Astronomy Picture of the Day · January 1, 2001

The Millennium that Defines Universe

The Astronomy Picture of the Day for January 1, 2001 is “The Millennium that Defines Universe,” an image. It is credited to Credit: Camille Flammarion ; Courtesy: HSC , U. Oklahoma ; Digitization: K. Magruder ( OU ); Coloring: R. J. Nemiroff ( Michigan Tech ). The original explanation runs about 124 words.

From the explanation

“Welcome to millennium three . During millennium two , humanity continually redefined its concept of “Universe”: first as spheres centered on the Earth , in mid-millennium as the Solar System , a few centuries ago as the Galaxy , and within the last century as the matter emanating from the Big Bang .”

— APOD editors, January 1, 2001

Read the full explanation on science.nasa.gov

At a glance

Date: January 1, 2001
Type: Image
Credit: Credit: Camille Flammarion ; Courtesy: HSC , U. Oklahoma ; Digitization: K. Magruder ( OU ); Coloring: R. J. Nemiroff ( Michigan Tech )
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 124 words

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Galaxies

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On this day: January 1 in other years

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Source

Astronomy Picture of the Day, January 1, 2001 — science.nasa.gov/image-article/apod-2001-january-1-the-millennium-that-defines-universe

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.