JAXA's Hayabusa2 flew within 400 meters (1,300 feet) of asteroid Torifune on July 5 and confirmed that it's a contact binary, two lobes stuck together. Tune in to Planetary Radio to hear what this extended mission flyby revealed about this rare contact binary and what it means for planetary defense. planetary.org/planetary-radi…

Three new projects just got funded thanks to our members and donors — from asteroid-defense tech to mapping the far reaches of the Solar System. Meet this year's STEP Grant winners 🎉 Thank you to our review panel: Jim Bell, planetary scientist at Arizona State University and former president of The Planetary Society Bruce Betts, chief scientist at The Planetary Society John Grunsfeld, planetary scientist and former NASA astronaut Heidi Hammel, vice president of science for the Association of Universities for Research in Astronomy and interdisciplinary scientist for JWST Dipak Srinivasan, member of the Principal Staff at The Johns Hopkins University Applied Physics Laboratory Bell, Grunsfeld, Hammel, and Srinivasan are also members of The Planetary Society’s board of directors. planetary.org/articles/2026-…

NASA's New Horizons is poised to make discoveries about the farthest reaches of our Solar System, but two of its key instruments are in danger of being shut down prematurely. Starting Oct. 1, SWAP and PEPSSI will go dark. The spacecraft itself is healthy, with enough power and fuel to keep functioning until around 2050. Here's what's happening and how you can help save them. ⬇️ planetary.org/articles/swap-…

Did you miss it? The replay is up now 🥳 Jonathan Lunine, chief scientist @NASAJPL, joined The Planetary Society's Sarah Al-Ahmed for a fireside chat live from NASA JPL mission control, and the full conversation is now available to watch on demand. Lunine has spent his career chasing one of science's biggest questions: is there life beyond Earth? After earning both of his graduate degrees at Caltech, he went on to help shape mission after mission, Cassini at Saturn, Juno at Jupiter, and now Europa Clipper, where he's a co-investigator on the spacecraft flying toward one of the most promising places to find life in our solar system. In 2024 he returned to Caltech as professor of planetary science and became chief scientist at JPL. Over 75 minutes, Lunine and Sarah dug into the missions defining the hunt for habitable worlds: Perseverance's Sapphire Canyon sample (the strongest potential sign of ancient life yet found on another planet), Curiosity's organic molecules in Gale Crater, and Europa Clipper's voyage to Jupiter's ocean moon. Mission imagery, video, and live audience questions included. 🎥 Watch now ⬇️piped.video/watch?v=tj3HpiM1…

The September Planetary Report is here! This issue covers the Roman Space Telescope's road to launch, the next wave of Mars missions, and how each mission's discoveries build on the last. Download the magazine and read it for free: planetary.org/planetary-repo…

Today is Star Trek's 60th anniversary! Star Trek changed so much for so many, including us. Read on for a fun fact about our connection to Star Trek. ⬇ Did you know: Gene Roddenberry never publicly endorsed anything to his fans, until The Planetary Society. In late 1979 or early 1980, he broke that rule and wrote to the Star Trek mailing list about a brand new organization founded by Carl Sagan, Bruce Murray, and Louis Friedman to explore the Solar System and search for life beyond Earth. He told them Star Trek was fiction, but its idea was "very real and very important," and that it was this idea The Planetary Society was devoted to. Today, we still strive to support and advocate for a future that allows us to explore the stars and protect space science. We will do everything in our power to "make it so." You can download this image and read the transcript from our website: planetary.org/space-images/2…

Your advocacy works! Congress just passed a bill that delays a rule that would've fundamentally changed how science is done in the United States. This effort was pushed by OMB and would have radically changed how the U.S. funds science. It would've directed political appointees — not scientists — to only approve scientific research in line with the President’s political views. It was set to kick in on October 1. This bill pushes that back to December 11. The rule isn't dead, just delayed. So we have more work to do. Learn more and save this page for updates: planetary.org/save-nasa-scie…

Nancy Grace Roman Space Telescope is set to launch no earlier than this Sunday, August 30. Its field of view will be 100x bigger than Hubble's! Below is a composite image comparing how much of the sky NASA's Nancy Grace Roman Space Telescope covers with how much the NASA/ESA Hubble Space Telescope covers. The white central square is an image of the Pillars of Creation from Hubble, while the surrounding image of the wider Eagle Nebula simulates how much Roman would image in a single observation. The actual wider image is from a ground-based telescope. Composite credit: L. Hustak (STScI)

A SpaceX Falcon 9 upper stage launched in January 2025 just crashed into the Moon. How did it end up there a year and a half later? Find out in today's episode of Planetary Radio. planetary.org/planetary-radi…

Live from JPL Mission Control, a fireside chat that walks through the missions defining the hunt for habitable worlds. ‼️This event is limited to 1,000 participants, register early to save your spot.‼️ In 2025, Perseverance drilled a Mars sample called Sapphire Canyon and found the strongest potential sign of ancient life yet. Was it microbes, or just chemistry? We're closer than ever to knowing. JPL chief scientist Jonathan Lunine has spent his career chasing that question, from Cassini to Juno to Europa Clipper. Join him for a live fireside chat with our own Sarah Al-Ahmed. 📍 Zoom 🗓️ Tuesday, August 25, 12 pm PT 🎟️ Free and open to the public Register: alumni.caltech.edu/event/tec…

