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

Mars Express team readies for Siding Spring

On Sunday, 19 October 2014, at around 18:30 UTC, comet C/2013 A1 – known widely as 'Siding Spring' after the Australian observatory where it was discovered in January 2013 – will make a close fly-by of Mars.

Cosmos with Cosmos Episode 12: Encyclopedia Galactica

Cosmos returns in fine form in its penultimate episode. Sagan explores the historical and scientific precedents for the search for extraterrestrial life (SETI) and our human desires to not be alone in the universe.

Super-close supernova in M82

The astronomy world is all a-twitter this morning over the discovery of a new supernova in M82, a galaxy that's in our astronomical backyard,

Planetary Radio: The Gemini Planet Imager

It's very nice to infer the existence of planets circling other stars. It's even better to see them. This new instrument has just become the most powerful exoplanet viewer yet created.

Shaping the Search for Life

A short film on the Giant Magellan Telescope, which could revolutionize exoplanet research and shape the search for life in the Universe.

A case of the measles for Jupiter?

Amateur astronomer Christopher Go has found Jupiter to be putting on a fun show for observers: it's sprouting little red spots

Neptune: The new amateur boundary?

Can features on Neptune be observed by amateur astronomers? For years, the Hubble Space Telescope and some professional terrestrial observatories have been revealing incomplete belts and spots on the surface of Neptune. Now, spots have been imaged by amateurs.

Why does ISON look green?

You may have noticed that Comet ISON appears to have a green halo in some recent images, but in other images acquired at about the same time, it doesn’t. Thanks to the beautiful new spectrum posted earlier today by Christian Buil, it’s relatively easy to understand why.

Uranus Awaits

It’s been a long time since anyone paid Uranus a visit. The Uranus system is, however, fascinating, as evidenced by the wealth of topics covered by the diverse group of planetary scientists who gathered to discuss it last week at the Paris Observatory.

Our Improved Optical Search for ET

The Planetary Society Optical SETI (OSETI) Telescope was successfully upgraded and fully tested, and is now fully operational looking for aliens. Here are some updates on the performance and progress. In summary, the upgraded telescope is performing just as hoped and is scanning the skies.

Comet ISON lives on! (we think...)

For several weeks now, ground-based observers have been blind to Comet ISON as our local star was sitting directly between us and the comet. I am delighted to share two pieces of good news: first, that ISON is still alive and well, and secondly that it has been recovered.

The Peak of Discovery

This week's Planetary Radio goes on tour at the Mount Wilson Observatory with descendants of its founder.

How radar really works: The steps involved before getting an image

Arecibo Observatory is known for its 1000-foot diameter telescope and its appearances in Goldeneye and Contact. Aside from battling Bond villains and driving red diesel Jeeps around the telescope (grousing at the site director about the funding status of projects is optional), several hundred hours a year of telescope time at Arecibo go toward radar studies of asteroids.

Astronomy Enters a New Era

A live conversation about just a few of the powerful new instruments that will revolutionize our knowledge of the cosmos once again.

< 1 2 34 ... 7 >