Shop Windows to the Universe

Please help support Windows to the Universe, and our activities to help Earth and space science teachers, with a tax-exempt donation today!
The moving Earth.
Corel Corporation.

The Moving Earth

Even though we cannot sense it, the Earth is constantly in motion. In fact, the Earth isn't just moving, it's moving really fast! The fact that we do not feel as if we are moving led people to believe that the Earth is the stationary center of the universe for centuries.

Eventually, astronomers discovered that the only way to explain all of the motions they observed in the sky was if the Earth were really moving. From their observations of the sky, they realized that there are two components to the Earth's motion; the Earth is orbitting the Sun, and the Earth is spinning like a top.

Shop Windows to the Universe Science Store!

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.

Windows to the Universe Community

News

Opportunities

You might also be interested in:

Traveling Nitrogen Classroom Activity Kit

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

Native American Astronomy

People from Asia crossed the Bering Strait into North America. These people were first in this new land and so they are known as Native Americans. Over time, these people broke into tribes (as seen on...more

Archeoastronomy

"The movements of the heavenly bodies are an admirable thing, well known and manifest to all peoples. There are no people, no matter how barbaric and primitive, that do not raise up their eyes, take note,...more

The Stones of Carnac

The stones of Carnac, France, are probably the most famous stones markings outside of those found at Stonehenge in England. There are many, many stones at Carnac. And these stones are very old too, the...more

The Cairns of Clava

Not too far from Loch Ness, there lies three giant tombs made of stones. They are called the Balnuaran of Clava. The Balnuaran of Clava, giant tombs encased in stone, can be found close to Inverness in...more

Cuzco

Cuzco is located in Southern Peru. It is the ancient capital of the Inca Empire. It is the oldest, continuously occupied city in the Americas. In ancient times, Cuzco was the ceremonial capital and hub...more

The Stones of Fossa

The stone structures of England and France are very famous. In Italy, you'll also find standing stones, stone rings, and stone tombs. An example of these stone structures is in Fossa, Abruzzo, in Italy....more

Kepler's 2nd Law: The Speeds of Planets

Kepler's second law he again discovered by trial and error. Kepler realized that the line connecting the planet and the Sun sweeps out equal area in equal time. Look at the diagram to the left. What Kepler...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA