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  2. Milky Way - Wikipedia

    en.wikipedia.org/wiki/Milky_Way

    The Sun, and thus the Solar System, is located in the Milky Way's galactic habitable zone. [98] [99] There are about 208 stars brighter than absolute magnitude 8.5 within a sphere with a radius of 15 parsecs (49 ly) from the Sun, giving a density of one star per 69 cubic parsecs, or one star per 2,360 cubic light-years (from List of nearest ...

  3. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    The Solar System's location in the Milky Way is a factor in the evolutionary history of life on Earth. Spiral arms are home to a far larger concentration of supernovae , gravitational instabilities, and radiation that could disrupt the Solar System, but since Earth stays in the Local Spur and therefore does not pass frequently through spiral ...

  4. Location of Earth - Wikipedia

    en.wikipedia.org/wiki/Location_of_Earth

    Orbit of the Solar System: 17,200 pc 5.31×10 17: 17.72: The average diameter of the orbit of the Solar System relative to the Galactic Center. The Sun's orbital radius is roughly 8,600 parsecs, or slightly over halfway to the galactic edge. One orbital period of the Solar System lasts between 225 and 250 million years. Milky Way Galaxy: 30,000 pc

  5. Oort cloud - Wikipedia

    en.wikipedia.org/wiki/Oort_cloud

    In the charted regions of the Solar System, these effects are negligible compared to the gravity of the Sun, but in the outer reaches of the system, the Sun's gravity is weaker and the gradient of the Milky Way's gravitational Galactic Center compresses it along the other two axes; these small perturbations can shift orbits in the Oort cloud to ...

  6. Outline of Earth - Wikipedia

    en.wikipedia.org/wiki/Outline_of_Earth

    Orion Arm – a spiral arm of the Milky Way. Solar System – the Sun and the objects that orbit it, including eight planets, the third planet closest to the Sun being Earth. Earth's orbit – path through which the Earth travels around the Sun. The average distance between the Earth and the Sun is 149.60 million kilometers (92.96 million miles).

  7. Historical models of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Historical_models_of_the...

    The presumed distance of the Oort cloud compared to the rest of the Solar System. The Sun is a lone, G-type main-sequence star inside the galaxy of the Milky Way , surrounded by eight major planets orbiting the star by the influence of gravity, most of them with a cohort of satellites, or moons , orbiting them.

  8. List of smallest known stars - Wikipedia

    en.wikipedia.org/wiki/List_of_smallest_known_stars

    Part of a symbiotic binary star system containing a red giant and a white dwarf. As in 2019, with mass 67.54 ± 12.79MJ (0.0523-0.0767 M☉) is the lowest known mass hydrogen-burning star. Luhman 16 B and Luhman 16 A are the closest brown dwarf stars to Earth, and the third-nearest star system to the Solar System.

  9. TON 618 - Wikipedia

    en.wikipedia.org/wiki/TON_618

    TON 618 (abbreviation of Tonantzintla 618) is a hyperluminous, broad-absorption-line, radio-loud quasar and Lyman-alpha blob [2] located near the border of the constellations Canes Venatici and Coma Berenices, with the projected comoving distance of approximately 18.2 billion light-years from Earth.