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  2. Hubble volume - Wikipedia

    en.wikipedia.org/wiki/Hubble_volume

    Visualization of the whole observable universe.The inner blue ring indicates the approximate size of the Hubble volume. In cosmology, a Hubble volume (named for the astronomer Edwin Hubble) or Hubble sphere, Hubble bubble, subluminal sphere, causal sphere and sphere of causality is a spherical region of the observable universe surrounding an observer beyond which objects recede from that ...

  3. Observable universe - Wikipedia

    en.wikipedia.org/wiki/Observable_universe

    Hubble Ultra-Deep Field image of a region of the observable universe (equivalent sky area size shown in bottom left corner), near the constellation Fornax. Each spot is a galaxy, consisting of billions of stars. The light from the smallest, most redshifted galaxies originated nearly 13.8 billion years ago.

  4. Cosmological horizon - Wikipedia

    en.wikipedia.org/wiki/Cosmological_horizon

    Hubble radius, Hubble sphere (not to be confused with a Hubble bubble), Hubble volume, or Hubble horizon is a conceptual horizon defining the boundary between particles that are moving slower and faster than the speed of light relative to an observer at one given time. Note that this does not mean the particle is unobservable; the light from ...

  5. Observational cosmology - Wikipedia

    en.wikipedia.org/wiki/Observational_cosmology

    Two years later, Hubble showed that the relation between the distances and velocities was a positive correlation and had a slope of about 500 km/s/Mpc. [10] This correlation would come to be known as Hubble's law and would serve as the observational foundation for the expanding universe theories on which cosmology is still based.

  6. Great Observatories program - Wikipedia

    en.wikipedia.org/wiki/Great_Observatories_program

    Hubble can also observe at ultraviolet wavelengths which do not penetrate the atmosphere. Each observatory was designed to push the state of technology in its region of the electromagnetic spectrum. Compton was much larger than any gamma-ray instruments flown on the previous HEAO missions, opening entirely new areas of observation.

  7. Hubble vs. Webb: See side-by-side comparisons of the iconic ...

    www.aol.com/news/photos-webb-telescope-pictures...

    The James Webb Space Telescope’s first images revealed new details of the cosmos, peering farther into space than the Hubble Space Telescope. Hubble vs. Webb: See side-by-side comparisons of the ...

  8. In 'groundbreaking' study, astronomers detect record number ...

    www.aol.com/groundbreaking-study-astronomers...

    In this zoomed-in detail of the Hubble image of Abell 370, the host galaxy where the 44 stars were discovered appears several times: in a normal image (left), and a distorted image appearing as a ...

  9. Cosmic Origins Spectrograph - Wikipedia

    en.wikipedia.org/wiki/Cosmic_Origins_Spectrograph

    The Cosmic Origins Spectrograph is designed to enable the observation of faint, point-like UV targets at moderate spectral resolution, allowing COS to observe hot stars (OB stars, white dwarfs, cataclysmic variables and binary stars) in the Milky Way and to observe the absorption features in the spectra of active galactic nuclei. Observations ...