Congress Recognized Hubble's Galactic Discovery

Representative Judy Chu honored the 1923 breakthrough that proved galaxies exist beyond the Milky Way.

Updated on Oct. 14, 2026 in Space

The large metal frame of the historic 100-inch Hooker telescope sits beneath an open observatory dome at night. — Representative Judy Chu introduced a resolution to establish National Beyond the Milky Way Day, honoring the 1923 discovery made at Mount Wilson. AI Illustration. Upload story photo >

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Representative Judy Chu introduced a resolution to establish October 5 as National Beyond the Milky Way Day. This recognition celebrates the anniversary of Edwin Hubble identifying a Cepheid variable star in the Andromeda nebula in 1923.

Why it matters

The recognition serves to highlight the significance of historic astronomical discoveries and emphasize the ongoing importance of federal support for scientific research.

Edwin Hubble utilized the 100-inch Hooker telescope at Mount Wilson Observatory to capture the Andromeda nebula. The discovery relied on a distance-calculation relationship first identified by Henrietta Swan Leavitt.

The players

Judy Chu

Representative Judy Chu is a member of the United States House of Representatives who introduced the resolution for National Beyond the Milky Way Day.

Edwin Hubble

Edwin Hubble was a pioneering astronomer whose work fundamentally altered the human understanding of the size and scale of the universe.

Carnegie Science Observatories

Carnegie Science Observatories is a premier astronomical research institution that maintains a vast collection of historic photographic plates from the 20th century.

The details

Using the 100-inch Hooker telescope at Mount Wilson Observatory, Hubble identified a variable star that proved Andromeda is a galaxy distinct from the Milky Way. Carnegie Science currently preserves 250,000 historic photographic plates that document these and other foundational astronomical observations.

Edwin Hubble discovered the existence of galaxies beyond our own in 1923.
Hubble photographed the Andromeda nebula variable star on October 5, 1923.
A celebration was held at Carnegie Science for Beyond the Milky Way Day on October 13, 2026.

The Big Picture

This event marks a formal legislative update to the scientific legacy established by Edwin Hubble's 1923 discovery of the Andromeda galaxy. By codifying this history, the resolution reinforces the paradigm shift that proved our galaxy is not the entire universe.

This initiative raises public awareness of the essential role that historic research institutions play in preserving humanity's scientific record. Residents may gain greater insight into how federal policy supports the continued use of massive archival collections to understand the universe.

The takeaway

Public recognition of scientific milestones helps connect modern citizens to the foundational discoveries that define current space exploration. Implementation of such awareness days can foster broader support for the preservation of institutional scientific archives.