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https://www.planetary.org/worlds/what-is-a-planet What Is A Planet? | The Planetary Society Nov 24, 2025 - It's right there in our name: The Planetary Society. But what is a planet? This seemingly simple question is the subject of much debate. planetary society https://www.planetary.org/sci-tech/the-story-of-lightsail-part-3 The Story of LightSail, Part 3 | The Planetary Society Jul 7, 2020 - The final chapter of our three-part LightSail history series details how the loss of Cosmos 1 gives rise to the dream of solar sailing for CubeSats. part 3 planetary society story lightsail https://www.planetary.org/give/living-tributes Living and Memorial Tributes | The Planetary Society Feb 20, 2024 - Celebrate a family member, colleague or friend with a tribute gift honoring them or a special event in their life (a birthday, wedding or other life… memorial tributes planetary society living https://www.planetary.org/articles/were-made-of-starstuff-what-does-that-mean “We’re made of starstuff.” What does that… | The Planetary Society Nov 6, 2025 - Carl Sagan's famous quote is more than just poetic — it's true. planetary society made https://www.planetary.org/space-policy/commercial-spaceflight-principles Commercial Spaceflight Principles | The Planetary Society Aug 23, 2024 - The Planetary Society sees commercial spaceflight as a means to promote our goals in space science and exploration. These policies guide our… commercial spaceflight planetary society principles https://www.planetary.org/space-images/some-of-the-attendees-at-the-2015-planetary-defense-conference-in-frascati-italy Some of the attendees at the 2015 Planetary… | The Planetary Society Mar 10, 2020 - Some of the attendees at the 2015 Planetary Defense Conference in Frascati, Italy planetary society attendees 2015 https://www.planetary.org/space-missions/nea-scout NEA Scout, NASA's solar sail mission to an… | The Planetary Society Apr 19, 2023 - NEA Scout would have used a solar sail to leave the Moon's orbit and visit a near-Earth asteroid. solar sail planetary society nea scout nasa https://www.planetary.org/space-missions/mars-reconnaissance-orbiter The Mars Reconnaissance Orbiter, studying the… | The Planetary Society Nov 24, 2025 - NASA's Mars Reconnaissance Orbiter is an orbiting spacecraft studying the geology and climate of the planet since 2006. It hosts the most powerful… mars reconnaissance orbiter planetary society studying https://www.planetary.org/articles?keywords=neptune Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/articles?keywords=mars Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/articles/how-to-search-for-exoplanets How to Search for Exoplanets | The Planetary Society Jul 23, 2020 - Some methods almost sound like science fiction: Using gravity as a magnifying glass, watching stars wobble at turtle-like speeds, and searching for tiny… planetary society search exoplanets https://www.planetary.org/space-missions/exomars-rover ExoMars Rosalind Franklin rover | The Planetary Society Nov 20, 2025 - The European Space Agency's Rosalind Franklin rover will search for signs of life on Mars. rosalind franklin planetary society exomars rover https://www.planetary.org/sci-tech/demystifying-near-earth-asteroids Demystifying near-Earth asteroids | The Planetary Society Feb 23, 2023 - The Planetary Society is supporting researchers at the University of Belgrade, Serbia, as they work to determine what near-Earth asteroids are made of… near earth asteroids planetary society demystifying https://www.planetary.org/articles/how-to-pick-the-perfect-beginner-telescope How to pick the best beginner telescope | The Planetary Society Apr 8, 2025 - Picking out your first telescope can be overwhelming. This easy-to-follow guide will help you find the best telescope that you'll actually use. best beginner planetary society pick telescope https://www.planetary.org/space-images/artemis-ii-map Artemis II map | The Planetary Society Jan 28, 2026 - Artemis II will be the first crewed flight of NASA’s deep space exploration system, featuring the Orion spacecraft, the Space Launch System (SLS) rocket,… artemis ii planetary society map https://www.planetary.org/space-images/artemis-i-orion-lunar-flyby Artemis I Orion lunar flyby | The Planetary Society Jan 11, 2023 - NASA's Artemis I Orion spacecraft flies past the Moon in this image captured by a camera at the tip of one of the spacecraft's solar arrays on Nov. 21,… lunar flyby planetary society artemis orion https://www.planetary.org/membership?level=Explorer&s_src=homejoin Membership | The Planetary Society Apr 23, 2026 - Explore the membership options of The Planetary Society and join fellow space enthusiasts in advancing space science and exploration. planetary society membership https://www.planetary.org/video/planetary-society-live The Planetary Society Live | The Planetary Society Apr 7, 2026 - Tune in here for live conversations between space experts and Planetary Society members and supporters around the world—that means you! Missed an event?