This week's Carnival of Space celebrates Cassini's birthday, bringing citizen science to a Maker Fair, getting up close and personal with the new Orbital Carbon Observatory, and more. Read on for stories on new technology, citizen science, and astronomical prettiness.

Astronaut Reid Wiseman captured just how intimidating Arthur is, even from space.

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Carnival of Space is a roving collection of articles on space science. The holiday weekend shortened the news cycle, yet cool things kept happening anyway:

CosmoQuest headed to a Maker Fair, experimenting with harnessing that creativity and enthusiasm for the ongoing citizen science project to map our solar system.

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Next Big Future decided it was time to investigate the potential of the electric solar wind sail for space missions, particularly for missions that break Keplerian orbits. They also tackled NanoThor, a rotating tether launching system to fling nanosatellites out on deep space missions.

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Universe Today turns to the Rosetta mission, as the countdown begins for the spacecraft to land a probe on the comet. Meanwhile, the Mars One organization is stepping up their quest for private colonization of the red planet. Mars One started soliciting ideas for science and marketing to put together the precursor uncrewed landing probe.

Brown SpaceMan relaxes with a bit of pure astronomical eye-candy, looking at W26, the largest star in the universe, ripping itself apart.

The Meridian Journal reflects on the latest exoplanet in the neighbourhood: Gliese 832c might be a habitable planet. They also look a bit closer to home, helping Cassini celebrate a decade of exploring Saturn.

When it comes to astronomy news, this week has been all Orbital Carbon Observatory all the time on io9. After getting a backstage pass to prowl Vandenberg Airforce Base, I watched the first launch attempt get scrubbed with less than a minute before launch, then the second launch attempt succeed flawlessly. Full up with yet more information on the new satellite, I shared a list with all my favourite tidbits of trivia about OCO2.

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Get in touch if you write about astronomy or space science and you want to join the Carnival of Space! Next week's edition will be hosted by Everyday Spacer.