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1) Mars
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Known as the red planet, Mars is the closest planet to the sun. Easily seen from Earth, Mars has intrigued thousands of people throughout history. Many have wondered whether the planet could be inhabited by forms of life; many have dreamed of exploring the planet. Several successful space projects have revealed interesting facts about the history, make-up, and geology of Mars. Although much has been discovered, mysteries surrounding Mars and its moons...
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During the formation of the solar system, not all of the materials in the vast could of dust and gas were used. What happened to the remaining ice, metal, and rock? It formed what became known as asteroids, comets, and meteors. Take a look at the significance of these objects and the possible impact they have on humankind.
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Each night, millions of stars light up the dark skies. Galaxies throughout the universe encompass thousands of stars. The appearance of stars in the sky have intrigued and enthralled humans since ancient time. From constellations to the big bang theory, Stars and Galaxies explores the complex world of astronomy and scientific discovery.
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For centuries, astronomers have placed a special interest on the other planets of the solar system. But with the advent of spacecraft and the tremendous missions undertaken by the Voyager and Cassini probes, astronomers have discovered that the natural satellites of the planets-the solar system's moons-are some of the most extraordinary places imaginable. There are moons with towering geysers, erupting volcanoes, and subterranean oceans of warm, mineral-rich...
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At one time or another, just about everyone has talked about the end of the world. But what does this phrase really mean? Does it mean the end of the human race? The end of planet Earth? The end of our Sun and solar system? And if the world were to actually end, how and when would it happen? People have been asking these questions for thousands of years. Many religious prophets have predicted the end of the world. Science-fiction writers have created...
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In the sixth century B.C.E., the Greek philosopher Anaximander theorized that Earth was at the center of the cosmos. That idea became ingrained in scientific thinking and Christian religious beliefs for more than one thousand years. Defiance of church doctrine could mean death, so no one dared dispute this long-accepted idea. No one except a handful of courageous scientists. In the 1500s and 1600s, men like Nicolaus Copernicus, Johanned Kepler, Galileo...
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Could life have previously flourished on Mars? Will humans be able to travel there one day? Can humans one day colonize the red planet? NASA scientists have been interested in answering questions like these for a long time. In November 2011, NASA sent the rover Curiosity to Earth's nearest planetary neighbor. By gathering information about Mars's climate and geology, the robot is helping scientists uncover the secrets of the planet and its past. Since...
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Huge, towering clouds build up in the sky-it's a super cell. The Doppler radar indicates that the system is rotating. But is there a funnel? Is it touching the ground? Only a storm chaser can confirm when a tornado is present-and help meteorologists warn nearby towns. Whenever severe weather threatens, storm chasers hit the road to hunt for tornadoes, hurricanes, or violent storms. Some drive thousands of miles in just a few days as they follow a...
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Thousands of years ago, humans believed that Earth was the center of the universe, that the world they lived on was all there was. Truthfully, the solar system extends almost halfway to the nearest star. And it is composed of not only planets, asteroids, and comets, but also powerful forces and vast fields of energy. This is our solar system's big backyard.
The cold, dark world that lies at the farthest reaches of our solar system holds a vast collection...
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