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Latest Guest Blog Posts

Pretty Pictures of the Cosmos: Star Stream

Posted by Adam Block on 2015/07/31 10:00 CDT | 1 comment

Award-winning astrophotographer Adam Block presents the first-ever high-resolution color images of the "star stream halo" of the spiral galaxy NGC 4414.

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Our Global Volunteers: July 2015 Update

Posted by Kate Howells on 2015/07/31 09:00 CDT | 2 comments

The Planetary Society's volunteers around the world have been busy these past few months, with all the excitement surrounding Asteroid Day, the LightSail test mission, the New Horizons and Dawn missions, and other space milestones!

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Dawn Journal: Descent to HAMO

Posted by Marc Rayman on 2015/07/30 09:45 CDT | 26 comments

With a wonderfully rich bounty of pictures and other observations already secured, Dawn is now on its way to an even better vantage point around dwarf planet Ceres.

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Field Report from Mars: Sol 4060 - June 26, 2015

Posted by Larry Crumpler on 2015/07/29 01:04 CDT

Larry Crumpler gives an update on the Opportunity rover's activities in Spirit of St. Louis crater.

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Posted by Dave Doody on 2015/07/28 09:04 CDT | 1 comment

The Deep Space Climate Observatory (DSCOVR) has begun sending us fresh, whole-hemisphere images of our own fragile planet. Some sources say that the spacecraft is "orbiting" the L1 point. Dave Doody thinks this warrants some scrutiny.

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Proposals to Explore the Solar System’s Smallest Worlds

Posted by Van Kane on 2015/07/27 12:14 CDT | 10 comments

Van Kane rounds up some of the latest NASA Discovery mission proposals aiming to explore our solar system's smallest bodies.

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Help map Mars' south polar region!

Posted by Tanya Harrison on 2015/07/24 12:42 CDT | 3 comments

The science team of NASA's Mars Reconnaissance Orbiter wants your help in mapping out the weird and wonderful features of Mars' south polar region!

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Summer 2015 edition of The Planetary Report is here

Posted by Donna Stevens on 2015/07/23 10:03 CDT

The summer edition of The Planetary Report has printed and will soon be at your door.

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What in the world(s) are tholins?

Posted by Sarah Hörst on 2015/07/22 07:00 CDT | 9 comments

The question “why is Pluto red” has been answered with a word that most people have never heard of and perhaps even fewer people can actually define—“tholins”.

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Dawn at Ceres: A haze in Occator crater?

Posted by Andrew Rivkin on 2015/07/21 05:54 CDT | 17 comments

While Pluto deservedly stole the headlines last week, Chris Russell’s Dawn update at the Exploration Science Forum at NASA Ames reminded us that the other dwarf planets are also sharing their secrets with eager scientists.

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