Astronomy Elearning Video

A few hundred miles above Earth, there is a remarkable telescope with a crystal-clear view across the universe. For two decades, the Hubble Space Telescope has been amassing discoveries that rival those of history's greatest scientists and explorers, making it the most important and productive scientific instrument ever built.

Are we alone in the universe? Or does the cosmos pulse with diverse life forms? This is one of the most profound issues facing mankind—and one of the unresolved questions that science may finally be able to answer in this century. Both scenarios are mind-boggling and, to quote futurist Isaac Asimov, equally frightening. No matter what the answer, the implications are vast.

Who has not gazed with wonder at the night sky, especially from a dark site far away from city lights? The great canopy of stars stretching overhead suggests that our world is part of a vastly larger cosmos. But how large is it? Where do we fit in? And how did it all begin? These questions have puzzled stargazers for thousands of years, and the search for answers helped spark the great advances of the scientific revolution in the 16th and 17th centuries. But only in our own time has the full picture of the true immensity, variety, and surpassing strangeness of the Universe come into focus.

For thousands of years, stars have been the prime example of something unattainable and unknowable—places so far away that we can learn almost nothing about them. Yet amazingly, astronomers have been able to discover exactly what stars are made of, how they are born, how they shine, how they die, and how they play a surprisingly direct role in our lives. Over the past century, this research has truly touched the stars, uncovering the essential nature of the beautiful panoply of twinkling lights that spans the night sky.

In the period 1700-1900, kings and empires rose and fell, but science conquered all, taking the world by storm. Yet, as the 1700s began, the mysteries of the universe were pondered by "natural philosophers"—the term "scientist" didn't even exist until the mid 19th century—whose explanations couldn't help but be influenced by the religious thought and political and social contexts that shaped their world.

The largest planets with their own mini solar systems swarming around them

All human beings, by nature, desire to know." —Aristotle, The Metaphysics. For well over 2,000 years, much of our fundamental "desire to know" has focused on the area we now call science. In fact, our commitment to science and technology has been so profound that these now stand as probably the most powerful of all influences on human culture.