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Arches National Park Geology Tour provides an extensive, visually rich description of the geology of Arches, by Deborah Ragland, Ph.D. See our DVD collection.
A computer simulation depicting a large chunk of our universe
G. L. Bryan, M. L. Norman, UIUC, NCSA, GC3

The Cosmos

Cosmology is the study of the whole universe. Just what is the Universe? Well, it is everything that exists. However, from Earth we cannot see everything in the Universe. Some things are dark (brown dwarf stars, planets, and Dark Matter) and we cannot see them. And because light travels at a set speed we actually look back in time when we look into the cosmos.

Astronomers see some neat structure in the Current Universe. That structure can tell us much about the History of the Universe. It can also tell us what we can expect for the Future of the Universe and beyond...

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The Summer 2010 issue of The Earth Scientist, available in our online store, includes articles on rivers and snow, classroom planetariums, satellites and oceanography, hands-on astronomy, and global warming.

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Cool It! Game

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

NASA Launches Satellite to Study Big Bang

NASA launched a new satellite called the Far Ultraviolet Spectroscopic Explorer (FUSE). It will help scientists study the Big Bang by looking at light coming from objects far away. This will allow scientists...more

Scientists Find the True Hubble Constant!

Scientists have found the real Hubble Constant after 8 years of research. The Hubble Constant is the rate that the Universe is expanding at. They found it to be 70 kilometers per second per megaparsec....more

Gamma Ray Bursts - The Most Powerful Objects in the Universe?

Satellites in the 1960's looked for a type of light called Gamma Rays. They found bursts of Gamma Rays coming from outer space! They can't hurt you. They are stopped by the Earth's atmosphere. We have...more

Galaxies - Star Cities

When we look up at the night sky, we notice that there are many stars in our sky. Stars must like to live together in star cities - galaxies. Our city of stars is called the Milky Way, and it is home to...more

Neutron Stars

Neutron Stars form when really big stars die. When such a star runs out of fuel its center begins to collapse under gravity. When the center collapses the entire star collapses. The surface of the star...more

Spiral Galaxies

Spiral galaxies may remind you of a pinwheel that blows in the breeze. Like a pinwheel, a spiral galaxy is rotating, and it has spiral arms. Through a telescope or binoculars,a spiral galaxy may look...more

White Dwarfs

When stars like our own sun die they will become White Dwarfs. As a star like our sun is running out of fuel in its center it grows into a red giant. This will happen to our sun in 5 Billion years. The...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