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.
SkyScanner 100 vs. 4.5-inch StarBlast
How does the little $100 scope stack up against its venerable bigger brother?
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.
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?
Guest Blog: In Defence of GPS
A reader expounds the virtues of electronic navigation — for automobiles and telescopes.
Has Your Observing Site Gotten Brighter?
Measurements with a Sky Quality Meter indicate that none of the author's observing sites has gotten significantly brighter over the last 5 years.
Tunnel Vision Navigation
The key to maintaining your integrity and sanity in the computer age is to make sure that electronics are your servant, not your master.
A Road Map to the North America Nebula
Hanging high overhead on autmun evenings, the North America Nebula is the season's best — assuming that you have dark skies to enjoy it and a good roadmap to help you interpret it.
Blinded by the Light
Flashlights create a little bubble of excellent visibility, at the cost of hiding the wider world.
Backcountry Stargazing Again
It's hard to find a legal wilderness campsite in the U.S. Northeast that has a decent view of the night sky. But when you do, it's well worth the effort.
