon
It’s Not About Pluto: Exoplanets Are Planets Too!
Recent discoveries have exposed the absurdity of the IAU’s planet definition.
Cosmic Relief with David Grinspoon
Cosmic Optimism
Our galaxy is likely to contain an increasingly large number of advanced civilizations.
Cosmic Relief with David Grinspoon
One Galactic Year from Now
Will the Anthropocene be an event, an era, or a transition?
Cosmic Relief with David Grinspoon
Life on Saturn’s Moons?
Two worlds will allow us to test contrasting views of planetary habitability
Cosmic Relief with David Grinspoon
It All Started with Mariner 2
Fifty years ago this August, with the launch of Mariner 2 toward Venus, something profoundly new appeared around the Sun.
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.
Choosing Your Astronomy Equipment
SkyScanner 100 vs. 4.5-inch StarBlast
How does the little $100 scope stack up against its venerable bigger brother?
Telescopes: Guides & Recommendations
The Joy of Small Instruments
No photograph can compare with the experience of viewing Saturn directly — something that's possible with even the smallest telescopes.