… planetary society live https://www.planetary.org/renew-membership Renew Membership | The Planetary Society Mar 19, 2026 - Renew your membership The Planetary Society and continue to join fellow space enthusiasts in advancing space science and exploration. renew membership planetary society https://www.planetary.org/explore-worlds Explore Worlds | The Planetary Society Nov 2, 2023 - How The Planetary Society works to increase discoveries about the worlds of our Solar System and beyond. planetary society explore worlds https://www.planetary.org/space-images/devils-garden-utah Devils Garden Utah | The Planetary Society planetary society devils garden utah https://www.planetary.org/the-downlink/stellar-death-and-an-artemis-overhaul Stellar death and an Artemis overhaul | The Planetary Society Mar 5, 2026 - A planetary nebula teaches us about how stars die, and a new Artemis architecture changes our plans for Mars. planetary society stellar death artemis overhaul https://www.planetary.org/planetary-radio/2026-astronaut-health-experiments-artemis-ii The astronaut health experiments of Artemis II | The Planetary Society Mar 25, 2026 - Steve Platts, chief scientist of NASA’s Human Research Program walks us through the health experiments aboard Artemis II, followed by Planetary Society… artemis ii planetary society astronaut health experiments https://www.planetary.org/give/new-millennium-committee Soaring higher with the New Millennium… | The Planetary Society Feb 4, 2026 - Gifts from New Millennium Committee members – individuals like you – seed projects. They propel advocacy. They take dreams and turn them into space… planetary society soaring higher new https://www.planetary.org/worlds/earth Earth, our home planet | The Planetary Society Apr 10, 2023 - Earth, the only planet known to support life, offers liquid water, an oxygen-rich atmosphere, and protection from the Sun’s harmful radiation. planetary society earth https://www.planetary.org/lightsail-toolkit LightSail Outreach Toolkit | The Planetary Society Aug 19, 2024 - Equipping you to teach people about solar sailing and The Planetary Society's LightSail program. outreach toolkit planetary society lightsail https://www.planetary.org/space-policy/sts-program-development-cost How Much Did it Cost to Create the Space… | The Planetary Society Apr 5, 2021 - Between 1972 and 1982, NASA spent approximately $10.6 billion to develop the space shuttle and its related facilities. planetary society much cost create https://www.planetary.org/articles?keywords=artemis-2 Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/space-missions/tess TESS, finding new worlds | The Planetary Society Jan 16, 2026 - TESS, or the Transiting Exoplanet Survey Satellites, is a U.S. mission to discover Earth-size worlds around nearby stars. finding new planetary society tess worlds https://www.planetary.org/profiles/rae-paoletta Rae Paoletta | The Planetary Society planetary society rae paoletta https://www.planetary.org/articles/ignition-new-nasa-initiatives 'Ignition': A new series of NASA initiatives | The Planetary Society Mar 25, 2026 - On March 24, 2026, NASA leadership detailed new plans for the agency, involving lunar missions, Mars, and more. new series planetary society ignition nasa initiatives https://www.planetary.org/planetary-radio/2022-chabot-dart-impact-report-and-judy-schmidt DART Impact and Judy Schmidt Interview | The Planetary Society Sep 28, 2022 - Listen as the Double Asteroid Redirection Test spacecraft closes in on asteroid Dimorphos, followed by a triumphant conversation with DART Coordination… planetary society dart impact judy schmidt https://www.planetary.org/membership Membership | The Planetary Society Apr 23, 2026 - Explore the membership options of The Planetary Society and join fellow space enthusiasts in advancing space science and exploration. planetary society membership https://www.planetary.org/space-images/phoenix_dvd_on-mars Visions of Mars, on Mars | The Planetary Society Jul 17, 2020 - This image shows the DVD provided by The Planetary Society to the Phoenix mission, which contains 250,000 names of people who signed up to send their… planetary society visions mars https://www.planetary.org/space-missions/mmx MMX, Japan’s Martian Moons eXploration mission | The Planetary Society Nov 20, 2025 - MMX launches in 2026 to study Mars' moons and return samples from Phobos to Earth in 2031. exploration mission planetary society mmx martian moons https://www.planetary.org/space-images?imgkeywords=lightsail-2-image-from-space The Bruce Murray Space Image Library | The Planetary Society Apr 6, 2026 - The Planetary Society’s Bruce Murray Space Image Library is a unique collection of photos and videos from the world’s space agencies, as well as artwork,… image library planetary society bruce murray space https://www.planetary.org/profiles/lisa-carnell