Articles

Casey Dreier

How much did Project Apollo cost? Planetary Society experts answered that question by revisiting primary sources and reconstructing Apollo's entire cost history from 1960 - 1973.

Justin Foley

LightSail 2 is launching on the next SpaceX Falcon Heavy rocket from Launch Complex 39A at Kennedy Space Center in Florida. It is one payload of many on the mission known collectively as STP-2. Space Test Program (STP) is a crucial part of the US Air Force’s development of advanced technologies in space.

Emily Lakdawalla

The last quarter has seen few changes in the roster of planetary exploration spacecraft. SpaceIL’s lunar lander Beresheet is now on the lunar surface. Its descent on 11 April seemed to go nearly perfectly. Unfortunately, a cascade of events shortly before its planned landing caused it to hit the ground too fast, and it did not survive.

The Planetary Society

The first of two new columns rounds up all the ways Society members are making a difference for space.

Makoto Yoshikawa

IN THE EARLY hours of 22 February, light was just beginning to brighten the campus of JAXA’s Institute of Space and Astronautical Sciences (ISAS) in Kanagawa, Japan. It should have been a quiet time, but the Hayabusa2 control room was packed with people. We were about to land on an asteroid.

Martin Rubin

Rosetta is a European Space Agency mission with contributions from its member states and NASA. Operating such a complex mission with its 11 instruments and Philae lander is a success story in itself, but Rosetta’s greatest success is the science it delivered.

Mike Constantine

Apollo 11’S landing on 20 July 1969 was the day humans first set foot on another world. For the risky, challenging endeavor, NASA sought a smooth landing site, one lacking craters or mountains.

Emily Lakdawalla

Two feature articles bring you the excitement and science of exploring two very different representatives of the solar system's smaller worlds.

Richard Chute

The official launch date is now no earlier than June 24th, and the launch window still opens at 11:30 p.m. eastern time.

Jason Davis

While LightSail 1 and 2 look nearly identical at a glance, there are a few important hardware differences between the two spacecraft.

Jason Davis

The reflective softball-sized sphere will give the spacecraft a visual guide during a second potential sample collection.

Tina Seeger

The next Martian explorer, Mars 2020, currently exists as a robotic skeleton at NASA’s Jet Propulsion Laboratory. Teams across the world are working diligently to construct the instruments that will adorn the rover, inside and out, and thereby give it the tools it needs to explore.

Jason Davis

Next Stop: Space!

Kate Howells

Want to give a presentation on behalf of The Planetary Society in your community? We have tips and tricks for you!

Emily Lakdawalla

Preparations for the ExoMars rover mission are in their final stages. ESA made two announcements today: ExoMars Trace Gas Orbiter is shifting orbit, and they officially opened a new Rover Operations Control Centre (ROCC) in Turin, Italy.

Meg Schwamb

Gonggong is the fan favorite name for this icy distant world, but the International Astronomical Union's (IAU) Committee for Small-Body Nomenclature has the final say.

Emily Lakdawalla

Wispy clouds of stunning beauty fly over Curiosity every evening.

Kate Howells

Watch parties are a fun and informal way to bring together space fans and the public to experience the excitement of space exploration.

Jason Davis

The spacecraft is healthy and safe, but time is running out to collect a second sample from asteroid Ryugu.

Richard Chute

LightSail 2’s launch window opens on June 22, and we are finalizing plans for our launch viewing celebrations. Once we have finished coordinating the details with the Air Force’s STP-2 mission team and the Kennedy Space Center, we will share them with all of our members and backers so that you can join us in person or remotely via the internet.