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Planet Earth and lunar moon from space

Where Did the Moon Come From?

Earth from space. Full-hemisphere views of the Earth showing Hurricane Linda at its peak approaching Baja California on 1997 September 11.

What Is Earth’s Velocity?

solar eclipse, sun, moon, astronomy, space

How Do You Tell the Difference Between Total, Annular, Solar, and Lunar Eclipses?

Arrangement of the phases of the moon in total eclipse with Blood Moon

9 Celestial Omens

Solar system illustration. (planets; sun)

Why Are Planets Round?

Discover

President Barack Obama signs the White House Initiative on Educational Excellence for African Americans Executive Order in the Oval Office, July 26, 2012

What Is an Executive Order?

A tornado in rural Iowa sweeps dangerously near a farm. Weather storm

Why Does the United States Have More Tornadoes than Any Other Country?

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

Malayan Leaf Frog - Megophrys nasuta

9 Animals That Look Like Leaves

Washington, D.C. locator map.

What State Is Washington, D.C. In?

Martin Luther King, Jr.

Why We Celebrate MLK Day

Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

5 Remarkably Close U.S. Presidential Elections

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Facts

Also Known As	soda tremolite

Topics

sodic-calcic amphibole group