We put together some of the coolest images from the 2026 total solar eclipse! Check them out! ⬇️ planetary.org/articles/the-b…

Watch the total solar eclipse LIVE: planetary.org/video/planetar…

IT WORKED! Thousands of Americans sent letters to their senators, and this weekend the Senate passed its version of the government funding bill, including a pause on the OMB rule that would hand political appointees control over federal science grants. The pause runs through December 11, so it's not permanent. But it happened because people spoke up, and the Senate listened. It isn't over, though. The House already passed its own funding bill, and it doesn't include the pause. Now the two chambers have to agree on one final version before the government runs out of funding. Contact your House Representative and tell them to back the Senate's language on the OMB rule: planet.ly/cPbNu

The Senate is about to vote on a bill that blocks political appointees from taking control of federal science grants — including NASA, NIH, and NSF. A YES vote keeps that block in place. Tell your senators to vote YES through this easy-to-use form. It takes 30 seconds. Already signed? Please share! planetary.org/advocacy-actio…

🚨 URGENT ADVOCACY ACTION. We can pause a harmful rewrite of science grant rules, but only if enough of us speak up THIS WEEK. 🚨 OMB proposed a rewrite of the rules that govern how research grants get administered. That rewrite would give political appointees more power to override which projects get funded, based on alignment with administration priorities rather than scientific merit. It was set to take effect October 1. The House already passed its own funding bill (a "clean" CR) that does nothing to stop this. But this weekend, the Senate Appropriations Committee, led by Republican Chair Susan Collins and Democratic Vice Chair Patty Murray, released a bipartisan bill that would fund the government through December 11 AND pause that OMB rule until then. This is the best shot we have before senators leave for August recess. If it doesn't pass this week, we lose momentum and the harmful rule could move forward unchecked. We made it easy to make your voices heard. Send your letter here: planetary.org/advocacy-actio…

Thank you for engaging with our analysis, @NASAAdmin Isaacman. As we stated in the report, this is an exercise worth pursuing. We share your desire to make sure that every decision and every dollar spent creates more wins for science. We agree plutonium shouldn't sit idle. That's why we keep arguing for more resources for NASA science to pursue high-priority missions to the outer solar system. But even if PROMISE comes in below our estimates, there are real opportunity costs in the use of NASA's spare MMRTG and its limited supply of plutonium-238. Using 4.8 kg now is equivalent to nearly 20 years of natural decay losses across NASA's supply. We want to make sure the scientific outcomes justify this cost, should NASA decide to pursue this effort. That's why we recommended incorporating the science goals of Endurance-A: sample collection across the South Pole–Aitken basin by a rover capable of long-distance drives. The science was recommended by the decadal survey and reaffirmed just this week by NASA's own SPARX Science Definition Team. PROMISE may be promising for that task. We look forward to the ongoing conversation about keeping the United States on the cutting edge of scientific discovery.

NASA wants to send Perseverance's engineering twin to the Moon — reusing hardware sounds like a budget-friendly, quick option. But would it actually save money? Our Chief of Space Policy Casey Dreier ran the numbers. Spoiler: it would still cost a fortune and it wouldn't be fast, either. planetary.org/articles/the-c…

On July 20 The Planetary Society joined @JohnsHopkins, @airandspace, @SpaceNews_Inc and the Congressional Planetary Science Caucus with Rep @DonJBacon and @RepJudyChu on Capitol Hill to celebrate the landing anniversary of Viking 1. We gathered with scientists, policymakers, and space advocates to reflect on what Viking taught us and what it set in motion for Mars exploration. Grateful to everyone who came together to mark this milestone in planetary science.

Fifty years ago, the spacecraft that would be the first to successfully land and operate on Mars, Viking 1, would also be a big reason The Planetary Society got founded. Carl Sagan, who worked on Viking, helped choose the landing site and knew Viking would prove something extraordinary: Mars robotic exploration was possible. He knew this spacecraft was going to change the tide. On July 20, 1976, Viking 1 landed successfully on Mars and sent the first photo back. Despite Viking's success there was a continued fight over its funding. After it landed, NASA's planetary program came under pressure as money and attention shifted toward the Space Shuttle. Bruce Murray, who had become JPL's Director just months before Viking landed, watched planetary missions get squeezed out as a result. He and Carl Sagan believed the public's fascination with Mars and other worlds deserved to be matched in Washington's budgets, not dismissed as an excuse to cut funding. A few years after Viking touched down, the two of them, along with Louis Friedman, founded The Planetary Society to make sure Viking's successors wouldn't be lost to the same budget cuts. Fifty years ago, humanity started a robotic journey to Mars with one lander. And it opened a door that robots have been roving through ever since. 1️⃣: The first photograph ever taken on the surface of Mars was obtained by Viking 1 just minutes after the spacecraft landed successfully. 2️⃣: Carl Sagan stands in front of a Viking lander model in Death Valley, California. NASA/JPL 3️⃣: Planetary Society founders Bruce Murray, Carl Sagan, and Louis Friedman.

The comment period for the proposed OMB rule that would shift U.S. science from scientists to politicians is now closed. Now what? We break down what to expect ⬇️  planetary.org/articles/omb-r…