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  2. Andromeda Galaxy - Wikipedia

    en.wikipedia.org/wiki/Andromeda_Galaxy

    Andromeda Galaxy. A visible light image of the Andromeda Galaxy. Messier 32 is to the left of the galactic nucleus and Messier 110 is at the bottom right. The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224.

  3. Portal:Solar System - Wikipedia

    en.wikipedia.org/wiki/Portal:Solar_System

    This is the boundary of the Solar System to interstellar space. The outermost region of the Solar System is the theorized Oort cloud, the source for long-period comets, extending to a radius of 2000–200 000 AU. The closest star to the Solar System, Proxima Centauri, is 4.25 light-years (269,000 AU) away. Both stars belong to the Milky Way galaxy.

  4. VY Canis Majoris - Wikipedia

    en.wikipedia.org/wiki/VY_Canis_Majoris

    VY Canis Majoris. VY Canis Majoris (abbreviated to VY CMa) is an extreme oxygen-rich red hypergiant or red supergiant (O-rich RHG or RSG) and pulsating variable star 1.2 kiloparsecs (3,900 light-years) from the Solar System in the slightly southern constellation of Canis Major.

  5. Abundance of the chemical elements - Wikipedia

    en.wikipedia.org/wiki/Abundance_of_the_chemical...

    The abundance of elements in the Sun and outer planets is similar to that in the universe. Due to solar heating, the elements of Earth and the inner rocky planets of the Solar System have undergone an additional depletion of volatile hydrogen, helium, neon, nitrogen, and carbon (which volatilizes as methane).

  6. Virgo Supercluster - Wikipedia

    en.wikipedia.org/wiki/Virgo_Supercluster

    Virgo Supercluster. The Virgo Supercluster ( Virgo SC) or the Local Supercluster ( LSC or LS) was a formerly defined supercluster containing the Virgo Cluster and Local Group, which itself contains the Milky Way and Andromeda galaxies, as well as others. At least 100 galaxy groups and clusters are located within its diameter of 33 megaparsecs ...

  7. Alpha Centauri - Wikipedia

    en.wikipedia.org/wiki/Alpha_Centauri

    Alpha Centauri ( α Centauri, α Cen, or Alpha Cen) is a triple star system in the southern constellation of Centaurus. It consists of three stars: Rigil Kentaurus ( α Centauri A ), Toliman ( α Centauri B ), and Proxima Centauri ( α Centauri C ). [14] Proxima Centauri is the closest star to the Sun at 4.2465 light-years (1.3020 pc ).

  8. Local Bubble - Wikipedia

    en.wikipedia.org/wiki/Local_Bubble

    The Local Bubble, or Local Cavity, is a relative cavity in the interstellar medium (ISM) of the Orion Arm in the Milky Way.It contains the closest of celestial neighbours and among others, the Local Interstellar Cloud (which contains the Solar System), the neighbouring G-Cloud, the Ursa Major moving group (the closest stellar moving group) and the Hyades (the nearest open cluster).

  9. Heliosphere - Wikipedia

    en.wikipedia.org/wiki/Heliosphere

    Bottom: Logarithmic scale of the Solar System and Voyager 1 's position.. The heliosphere is the magnetosphere, astrosphere, and outermost atmospheric layer of the Sun. It takes the shape of a vast, tailed bubble-like region of space. In plasma physics terms, it is the cavity formed by the Sun in the surrounding interstellar medium.

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