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Related Experiment Videos

Hubble's diagram and cosmic expansion.

Robert P Kirshner1

  • 1Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA. kirshner@cfa.harvard.edu

Proceedings of the National Academy of Sciences of the United States of America
|December 30, 2003
PubMed
Summary

Edwin Hubble's 1929 paper established that galaxy distance is proportional to redshift, a foundational concept in cosmology. This discovery paved the way for understanding the expanding, evolving, and accelerating universe.

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Area of Science:

  • Cosmology
  • Astronomy

Background:

  • Edwin Hubble's 1929 article in PNAS introduced a groundbreaking relationship between galaxy distance and redshift.
  • The findings are fundamental to modern cosmology, influencing terms like the Hubble constant and Hubble's Law.

Purpose of the Study:

  • To analyze the significance of Edwin Hubble's 1929 publication on the expanding universe.
  • To highlight the article's foundational role in cosmology despite historical limitations in data and interpretation.

Main Methods:

  • Analysis of Edwin Hubble's 1929 PNAS article.
  • Review of the historical context and impact of Hubble's findings on cosmological models.

Main Results:

  • Hubble's chief result demonstrated a direct proportionality between a galaxy's distance and its redshift.

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  • The article laid the groundwork for the study of the expanding, evolving, and accelerating universe.

    • Conclusions:

    • Despite systematic errors in distance measurements and alternative early interpretations, Hubble's work remains a cornerstone of cosmology.
    • The article's legacy is its pivotal role in initiating the scientific investigation of cosmic expansion.