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

Voyager Wide-Angle Views of Jupiter

Last month marked the 40th anniversary of the historic Voyager 1 encounter with Jupiter in 1979.

Why are there no stars in most space images?

Look up at space at night from a dark location and you can see innumerable stars. Why, then, do photos of so many things in space show black space, devoid of stars?

Looking at Io's Volcanoes Since Galileo

It’s been almost 17 years since NASA's Galileo spacecraft took meaningful data of Jupiter’s volcanic moon.

Moon Monday: Galileo's Galileans

This week it seems fitting to feature a portrait of the Galilean moons by Galileo.

#LPSC2018: Groovy Galilean satellites

The Jovian system is a busy place. The Groovy Galilean Satellites session at last week's Lunar and Planetary Science Conference (LPSC) covered analysis of past mission data, testable hypotheses for future missions, and discussion of the use of ground-based data.

#MoonMon: Io's pretty plumes

On this Moon Monday, I'm featuring an animation processed by Gordan Ugarkovic, showing Jupiter's volcanic moon Io with its prominent plumes.

Brief note from #AGU17: Juno observes volcanism on Io

At the American Geophysical Union meeting, members of the Juno team showed observations of active volcanism on Jupiter's moon Io.

Explore spinnable Saturn and Jupiter moons with Google Maps

Google Maps released several new map products that allow you to see the locations of named features on many solar system planets and non-planets, spinning them around in space with your mouse.

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.

Juno's instruments return riches from first perijove

On August 27, Juno soared across Jupiter's cloud tops from pole to pole, with all instruments operating. NASA posted some terrific first results from several of the instruments today. And the JunoCam team released all 28 raw images taken during the close encounter.

Will Juno’s Instruments Observe the Moons of Jupiter?

It is not easy to observe Jupiter’s moons as more than points of light with Juno, because Juno will never get very close to any of the moons, but as its orbit shifts there will be opportunities to collect data on some of the moons.

Juno has arrived!

For a second time, NASA has placed a spacecraft into orbit at Jupiter. The spacecraft operated exactly according to plan, and Juno successfully entered orbit today, July 5, 2016, UTC

A peek at the JunoCam approach movie

We're now just about 12 hours away from Juno's Jupiter orbit insertion. As anticipation ramps up, NASA has released this sneak peek at JunoCam's approach movie, made of views of Jupiter and its largest moons shot during the final approach, up until about five days ago.

A moon with atmosphere

What is the solar system moon with the densest atmosphere? Most space fans know that the answer is Titan. A few of you might know that Triton's is the next densest. But what's the third? Fourth? Do any other moons even have atmospheres? In fact, they do; and one such atmosphere has just been discovered.

Four Ideas to Bust the Floor on Outer Planet Mission Costs

The road to lower costs outer planet missions has been paved by NASA’s first two New Frontiers missions, the $700M New Horizons mission to Pluto and the $1.1B Juno mission to Jupiter. But can the cost of a mission to the outer solar system be cut to $450M, the limit for a Discovery mission?

Three Major Volcanic Eruptions Observed On Io in the Span of Two Weeks

Jason Perry brings us a report on recent ground-based observations that shed new light on the most powerful of Io’s volcanic eruptions.

Through a Glass, Darkly

When sent from deep space, even imperfect images can inform and amaze.

Europa New Frontiers Mission? (Or why I like the Europa Clipper concept even more now)

Europa remains a top priority for a future mission to explore whether it could host life. While the Europa Clipper mission, remains the current front runner, a senior NASA manager has suggested that the agency may look at still lower cost options. Van Kane looks at what those options might be.

NASA’s New Planetary Mission Woes

NASA’s planetary science program depends on regular missions to solar system bodies to gather data. A combination of budget cuts and previous commitments to develop missions currently in the pipeline means that development of follow on missions may slow to a crawl. Van Kane looks at the current situation and NASA’s plans and then look at options the agency may consider if budgets remain tight into the next decade.

Jupiter and Io from Pioneer 10

This is a parting shot of Jupiter and Io, taken December 5, 1973, by the Pioneer 10 spacecraft, the first to see either world as a crescent.

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