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  2. Stellar evolution - Wikipedia

    en.wikipedia.org/wiki/Stellar_evolution

    Representative lifetimes of stars as a function of their masses The change in size with time of a Sun-like star Artist's depiction of the life cycle of a Sun-like star, starting as a main-sequence star at lower left then expanding through the subgiant and giant phases, until its outer envelope is expelled to form a planetary nebula at upper right Chart of stellar evolution

  3. List of stellar explosion types - Wikipedia

    en.wikipedia.org/wiki/List_of_stellar_explosion...

    Luminous red nova, an explosion thought to be caused by stellar collision Solar flares are a minor type of stellar explosion [ 1 ] Tidal disruption event , the pulling apart of a star by tidal forces

  4. Future of an expanding universe - Wikipedia

    en.wikipedia.org/wiki/Future_of_an_expanding...

    Up until 2012, there was no way to confirm whether the possible collision was going to happen or not. [19] In 2012, researchers came to the conclusion that the collision is definite after using the Hubble Space Telescope between 2002 and 2010 to track the motion of Andromeda. [20] This results in the formation of Milkdromeda (also known as ...

  5. Solar particle event - Wikipedia

    en.wikipedia.org/wiki/Solar_particle_event

    Post-eruptive loops in the wake of a solar flare, image taken by the TRACE satellite (photo by NASA). In solar physics, a solar particle event (SPE), also known as a solar energetic particle event or solar radiation storm, [a] [1] is a solar phenomenon which occurs when particles emitted by the Sun, mostly protons, become accelerated either in the Sun's atmosphere during a solar flare or in ...

  6. Near-Earth supernova - Wikipedia

    en.wikipedia.org/wiki/Near-Earth_supernova

    The Crab Nebula is a pulsar wind nebula associated with the 1054 supernova.It is located about 6,500 light-years from the Earth. [1]A near-Earth supernova is an explosion resulting from the death of a star that occurs close enough to the Earth (roughly less than 10 to 300 parsecs (pc) [30 to 1000 light-years] away [2]) to have noticeable effects on Earth's biosphere.

  7. The sun just did something weird, and 3 other space stories ...

    www.aol.com/news/sun-just-did-something-weird...

    Space is very big and quite often, very weird. Last week, an image captured by NASA's Reconnaissance Orbiter looked just like a bear, and "The Green Comet" reached its closest point to Earth in ...

  8. A massive asteroid has a chance to hit Earth. Here's what to ...

    www.aol.com/news/massive-asteroid-chance-hit...

    A colossal explosion in the sky, unleashing energy hundreds of times greater than the Hiroshima bomb. A blinding flash nearly as bright as the sun. A blinding flash nearly as bright as the sun.

  9. Type II supernova - Wikipedia

    en.wikipedia.org/wiki/Type_II_supernova

    A Type II supernova or SNII [1] (plural: supernovae) results from the rapid collapse and violent explosion of a massive star. A star must have at least eight times, but no more than 40 to 50 times, the mass of the Sun (M ☉) to undergo this type of explosion. [2]