How Old is the Universe?
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- Author:
- Charles Bennett
- Subject:
- Science and Technology
- Institution Name:
- NASA
- Collection:
- NASA
- Grade Level:
- Secondary
- Abstract:
Astronomers estimate the age of the universe in two ways: by looking for the oldest stars, and by measuring the rate of expansion of the universe and extrapolating back to the Big Bang. This site explains how these measurements are made and points out the discrepancy in ages derived from the two methods. It features images, background information, and links to other resources regarding the age of the universe.
- Course Type:
- Learning Module
- Languages:
- English
- Material Type:
- Readings
- Media Format:
- Graphics/Photos, Text/HTML
- Conditions of Use:
-
Public Domain
NASA still images; audio files; video; and computer files used in the rendition of 3-dimensional models, such as texture maps and polygon data in any format, generally are not copyrighted. You may use NASA imagery, video, audio, and data files used for the rendition of 3-dimensional models for educational or informational purposes, including photo collections, textbooks, public exhibits, computer graphical simulations, and Internet Web pages. This general permission extends to personal Web pages.
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