page_title: Hubble volume
hierarchical_section_title: Hubble volume
caption_attribution_description: English: "A simulated view of the entire observable universe", approximately 93 billion light years (or 28.5 billion parsecs) in diameter. The scale is such that the fine grains represent collections of large numbers of superclusters. The Virgo Supercluster—home of Milky Way—is marked at the center, but is too small to be seen in the image. Uploader did not explain what the "simulation" is based on? Was any observational data taken into account, or is this a purely fictional simulation of a distribution loosely similar to that found in observation?
context_page_description: In cosmology, a Hubble volume or Hubble sphere is a spherical region of the observable universe surrounding an observer beyond which objects recede from that observer at a rate greater than the speed of light due to the expansion of the Universe. The Hubble volume is approximately equal to 10³¹ cubic light years.
  The proper radius of a Hubble sphere is, where is the speed of light and is the Hubble constant. The surface of a Hubble sphere is called the microphysical horizon, the Hubble surface, or the Hubble limit.
  More generally, the term "Hubble volume" can be applied to any region of space with a volume of order.
  However, the term is also frequently used as a synonym for the observable universe; the latter is larger than the Hubble volume.
context_section_description: In cosmology, a Hubble volume or Hubble sphere is a spherical region of the observable universe surrounding an observer beyond which objects recede from that observer at a rate greater than the speed of light due to the expansion of the Universe. The Hubble volume is approximately equal to 10³¹ cubic light years.
  The proper radius of a Hubble sphere (known as the Hubble radius or the Hubble length) is , where  is the speed of light and  is the Hubble constant. The surface of a Hubble sphere is called the microphysical horizon, the Hubble surface, or the Hubble limit.
  More generally, the term "Hubble volume" can be applied to any region of space with a volume of order .  
  However, the term is also frequently (but mistakenly) used as a synonym for the observable universe; the latter is larger than the Hubble volume.
caption: Visualization of the three-dimensional large-scale structure of the universe in the Hubble volume. The scale is such that the fine grains of light represent collections of large numbers of superclusters. The Virgo Supercluster – home of the Milky Way galaxy – is at the center of a Hubble volume, but is too small to be seen in the image.
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