What does hubble law mean?

Definitions for hubble law
hub·ble law

This dictionary definitions page includes all the possible meanings, example usage and translations of the word hubble law.

Princeton's WordNet

  1. Hubble's law, Hubble lawnoun

    (astronomy) the generalization that the speed of recession of distant galaxies (the red shift) is proportional to their distance from the observer

Wiktionary

  1. Hubble lawnoun

    states that the velocity at which a distant object is receding from the Earth (as measured by its redshift) is proportional to its distance; observational evidence for an expanding universe

  2. Etymology: After Edwin Powell Hubble, American astronomer

Wikipedia

  1. hubble law

    Hubble's law, also known as the Hubble–Lemaître law, is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance. In other words, the farther they are, the faster they are moving away from Earth. The velocity of the galaxies has been determined by their redshift, a shift of the light they emit toward the red end of the visible spectrum. Hubble's law is considered the first observational basis for the expansion of the universe, and today it serves as one of the pieces of evidence most often cited in support of the Big Bang model. The motion of astronomical objects due solely to this expansion is known as the Hubble flow. It is described by the equation v = H0D, with H0 the constant of proportionality—the Hubble constant—between the "proper distance" D to a galaxy, which can change over time, unlike the comoving distance, and its speed of separation v, i.e. the derivative of proper distance with respect to the cosmological time coordinate. (See Comoving and proper distances § Uses of the proper distance for some discussion of the subtleties of this definition of "velocity".) The Hubble constant is most frequently quoted in (km/s)/Mpc, thus giving the speed in km/s of a galaxy 1 megaparsec (3.09×1019 km) away, and its value is about 70 (km/s)/Mpc. However, the SI unit of H0 is simply s−1, and the SI unit for the reciprocal of H0 is simply the second. The reciprocal of H0 is known as the Hubble time. The Hubble constant can also be interpreted as the relative rate of expansion. In this form H0 = 7%/Gyr, meaning that at the current rate of expansion it takes a billion years for an unbound structure to grow by 7%. Although widely attributed to Edwin Hubble, the notion of the universe expanding at a calculable rate was first derived from general relativity equations in 1922 by Alexander Friedmann. Friedmann published a set of equations, now known as the Friedmann equations, showing that the universe might be expanding, and presenting the expansion speed if that were the case. Then Georges Lemaître, in a 1927 article, independently derived that the universe might be expanding, observed the proportionality between recessional velocity of, and distance to, distant bodies, and suggested an estimated value for the proportionality constant; this constant, when Edwin Hubble confirmed the existence of cosmic expansion and determined a more accurate value for it two years later, came to be known by his name as the Hubble constant. Hubble inferred the recession velocity of the objects from their redshifts, many of which were earlier measured and related to velocity by Vesto Slipher in 1917. Though the Hubble constant H0 is constant at any given moment in time, the Hubble parameter H, of which the Hubble constant is the current value, varies with time, so the term constant is sometimes thought of as somewhat of a misnomer.

ChatGPT

  1. hubble law

    Hubble's law is a foundational concept in astronomy that states that every galaxy in the universe is moving away from every other galaxy, and the speed at which a galaxy is receding is directly proportional to its distance from the observer. This relationship between speed and distance is often summarized in the equation v = Hd, where v is the speed of the galaxy, d is its distance, and H is Hubble's constant. This law provides strong evidence for the theory of the expanding universe.

Editors Contribution

  1. hubble law

    I’m sorry to disappoint the author, and please the astronomers, but the Hubble Constant is a truly fixed constant, as demonstrated by the following equation:- 2 X a mega parsec X C, divided by Pi to the power of 21 = 70.98047. For this equation, a parsec is the standard 3.26 light years. This equation comes from ‘The Principle of Astrogeometry (Kindle Books). As the Hubble Constant is ‘fixed’ in value, its reciprocal of 13.778 billion light years is also ‘fixed’, and so cannot be the age of the universe, but is the Hubble horizon distance ONLY. This proves the random ‘big bang’ is a fake hypothesis, based on the erroneous Friedmann hypothesis. It’s certain you will not understand this equation, but if you do, a proper scientific counter argument will be welcome. A Professor at Imperial College in Kensington, London described this Hubble equation as ‘elegant’, David Hine.


    Submitted by anonymous on December 27, 2019  

Matched Categories

How to pronounce hubble law?

How to say hubble law in sign language?

Numerology

  1. Chaldean Numerology

    The numerical value of hubble law in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of hubble law in Pythagorean Numerology is: 5

Translation

Find a translation for the hubble law definition in other languages:

Select another language:

  • - Select -
  • 简体中文 (Chinese - Simplified)
  • 繁體中文 (Chinese - Traditional)
  • Español (Spanish)
  • Esperanto (Esperanto)
  • 日本語 (Japanese)
  • Português (Portuguese)
  • Deutsch (German)
  • العربية (Arabic)
  • Français (French)
  • Русский (Russian)
  • ಕನ್ನಡ (Kannada)
  • 한국어 (Korean)
  • עברית (Hebrew)
  • Gaeilge (Irish)
  • Українська (Ukrainian)
  • اردو (Urdu)
  • Magyar (Hungarian)
  • मानक हिन्दी (Hindi)
  • Indonesia (Indonesian)
  • Italiano (Italian)
  • தமிழ் (Tamil)
  • Türkçe (Turkish)
  • తెలుగు (Telugu)
  • ภาษาไทย (Thai)
  • Tiếng Việt (Vietnamese)
  • Čeština (Czech)
  • Polski (Polish)
  • Bahasa Indonesia (Indonesian)
  • Românește (Romanian)
  • Nederlands (Dutch)
  • Ελληνικά (Greek)
  • Latinum (Latin)
  • Svenska (Swedish)
  • Dansk (Danish)
  • Suomi (Finnish)
  • فارسی (Persian)
  • ייִדיש (Yiddish)
  • հայերեն (Armenian)
  • Norsk (Norwegian)
  • English (English)

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:


Citation

Use the citation below to add this definition to your bibliography:

Style:MLAChicagoAPA

"hubble law." Definitions.net. STANDS4 LLC, 2024. Web. 26 Apr. 2024. <https://www.definitions.net/definition/hubble+law>.

Discuss these hubble law definitions with the community:

0 Comments

    Are we missing a good definition for hubble law? Don't keep it to yourself...

    Image or illustration of

    hubble law

    Credit »

    Free, no signup required:

    Add to Chrome

    Get instant definitions for any word that hits you anywhere on the web!

    Free, no signup required:

    Add to Firefox

    Get instant definitions for any word that hits you anywhere on the web!

    Browse Definitions.net

    Quiz

    Are you a words master?

    »
    irregularly slashed and jagged as if torn
    A lacerate
    B lank
    C currish
    D splay

    Nearby & related entries:

    Alternative searches for hubble law: