Astronomy Picture of the Day ·
The Millennium that Defined Earth
The Astronomy Picture of the Day for December 31, 2000 is “The Millennium that Defined Earth,” an image. It is credited to Credit: Apollo 8 Crew, NASA. The original explanation runs about 129 words.
From the explanation
“When the second millennium began, people generally knew that the Earth was round, but few saw much of it beyond their local village. As the millennium progressed, humans mapped the continents , circumnavigated the globe , and determined the composition of the Earth .”
— APOD editors, December 31, 2000
Read the full explanation on science.nasa.gov
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At a glance
- Date
- December 31, 2000
- Type
- Image
- Credit
- Credit: Apollo 8 Crew, NASA
- Copyright
- No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
- Explanation length
- About 129 words