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Explore the Universe Universe Home Basics Cosmic History Building Blocks Forces Galaxies Overview Types Evolution Large Scale Structures Black Holes Overview Types Anatomy Black Hole Week Stars Overview Types Multiple Star Systems Planetary Systems Exoplanets Exploration Sensing the Universe Telescopes 101 Observatories More News Deep Dives Quick Reads Graphics GlossaryContinue Reading

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Physics of the Cosmos … Physics of the Cosmos Community Upcoming SIG and SAG… About Community Program Analysis Group (PhysPAG) Science Groups Meetings Cosmic Pathfinders Science Gaps Early Career Workshops Opportunities Missions Studies News & Events Resources   Upcoming Science Interest Group & Science Analysis Group Activities 8 July 2026Continue Reading

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This image from NASA’s Hubble Space Telescope shows Messier 3, a densely packed cluster of stars whose origins may be a merger between globular clusters in the early universe. NASA, ESA, and A. Sarajedini (Florida Atlantic University); Processing: Gladys Kober (NASA/Catholic University of America) This image from NASA’s Hubble Space TelescopeContinue Reading

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Earth Observatory Science Earth Observatory Cottonwood Fire Chars Utah Earth Earth Observatory Image of the Day EO Explorer Topics All Topics Atmosphere Land Heat & Radiation Life on Earth Human Dimensions Natural Events Oceans Remote Sensing Technology Snow & Ice Water More Content Collections Global Maps World of Change ArticlesContinue Reading