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  2. Stellar core - Wikipedia

    en.wikipedia.org/wiki/Stellar_core

    A stellar core is the extremely hot, dense region at the center of a star. For an ordinary main sequence star, the core region is the volume where the temperature and pressure conditions allow for energy production through thermonuclear fusion of hydrogen into helium. This energy in turn counterbalances the mass of the star pressing inward; a ...

  3. Stellar structure - Wikipedia

    en.wikipedia.org/wiki/Stellar_structure

    Stellar structure. Cross-section of the. Stellar structure models describe the internal structure of a star in detail and make predictions about the luminosity, the color and the future evolution of the star. Different classes and ages of stars have different internal structures, reflecting their elemental makeup and energy transport mechanisms.

  4. Stellar evolution - Wikipedia

    en.wikipedia.org/wiki/Stellar_evolution

    Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the current age of the universe. The table shows the lifetimes of stars as a ...

  5. Main sequence - Wikipedia

    en.wikipedia.org/wiki/Main_sequence

    In astronomy, the main sequence is a classification of stars which appear on plots of stellar color versus brightness as a continuous and distinctive band. Stars on this band are known as main-sequence stars or dwarf stars, and positions of stars on and off the band are believed to indicate their physical properties, as well as their progress ...

  6. Stellar atmosphere - Wikipedia

    en.wikipedia.org/wiki/Stellar_atmosphere

    The stellar atmosphere is the outer region of the volume of a star, lying above the stellar core, radiation zone and convection zone. Overview. The stellar atmosphere is divided into several regions of distinct character: The photosphere, which is the atmosphere's lowest and coolest layer, is normally its only visible part.

  7. Pre-stellar core - Wikipedia

    en.wikipedia.org/wiki/Pre-stellar_core

    Pre-stellar core. Pre-stellar cores are the nurseries of new stars, and are an early phase in the formation of low-mass stars, before gravitational collapse produces a central protostar. The spatial distribution of pre-stellar cores shows the history of their formation, and their sensitivity to the physics controlling their creation.

  8. Draper Laboratory - Wikipedia

    en.wikipedia.org/wiki/Draper_Laboratory

    In 1932 Charles Stark Draper, an MIT aeronautics professor, founded a teaching laboratory to develop the instrumentation needed for tracking, controlling and navigating aircraft. During World War II, Draper's lab was known as the Confidential Instrument Development Laboratory. Later, the name was changed to the MIT Instrumentation Laboratory or ...

  9. Stellar black hole - Wikipedia

    en.wikipedia.org/wiki/Stellar_black_hole

    A stellar black hole (or stellar-mass black hole) is a black hole formed by the gravitational collapse of a star. [1] They have masses ranging from about 5 to several tens of solar masses. [2] They are the remnants of supernova explosions, which may be observed as a type of gamma ray burst. These black holes are also referred to as collapsars .

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