Lisa Carnell | The Planetary Society Apr 1, 2026 - Lisa Carnell is the Director of Biological and Physical Sciences Division at NASA. planetary society lisa carnell https://www.planetary.org/advocacy-action-center?vvsrc=/Campaigns/136028/Respond Advocacy Action Center | The Planetary Society Apr 1, 2026 - The Planetary Society is organizing a new space constituency that is educated, empowered, and loud. advocacy action center planetary society https://www.planetary.org/space-missions/veritas VERITAS, NASA’s Venus mapper | The Planetary Society Jan 16, 2026 - NASA will launch the VERITAS spacecraft no earlier than 2031 to study Venus and its past. planetary society veritas venus mapper https://www.planetary.org/profiles/casey-dreier Casey Dreier | The Planetary Society Feb 13, 2026 - Casey serves as Chief of Space Policy, providing data-driven, nonpartisan analysis of NASA's budget and space politics while leading the organization's… planetary society casey dreier https://www.planetary.org/space-missions/every-moon-mission Every Mission to the Moon, Ever | The Planetary Society Apr 6, 2026 - It only takes a couple days to send most spacecraft to the Moon, so it's not surprising that humans have sent more missions there than anywhere else. The… every mission planetary society moon https://www.planetary.org/give/workplace-giving Workplace Giving | The Planetary Society Jul 14, 2023 - Give a gift – of cash or stock – and multiply it through your employer’s matching gift program. Around the world, corporations, foundations and… workplace giving planetary society https://www.planetary.org/space-missions/juno Juno, NASA’s Jupiter probe | The Planetary Society Jan 16, 2026 - NASA's Juno spacecraft is searching for answers about Jupiter's origins, as well as how the gas giant has changed over time. planetary society juno jupiter probe https://www.planetary.org/give/strategic-partnerships Strategic Partnerships | The Planetary Society Jul 10, 2020 - The Planetary Society’s Corporate Membership Program offers companies of all sizes the opportunity to enhance their presence in the space exploration… strategic partnerships planetary society https://www.planetary.org/space-images/earth-out-the-window-from-orion Earth out the window from Orion | The Planetary Society Apr 3, 2026 - Earth, as imaged out the window of the Orion crew capsule during the Artemis II mission. planetary society earth window orion https://www.planetary.org/articles/your-impact-september-equinox-2023 Your impact: September equinox 2023 | The Planetary Society Aug 31, 2023 - Meet the asteroid hunters you help support. september equinox planetary society impact 2023 https://www.planetary.org/video/nasa-budget-update NASA budget update | The Planetary Society nasa budget planetary society update https://www.planetary.org/about/meet-our-team Meet our Team | The Planetary Society Feb 17, 2026 - Meet the staff of The Planetary Society. planetary society meet team https://www.planetary.org/advocacy/day-of-action-frequently-asked-questions Save NASA Science Day of Action FAQ | The Planetary Society Dec 8, 2025 - Have questions about the Save NASA Science Day of Action? We've got answers. save nasa science action faq planetary society day https://www.planetary.org/space-images/crescent-earth-from-artemis-ii Crescent Earth from Artemis II | The Planetary Society Apr 6, 2026 - A sliver of Earth is illuminated in this photo taken from the Orion spacecraft en route to the Moon during the Artemis II mission. artemis ii planetary society crescent earth https://www.planetary.org/space-missions/change-6 Chang'e-6: Collecting the first lunar farside… | The Planetary Society Mar 3, 2026 - Chang'e-6 brought back the first samples from the far side of the Moon in June 2024. chang e first lunar planetary society 6 collecting https://www.planetary.org/articles?keywords=curiosity Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/space-images/star-party-at-sunset Star Party at Sunset | The Planetary Society Jul 17, 2020 - Star Party at Sunset star party planetary society sunset https://www.planetary.org/space-missions/hubble Hubble, the space telescope exploring the… | The Planetary Society Jan 13, 2025 - Hubble has revolutionized our understanding of the Cosmos large and small. space telescope planetary society hubble exploring https://www.planetary.org/articles?listauthor=bruce-betts Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/space-policy-advocacy Space Policy & Advocacy | The Planetary Society Feb 13, 2026 - Space exploration doesn't just happen—it requires a vigilant and educated public to demand support for this unique program. Be one of them. We'll show you… space policy planetary society advocacy https://www.planetary.org/articles/biggest-little-asteroid-observatory The Biggest Little Asteroid Observatory | The Planetary Society Jul 17, 2020 - The Center for Solar System Studies, a perennial Planetary Society Shoemaker NEO Grant