Stories, updates, insights, and original analysis from The Planetary Society.
Today's the day Rosetta arrives at a comet!
In less than a day, Rosetta will officially arrive, becoming the first spacecraft ever to orbit a comet! Watch an ESA Livestream of the arrival, and check out the latest photos.
A new angle on Churyumov-Gerasimenko brings circular features into focus
It's just two days now until Rosetta arrives in its initial 100-kilometer
[UPDATED] New Rosetta images show comet's craggy shape
A shift in position has brought shadows into view from Rosetta, outlining scarps and ridges on Churyumov-Gerasimenko.
New Rosetta view of the comet - and a comparison to other comets
Rosetta's view of the comet is getting better and better. Today they released a new image from the high-resolution OSIRIS camera, and it's a very fresh one, taken only two days ago. Distinct features are coming into view. And it's finally detailed enough for me to compare it to the five other comets we've visited in the past.
Rosetta update: Long journey to a comet nearly complete
A journey of nearly a decade is almost over. Rosetta is making its final approach to comet 67P/Churyumov-Gerasimenko, and the comet's strange shape is beginning to come into focus. As of today, the spacecraft is only 2000 kilometers away from the comet, and 8 days away from arrival.
A right old comet kerfuffle…
A European space enthusiast, children's author, and volunteer astronomy outreach worker asks for more images from Rosetta.
Quick Rosetta update: Churyumov-Gerasimenko is a contact binary!
I could not wait to post these amazing new images of comet Churymov-Gerasimenko from Rosetta. The nucleus of the comet is clearly a contact binary -- two smaller (and unequally sized object) in close contact.
Rosetta’s comet is starting to take shape
A new animation of 67P/Churyumov-Gerasimenko captured by the Rosetta spacecraft shows the comet rotating.
Rosetta completes another rocket burn, spies decreasing activity on comet
Rosetta has now completed its three largest rendezvous burns as it approaches ever closer to comet 67P/Churyumov-Gerasimenko. Beginning on July 2, Rosetta will now conduct weekly burns, through August 6. Meanwhile, the cometary activity of April and May has quieted again, leaving the comet looking smaller than it did before.
Deep Impact's last images
Today I received an email notification of new public releases of some image data sets. I always love seeing new public space image data, but this notification was bittersweet: it included the first public release of the very last image data returned to Earth by Deep Impact, of a distant comet ISON.
Pretty pictures: Rosetta's comet is now acting like one!
New photos from ESA's comet-chaser show its destination comet, 67P/Churyumov-Gerasimenko, developing a coma.
Opposition time for Mars, and several months of dancing with the stars
The Mars Express team showcases some of the best viewing opportunities of Mars in 2014, including how to spot Comet Siding Spring when it flies past Mars this October.
Comet Siding Spring Mars encounter: Cosmic bully spotted by ESA and NASA
Hubble has taken some great new images of our 'friend,' Comet Siding Spring, due to pass by Mars at less than 136,000 km on October 19 – less than half the distance between Earth and our moon.
Comet spotted! Rosetta's first sight of Churymov-Gerasimenko since wakeup
Rosetta has turned on its cameras and sighted its comet for the first time since waking from hibernation. Next activity: waking the Philae lander.
Comet Siding Spring Mars encounter: Ya gotta have a little ‘tude
In the latest update on how the Mars Express flight control team is planning to deal with Comet Siding Spring is all about attitude -- and hiding behind the biggest guy in the fight.
Comet Siding Spring Mars encounter: How to determine the orbit of a comet?
In the quest to track Comet Siding Spring, the Mars Express team tells us how computing the orbit of a comet isn't as straightforward as science fiction would have us believe.
The Very Large Telescope sights Rosetta's comet target, sees activity beginning
Rosetta's comet target, 67P/Churyumov-Gerasimenko, has emerged from behind the Sun as seen from Earth, and the Very Large Telescope has photographed it. The new images show that cometary activity has already begun as Rosetta approaches for its August rendezvous.
Hypervelocity Cratering and Riding Out the Risk
Today's update from the Mars Express team contains the realisation that, for some of the risks associated with October's Siding Spring flyby, there may not be much the team can do.
Space is really, really big – except sometimes it isn’t
Here's the next installment in the continuing story of how the Mars Express team is preparing for Comet Siding Spring flyby, 19 October 2014. This week: introducing the spacecraft's subsystems and structure – and wondering how we can absorb impacts.
Comet Siding Spring Mars encounter: Why orienting Mars Express is the heart of the challenge
Today's post continues where we started last week with an update from the Mars Express Flight Control Team at ESOC on their preparations for the 19 October Comet Siding Springs flyby. Today: defining the challenge!