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Science, Evolution, and Creationism, by the National Academies, focuses on teaching evolution in today's classrooms. Check out the other publications in our online store.

Sun Reference Data

Diameter: 1.4 million km
(870,000 miles)

Age: 4.5 billion years
Mass: 330,000 x Earth Distance from Earth: 149.6 million km (93 million miles)
Density: 1.41 (water=1) Distance to Nearest Star: 4.3 light years
Solar Wind Speed: 3 million km/hr. Luminosity: 390 billion billion megawatts
Solar Cycle: 8 - 11 years Temperature at surface: 5,500o C (9,932o F)
Temperature at Core: 14 milliono C (22.5 milliono F) Temperature of Sunspots: 4,000o C (7,232o F)
Rotation Period at Equator: 25 Earth days Rotation Period at Poles: 35 Earth days

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF