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  2. 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.

  3. Cosmic dust - Wikipedia

    en.wikipedia.org/wiki/Cosmic_dust

    Thousands of tons of cosmic dust are estimated to reach Earth's surface every year, [5] with most grains having a mass between 10 −16 kg (0.1 pg) and 10 −4 kg (0.1 g). [5] The density of the dust cloud through which the Earth is traveling is approximately 10 −6 dust grains/m 3. [6]

  4. Outer space - Wikipedia

    en.wikipedia.org/wiki/Outer_space

    The diffuse photoionized gas contains filaments of higher density, about one atom per cubic meter, [145] which is 5–200 times the average density of the universe [146]. The IGM is inferred to be mostly primordial in composition, with 76% hydrogen by mass, and enriched with higher mass elements from high-velocity galactic outflows. [147]

  5. Zone of Avoidance - Wikipedia

    en.wikipedia.org/wiki/Zone_of_Avoidance

    The Zone of Avoidance (ZOA, ZoA), or Zone of Galactic Obscuration (ZGO), [1] [2] is the area of the sky that is obscured by the Milky Way. [ 3 ] The Zone of Avoidance was originally called the Zone of Few Nebulae in an 1878 paper by English astronomer Richard Proctor that referred to the distribution of " nebulae " in John Herschel 's General ...

  6. Dust astronomy - Wikipedia

    en.wikipedia.org/wiki/Dust_astronomy

    In the low-density (H atoms per ) diffuse interstellar medium, dust particles up to micron size couple with gas clouds within a frictional scale of less than 1 pc. Within the denser, colder interstellar medium found in molecular clouds ( n H = 10 8 − 10 12 m − 3 {\displaystyle {10^{8}-10^{12}m^{-3}}} ), the growth of grains occurs through ...

  7. Void (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Void_(astronomy)

    Regions of higher density collapsed more rapidly under gravity, eventually resulting in the large-scale, foam-like structure or "cosmic web" of voids and galaxy filaments seen today. Voids located in high-density environments are smaller than voids situated in low-density spaces of the universe. [3]

  8. Local Interstellar Cloud - Wikipedia

    en.wikipedia.org/wiki/Local_Interstellar_Cloud

    The Solar System is located within a structure called the Local Bubble, a low-density region of the galactic interstellar medium. [5] Within this region is the Local Interstellar Cloud (LIC), an area of slightly higher hydrogen density. It is estimated that the Solar System entered the LIC within the past 10,000 years. [6]

  9. Cosmological principle - Wikipedia

    en.wikipedia.org/wiki/Cosmological_principle

    It is located 2820 Mpc away and consists of galaxies, galactic clusters, gas, and dust. In January 2024, the Big Ring was discovered. It is located 9.2 billion light years away from Earth has a diameter of 1.3 billion light years or around the size of 15 full Moons as seen from Earth. [26]