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Stories, updates, insights, and original analysis from The Planetary Society.

Voyager 40th anniversary: The transformation of the solar system

The Voyager missions transformed most of the large worlds of the solar system from points of light into places to be explored.

How we would explore Uranus or Neptune

One fact dominates the planning for any mission to Uranus or Neptune: They lie far from the sun. A newly released NASA report looks at how we can explore these icy giants.

Revisiting the ice giants: NASA study considers Uranus and Neptune missions

Only one spacecraft has ever visited Uranus and Neptune: Voyager 2, in the late 1980s. A new NASA report explores the reasons to go back, and what type of mission might take us there.

Some beautiful new (old) views of Neptune and Triton

Beautiful new amateur work with 27-year-old Voyager data.

Checking in on Uranus and Neptune, September 2015 edition

There are no spacecraft at Uranus or Neptune, and there haven't been for 30 and 25 years, respectively. So we depend on Earth-based astronomers to monitor them, including Damian Peach.

First look at New Horizons' Pluto and Charon images: "baffling in a very interesting and wonderful way"

Today's press briefing at the Applied Physics Laboratory in California was preceded by hours of New Horizons team members cryptically dropping hints on Twitter at astonishing details in the seven images downlinked since the flyby. The images are, in fact, astonishing, as well as beautiful, surprising, and puzzling.

Two Months from Pluto!

Two months. Eight and half weeks. 58 days. It's a concept almost too difficult to grasp: we are on Pluto's doorstep.

New Horizons: Updates From the April 2014 Science Team Meeting

New Horizons team member Simon Porter reports on the state of the mission and Pluto system science from the recent science team meeting at the Applied Physics Laboratory.

Europe Will Select Its Next Major Science Mission in November

The European Space Agency will announce two major science missions this November, one of which is likely to be devoted to solar system exploration.

Scale comparisons of the solar system's major moons

A few presentation slides with pretty pictures, sized to scale, of the large moons of the solar system.

Pretty picture: Neptune and Triton

On a lonely evening, what is one to do but to dip into archival space image data and surface with a gorgeous photo of a crescent Neptune and Triton?

A Distant View of Triton

Ted Stryk reminisces on how he was turned on to astronomy.

Scale solar system presentation slide, a provisional version for you to review

I'm preparing a talk for the Pacific Astronomy and Telescope Show here in Pasadena on Sunday afternoon at 1:45. I have spent the morning putting together a slide that I have long wanted to have for presentations.

New Horizons Day 2: Tectonic features on icy worlds

The second day of the New Horizons Workshop on Icy Surface Processes was about geology and geophysics. This long post just covers the first talk of that day.

New Horizons workshop, day 1: Chemistry & climate on Pluto & other cold places

Today and tomorrow I'm attending the New Horizons Workshop on Icy Surface Processes. The first day was all about the composition of the surface and atmosphere of Pluto, Charon, Triton, and other distant places.

Mercury: a moon-scale body

As I wait for the MESSENGER Mercury Orbit Insertion webcast to start, I thought I'd fiddle with some images to point out that Mercury is a bridge between the scales of planets and the scales of moons.

Door 8 in the 2010 advent calendar

Time to open the eighth door in the advent calendar. Where in the solar system is this nearly flat plain?

Neptune from two slightly different perspectives

Coincidentally, two new images of Neptune were posted today, from two very different sources.

Hubble turns 20

Tomorrow is the 20th anniversary of the launch of the Hubble Space Telescope. It's hard to believe it's been going strong for so many years.

Report #2 from the New Horizons Science Team Meeting

The second report by Ted Stryk from the New Horizons science team meeting, focusing on the search for Kuiper belt object (KBO) targets.

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