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Maria Mitchell

Maria Mitchell was an American astronomer who lived from 1818-1889. She was the first female professor of astronomy in the United States. She discovered the comet of 1847.

After Mitchell's death, a crater on the moon was named after her.


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Science, Evolution, and Creationism

How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable....more

Astronomy throughout History

Astronomers study planets, stars and galaxies. For thousands of years humans have been looking at the sky. Astronomers of the past have found out some really cool stuff, and they didn't even have calculators...more

Comets

Not too long ago, many people thought that comets were a sign that something terrible was about to happen. People didn't understand about how objects in the sky moved, so the sight of a comet must have...more

The Earth's Moon

The Earth may only have one Moon, but it's a big one! The Earth's Moon is the fifth largest in the whole solar system. But it is still smaller than the Earth, so objects weigh less on the Moon than they...more

Charles Darwin

Charles Darwin was an English Naturalist who lived between 1809-1882. One of the most famous and influential scientists of all time, his ideas changed the ways all other scientists thought. Darwin started...more

Christian Doppler

Christian Doppler was an Austrian mathematician who lived between 1803-1853. He is known for a principle he proposed in 1842. This is now known as the Doppler Effect. He thought that the pitch of a sound...more

Ben Franklin

Ben Franklin was an American scientist and statesman who lived between 1706-1790. He studied electricity and learned of its dangers and possible uses. Franklin developed many inventions that made people's...more

Edmond Halley

Edmond Halley was an English astronomer who lived between 1656-1742. He reasoned that the same comet which he saw in 1682 had appeared before and predicted that it would appear again, about every 76 years....more

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