Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 8 months ago

What's the difference when a star explodes in a supernova or explodes in a planetary nebula?

5 Answers

Relevance
  • 8 months ago
    Favorite Answer

    The difference is the initial masses of each star and the masses of the cores of each star while they are on the Herzsprung Russel main sequence and are in hydrostatic equilibrium between gravity acting inward and PRESSURE. When a star becomes a red star or a supergiant red star it is because the force of pressure outward is greater than gravity acting inward toward the core.

    When the star runs out of hydrogen in the core, there a helium flash in the layer of hydrogen surrounding the core when the hydrogen tries to fuse I to helium because the pressure is high enough in the hydrogen layer to trigger the helium flash. In low mass star like the Sun the helium flash makes conductive and convective layers explode outward , creating the planetary nebula. The core of the low mass star does collapse some, but it NOT keep collapsing because if degeneracy pressure. The core becomes a white dwarf star where no nuclear fusion is occurring, but the core is still radiating as it cools off.

    Source(s): In a high mass star, Other fusion processes occur in the layer surrounding the stars' core fusing hydrogen into him, helium into carbon, carbon into oxygen,magnesium, calcium silicon and ultimately iron. Then the massive star goes super nova. The conductive and convective layers explode outward while the core collapses to become a neutron star or a black hole with an event horizon.
  • Clive
    Lv 7
    8 months ago

    None. Explosion is explosion and always leaves a nebula behind.

    • Login to reply the answers
  • 8 months ago

    None, really, since all supernovae create planetary nebulae. It's just that not all planetary nebulae are created by supernovae--stars in their red giant phase shed vast amounts of material in the process.

    .

    .

    • Login to reply the answers
  • Retief
    Lv 7
    8 months ago
    • Login to reply the answers
  • How do you think about the answers? You can sign in to vote the answer.
  • Sharon
    Lv 6
    8 months ago

    a planetary nebula is just the gas cloud created when a giant star enters a new phase in its core and burps out its outer layer. Supernovas are far more destructive and violent and only approximately spherical. Classic example the Crab Nebula (M-1)

    • Login to reply the answers
Still have questions? Get your answers by asking now.