Articles

Heidi Hammel

Preliminary estimates show that the meteoroid was 15 meters wide and weighed roughly 8000 tons. The resulting airburst would have the equivalent yield of about a 1/2 megaton explosion.

Emily Lakdawalla

A large meteor streaked through the skies above Russia on the morning of Feb 15th, causing a deafening sonic boom that shattered windows and injured hundreds.

Bruce Betts

David Warmflash, who organized a science (and peace) experiment with the Planetary Society for the ill fated STS-107 Columbia mission, reflects on that tragic day ten years ago.

Emily Lakdawalla

Remembering Rick Husband, William McCool, Michael Anderson, Kalpana Chawla, David Brown, Laurel Clark, and Ilan Ramon on the tenth anniversary of the loss of the space shuttle Columbia.

Bruce Betts

Using a Planetary Society provided camera, Gary Hug in Kansas, USA discovered Potentially Hazardous Asteroid 2013 AS27 on Jan. 7, 2013. Shoemaker winner Bob Holmes provided the first follow up observations of this 140m-310m wide asteroid.

Jason Davis

SpaceX's Grasshopper rocket passed its most ambitious test flight yet, rising 12 stories before hovering and settling gently back down onto its landing pad.

Mat Kaplan

Listen to or watch the webcast recorded Saturday, December 15th with MSL Project Manager Richard Cook and Project Scientist John Grotzinger. Bonus: enjoy a neat little French animation.

Jason Davis

Three veteran space travelers are safely in orbit following a 6:12 p.m. (7:12 a.m. EST, 1212 UTC) liftoff from Baikonur, Kazhakstan Wednesday.

Mat Kaplan

Watch the live show at 2pm Pacific on Saturday, December 15 to see Bill Nye, Emily Lakdawalla and the leaders of the Mars Science Laboratory rover mission.

Andrew Chaikin

Today marks the 40th anniversary of the last human footsteps on the Moon. In my latest video I look back at Apollo 17 and explain why I believe the Moon is the solar system's

Jason Davis

North Korea successfully launched their first satellite from the Sohae Satellite Launching Station at 9:49 a.m. local time Wednesday.

Emily Lakdawalla

With all the hoopla surrounding the unknown results of the first analysis of a soil sample by Curiosity's Sample Analysis at Mars (SAM) instrument, I thought an explainer would be useful. What is SAM, what is it designed to measure, and what is the nature of its results? Here you go.

Casey Dreier

MSL Curiosity left the Earth one year ago today. This is my experience of the launch.

Mat Kaplan

This week's Planetary Radio episode presents highlights of the first Curiosity press briefing about the Martian atmosphere, and then takes you to the opening day ceremony for Shuttle Endeavour. You have till Friday, November 9, at 10am Pacific to send your 10th anniversary message to the show and possibly win Bill Nye on your answering machine.

Bruce Betts

Learn about the Planetary Society’s newest project: PlanetVac, with Honeybee Robotics, aims to prototype and test in a huge vacuum chamber a new way to sample planetary surfaces that could be used for sample return or for in situ instruments.

Emily Lakdawalla

Continuing my writeup of notes from last week's Division for Planetary Sciences meeting: presentations on the risks of future asteroid impacts. How much risk do we face, and what are the appropriate actions to take in the face of that risk?

Bruce Betts

Gary Hug used his Shoemaker NEO grant provided camera to find 2012 SY49 which flew by Earth at about two lunar distances last week. The tens of meters wide asteroid is a low-probability possible Earth impactor in the future.

Mat Kaplan

Losing your enthusiasm for space exploration and science Watch these new and terrific videos for an exhilarating shot of Vitamin S.

Emily Lakdawalla

Amateur image processor Tom Dahl's spectacularly high-resolution version of Buzz Aldrin's panoramic view of the Apollo 11 landing site.

Mat Kaplan

The Planetary Society CEO goes to London to MC a live conversation with ISS astronaut Sunita Williams and the kids who've had their experiments conducted in orbit.