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Why Doesn’t Ceres Have Any REALLY Big Craters?

Ceres is the largest object in the asteroid belt, a world over 900 km in diameter. It’s so big that planetary scientists tend to refer to it as a protoplanet rather than an asteroid. The latter group consists of pulverized rubble left over from the planetary formation process billions of years ago, but Ceres is different. Show More Summary

Astrophiz Podcast 4 is Out

Astrophiz Podcast 4 is 0ut. Interview: Professor Sarah Maddison - Dust and Protoplanetary Disks History & Theory of radio astronomy: Dr Nadeshzda Cherbakov from Tver tells us about Grote Reber. Dr Ian Musgrave tells us "What's up inShow More Summary

Rosetta end-of-mission plans: Landing site, time selected

ESA's comet-chasing Rosetta spacecraft is nearing the end of its mission. Last week, ESA announced when and where Rosetta is going to touch down. And tomorrow, it will forever shut down the radio system intended for communicating with the silent Philae lander.

We’re Building a Movement!

Today we launch a new expedition to engage our members in more ways than ever before. Since our inception, our members have supported The Planetary Society as we forge new paths in space science and exploration. You have always beenShow More Summary

Southern Delta Aquariid Meteor Shower 29-31 July, 2016

23 hours agoAcademics / Astronomy : Astroblog

Evening sky looking east from Adelaide at 2 pm local time on July 30th in South Australia. The cross marks the radiant (the point where the meteors appear to originate from) of the Southern Delta Aquariids. Similar views will be seen...Show More Summary

The Sky This Week - Thursday July 28 to Thursday August 4

23 hours agoAcademics / Astronomy : Astroblog

The New Moon is Wednesday August 3. Venus and Mercury rise in the early evening sky. The Moon is close to Venus on Thursday August the 4th Jupiter is visible in the early evening. Mars and Saturn are visible all evening long. Saturn is close to the red star Antares and forms a triangle with Mars. Show More Summary

Asteroid Collisions Create a Forbidden Crystal

Crystals are pretty. They’re also pretty interesting. They’re found in nature in stunning variety, including all kinds of bizarre shapes. I find a lot of these shapes pleasing aesthetically due to their symmetry. Some are box-shaped, some hexagonal… but they’re all fascinating. Crystals get this symmetry because of the way atoms interact. Show More Summary

More Evidence that Dinosaurs Suffered a One-Two Extinction Punch

What killed the dinosaurs? That was a mystery for decades; when I was a kid there were tons of ideas but precious little evidence for any of them, making them little more than speculation. In the late 1970s and early 80s, though, the...Show More Summary

Time-Lapse: The Skies Over Dry Tortugas

How have I never heard of Dry Tortugas National Park until now? It’s a little over 100 km west of Key West, Florida, in the Gulf of Mexico. It’s pretty remote, accessible only by boat or seaplane, and has an interesting history. It’s...Show More Summary

Rosetta’s Final Resting Place Has Been Chosen

On Sept. 30 at approximately 10:30 UTC (06:30 EDT), the Rosetta mission will come to an end. After many days of slowly approaching the comet 67P/Churyumov-Gerasimenko—sending images and data back to Earth the whole way—it will settle...Show More Summary

Trilobites: How Mountains Obscured by Venus’s Clouds Reveal Themselves

Data from Europe’s Venus Express spacecraft has helped researchers better understand the hurricane-like winds that blast the second planet from the sun.

Trilobites: South African Telescope Spots 1,300 Unknown Galaxies

The distant galaxies were recorded by a set of 16 antennas that will eventually be a part of the largest telescope ever built on Earth.

EPIC Earth: A Year of Days from Space

NASA has released a pretty amazing video: It consists of over 3000 images of Earth taken by the Earth Polychromatic Imaging Camera (EPIC) on the DSCOVR spacecraft. DSCOVR is in a special orbit, 1.5 million kilometers closer to the Sun than Earth, that keeps it more or less between the Earth and Sun. Show More Summary

Astrophiz Podcast 3 is Out

The Astrophiz podcast is out, Interview: Dave Hunter - Magnetometers and interpreting heliophysical satellite data. History & Theory of radio astronomy: Dr Nadeshda Cherbakov tells us about Karl Jansky. ANNNDD someone you might recognize talking about what is up in the sky this week.

The Planetary Society at San Diego Comic-Con

Whether or not you're attending San Diego Comic-Con, you can enjoy a discussion panel with Emily Lakdawalla and five science fiction authors about the future of science fiction in the context of today's amazing scientific advances.

See the ISS buzz Jupiter and Mars AGAIN (22-23 July, 2016)

The ISS passes between Mars, Saturn and Antares, as seen from Adelaide on the evening of Friday 22 July at 18:03 ACST. Simulated in Stellarium (the ISS will actually be a bright dot), click to embiggen. The ISS passes near Antares and Saturn, as seen from Alice Springs on the on the evening of Saturday 23 July at 18:46 ACST. Show More Summary

These Are the Anti-Heroes We Don't Deserve

So you’re anti-reality and anti-human-driven climate change, but you can’t find any way to get your kids to listen to you about it? I have just what you need: Anti-heroes for the age of anti-science. Presenting Climate Inaction Figures!...Show More Summary

Multimedia recap: Two launches, a landing, a docking, and a berthing

Four days of cargo craft mania came to a close at the International Space Station this morning, as astronauts Kate Rubins and Jeff Williams snagged an approaching SpaceX Dragon vehicle and berthed it to the laboratory's Harmony modu...

March … I Mean April… I Mean May… I Mean June 2016 Is the 6th … I Mean 7th… I Mean 8th … I Mean 9th Temperature Record-Breaking Month in a Row

N.B. If this article sounds familiar, it should. This has been happening so frequently I just copied the post for March April May and updated it. October. November. December. January. February. March. April. May And now June. For the...Show More Summary

The GOP Fiddles While America Burns

You want to know the very definition of irony? While the Republican National Convention is going on in Ohio—loaded to the hilt with people who deny the reality of global warming—the country itself is baking under a heat wave that isShow More Summary

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