winner, is a small observatory that makes big contributions to… biggest little planetary society asteroid observatory https://www.planetary.org/sci-tech/the-story-of-lightsail-part-1 The Story of LightSail, Part 1 | The Planetary Society Jul 7, 2020 - The first installment of our three-part LightSail history series looks back at the origins of solar sailing and a NASA project to send a giant solar sail… part 1 planetary society story lightsail https://www.planetary.org/space-images/artemis-ii-preflight Artemis II preflight | The Planetary Society Mar 26, 2026 - The Artemis II flight vehicle at Kennedy Space Center in Cape Canaveral, Florida. artemis ii planetary society preflight https://www.planetary.org/space-images/comet-c-2026-a1-maps Comet C/2026 A1 (MAPS) | The Planetary Society Apr 1, 2026 - Comet C/2026 A1 (MAPS) was captured in infrared light by the James Webb Space Telescope's Mid-Infrared Instrument (MIRI) on February 7, 2026. The image… comet c 2026 a1 maps planetary society https://www.planetary.org/support-projects Support Planetary Society Projects | The Planetary Society Mar 24, 2026 - Learn more about the projects of The Planetary Society and how your support can advance space science and exploration. planetary society support projects https://www.planetary.org/outreach-toolkits Give a Presentation | The Planetary Society Aug 19, 2024 - Tips and tools to help you give a great presentation about space science and exploration. planetary society give presentation https://www.planetary.org/space-missions/perseverance Perseverance, NASA's newest Mars rover | The Planetary Society Jan 15, 2025 - NASA's Perseverance rover is searching for past life on Mars and collecting samples for future return to Earth. newest mars planetary society perseverance nasa rover https://www.planetary.org/space-images/bill-nye-head-shot-dark-2015 Bill Nye Head Shot - Dark | The Planetary Society Jun 11, 2020 - Bill Nye Head Shot - Dark bill nye head shot planetary society dark https://www.planetary.org/advocacy/day-of-action The Day of Action | The Planetary Society Feb 3, 2026 - Join us in Washington, D.C. to advocate for space science exploration, April 19th and 20th of 2026. planetary society day action https://www.planetary.org/articles/shoemaker-neo-grant-winner-updates-2025 Updates from our asteroid-hunting Shoemaker… | The Planetary Society Jul 11, 2025 - An overview of updates from some of our previous Shoemaker NEO Grant winners. planetary society updates asteroid hunting https://www.planetary.org/articles?keywords=hubble-space-telescope Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/worlds/venus Venus, Earth's twin sister | The Planetary Society Jan 15, 2025 - Venus hosts brutal conditions today, but the planet may have once been more hospitable to life. twin sister planetary society venus earth https://www.planetary.org/articles/how-do-you-define-a-planet How do you define a planet? | The Planetary Society Mar 16, 2026 - As our ability to study space has improved, our definitions of planets have evolved. planetary society define https://www.planetary.org/space-images/neptune Neptune | The Planetary Society Jul 7, 2020 - Pretty pictures of Neptune. planetary society neptune https://www.planetary.org/space-images/pair-of-protoplanetary-disks Pair of protoplanetary disks | The Planetary Society Apr 3, 2026 - Composite images of two protoplanetary disks, Tau 042021 (left) and Oph 163131 (right), made using data from the NASA/ESA/CSA James Webb Space Telescope… protoplanetary disks pair society https://www.planetary.org/articles?keywords=maven Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/space-missions/osiris-apex OSIRIS-APEX, NASA's asteroid Apophis chaser | The Planetary Society Oct 9, 2025 - The NASA probe is on a mission to the potentially dangerous asteroid Apophis asteroid apophis planetary society osiris apex nasa https://www.planetary.org/articles/how-do-you-fit-the-solar-system-on-a-shirt How do you fit the Solar System on a shirt? | The Planetary Society Dec 16, 2025 - Our newest member perk isn't just a cool piece of apparel — it's a reflection of the science of design. solar system planetary society fit shirt https://www.planetary.org/space-images/planetary-society-members-at-the-2023-day-of-action Planetary Society members at the 2023 Day of… | The Planetary Society Jan 3, 2024 - Planetary Society members at the 2023 Day of Action planetary society 2023 day members https://www.planetary.org/articles/save-nasa-science-day-of-action-recap 300 space advocates rally in D.C. to Save… | The Planetary Society Oct 7, 2025 - The Save NASA Science Day of Action drew nearly 300 people from across the United States to Washington, D.C., to promote space science and exploration. advocates rally planetary society 300 space https://www.planetary.org/articles?keywords=human-spaceflight Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/the-downlink/builders-and-boulders Builders and boulders | The Planetary Society Mar 19, 2026 - Spacecraft are being built, and boulders are solving puzzles. planetary society builders boulders https://win.planetary.org/ The Planetary Society Sweepstakes — Mauna Kea Stargazing Experience planetary society mauna kea stargazing experience sweepstakes https://www.planetary.org/articles/the-quasi-moons-of-earth Earth’s quasi-moons, minimoons, and ghost… | The Planetary Society Oct 29, 2025 - They may not be real moons, but they're worth exploring and studying. planetary society quasi moons https://www.planetary.org/articles?keywords=insight Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/space-images/sirenum-fossae-on-mars Sirenum Fossae on Mars | The Planetary Society Mar 12, 2026 - The edge of a crater near Sirenum Fossae, on Mars, as imaged by NASA's Mars Reconnaissance Orbiter. planetary society fossae mars https://www.planetary.org/articles?listauthor=asa-stahl Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/space-missions/roman-space-telescope Roman Space Telescope, investigating dark… | The Planetary Society Jan 16, 2026 - The Roman Space Telescope is the next step in our hunt for Earth-sized exoplanets and our understanding of mysterious dark energy. roman space telescope planetary society investigating https://www.planetary.org/articles?keywords=humans-to-mars Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/articles?keywords=explaining-policy Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/articles?keywords=voyager-1-and-2 Articles | The Planetary Society Jan 30, 2025 - The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth. planetary society articles https://www.planetary.org/global Global Collaboration | The Planetary Society Mar 24, 2023 - Our global collaboration work cultivates a worldwide movement for space. We engage our network of global members, volunteers, and partners, and harness… global collaboration planetary society https://www.planetary.org/space-images/amateur-images Amateur Space Images | The Planetary Society Jul 8, 2020 - A thriving community of amateur space image processors produces spectacular vistas of alien worlds from the science and navigation data returned to Earth… space images planetary society amateur https://www.planetary.org/about/our-impact/2023-impact-report 2023 Impact Report | The Planetary Society Nov 22, 2024 - Planetary Society members power our mission. Thanks to them, The Planetary Society was able to work effectively in 2023 to increase discoveries in our… 2023 impact report planetary society https://www.planetary.org/sci-tech Science & Technology | The Planetary Society science technology planetary society https://www.planetary.org/articles/what-is-solar-sailing What is solar sailing? | The Planetary Society Jun 29, 2022 - A solar sail, simply put, is a spacecraft propelled by sunlight. Whereas conventional rockets are propelled by the combustion of rocket fuel, a solar sail… planetary society solar sailing https://www.planetary.org/space-missions/mars-express Mars Express, studying Mars from orbit | The Planetary Society Jan 15, 2025 - Mars Express is the European Space Agency’s first planetary mission. mars express planetary society studying orbit https://www.planetary.org/about/our-impact Your Impact | The Planetary Society Nov 14, 2025 - A collection of reports of how members and supporters directly support space science and exploration. planetary society impact https://www.planetary.org/profiles/carl-sagan Carl Sagan | The Planetary Society Feb 4, 2021 - Carl Sagan was Earth's leading advocate for the greatest adventure in human history: missions of discovery to worlds beyond our own. carl sagan planetary society https://www.planetary.org/space-missions/juice Juice, exploring Jupiter’s icy moons | The Planetary Society Nov 20, 2025 - The Juice spacecraft will study Jupiter and its three largest icy moons: Europa, Ganymede, and Callisto. icy moons planetary society juice exploring https://www.planetary.org/space-images/earth Earth and Our Moon | The Planetary Society Jul 17, 2020 - Pretty pictures of Earth and our moon planetary society earth moon https://www.planetary.org/articles/organizing-a-watch-party Organizing a Watch Party | The Planetary Society Dec 21, 2021 - Watch parties are a fun and informal way to bring together space fans and the public to experience the excitement of space exploration. watch party planetary society organizing https://www.planetary.org/articles/three-charts-that-show-how-nasas-artemis-compares-to-apollo 3 charts that show how Artemis compares to… | The Planetary Society Mar 25, 2026 - How do funding, workforce, and robotic lunar exploration compare between NASA's two lunar exploration programs? 3 charts planetary society show artemis compares https://www.planetary.org/space-images/the-history-of-solar-sailing The History of Solar Sailing | The Planetary Society Mar 10, 2020 - The History of Solar Sailing planetary society history solar sailing