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  1. www.britannica.com › science › star-astronomyStar | Definition, Light, Names, & Facts | Britannica

    17 de jun. de 2024 · Star, any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources. This article describes the properties and evolution of individual stars. Included in the discussion are the sizes, energetics, temperatures, masses, and chemical compositions of stars.

    • Black Holes

      Star - Black Holes, Gravity, Mass: If the core remnant of a...

    • Stellar Structure

      Star - Fusion, Mass, Energy: To interpret a stellar spectrum...

    • Neutron Stars

      Star - Neutron, Compact, Dense: When the mass of the remnant...

    • Peculiar Variables

      Star - Peculiar Variables: R Coronae Borealis variables are...

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  3. science.nasa.gov › missions › hubblePillars of Creation Star in New Visualization from NASA's Hubble...

    26 de jun. de 2024 · Several stages of star formation are highlighted in the visualization. As viewers approach the central pillar, they see at its top an embedded, infant protostar glimmering bright red in infrared light. Near the top of the left pillar is a diagonal jet of material ejected from a newborn star.

  4. science.nasa.gov › missions › webbNASA’s Webb Opens New Window on Supernova Science

    10 de jun. de 2024 · These exploding stars are so predictably bright that they are used to measure far-off cosmic distances and help scientists to calculate the universe's expansion rate. The team identified at least one Type Ia supernova at a redshift of 2.9.

  5. www.science.org › article › could-super-earths-mini-neptunes-host-life-among-starsCould super-Earths or mini-Neptunes host life among the stars ......

    20 de jun. de 2024 · Perhaps larger super-Earths, which could be wrapped in global oceans, should also be considered. Or maybe an even larger body, a mini-Neptune, could hold a water ocean under a thick hydrogen atmosphere that lets in just enough life-giving light.

  6. science.nasa.gov › nasas-webb-captures-celestial-fireworks-around-forming-starNASA’s Webb Captures Celestial Fireworks Around Forming Star

    Hace 6 días · The cosmos seems to come alive with a crackling explosion of pyrotechnics in this new image from NASA’s James Webb Space Telescope. Taken with Webb’s MIRI (Mid-Infrared Instrument), this fiery hourglass marks the scene of a very young object in the process of becoming a star.

  7. spaceplace.nasa.gov › constellations › enWhat Are Constellations? | NASA Space Place – NASA Science for...

    13 de jun. de 2024 · Astronomers and other scientists study stars and galaxies, most of which are many light-years away from Earth. Studying the scientific properties of these objects in space helps us to understand how the universe was made, what else is out there, and how we fit in.

  8. www.britannica.com › science › galaxyGalaxy | Definition, Formation, Types, Properties, & Facts

    23 de jun. de 2024 · A galaxy is any of the systems of stars and interstellar matter that make up the universe. Many such assemblages are so enormous that they contain hundreds of billions of stars. Galaxies usually exist in clusters, some of which measure hundreds of millions of light-years across.