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Astronomy 101 - Free Online Astronomy Course

By February 14, 2005

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Webster’s Dictionary defines Astronomy as “the study of objects and matter outside the earth's atmosphere and of their physical and chemical properties.” Truthfully, though, you could say that astronomy is the study of everything, because everything is a part of the Universe.

Earn a certificate while broadening your horizons with this free basic astronomy course. Learn at your own pace.

African-American History Month continues. African-Americans have played a major role in the history of the United States of America and have much to be proud of. Here, we would like to celebrate just a few of the achievements of African-Americans in the fields of astronomy and space. Today, we highlight the first African-American in space, Guion “Guy” Bluford.
  • Learn more about astronomy and earn a certificat with Astronomy 101.
  • So much information, so little time. Discover more about astronomy and space with these Essentials.
  • Isn't it time we space enthusiasts had our own holiday? Start making your plans now to celebrate Space Day in May.
  • Forum Post of the Day:

    Subject: Why go to mars?
    "Why to (sic) we even want to go to mars. Is it just a human thirst for knowledge and exploration or just a way for the u.s. to get more glory. I just don't see the benfits. When we went to the moon we spent billions. For what? International pride?! Afterwards, poverty was not eradicated, there was no economic boom, we found no aliens. What are we looking for on mars. Space rocks, dry ice? Those things seem pretty useless. I doubt we can even think about colonization for about 200 more years. Now think about this what have we gained by exploring space besides pride, and some knowledge. Now think of what we have lost. I would estimate close to 1,000,000,000,000 (that's 1 trillion) dollars."
  • The Sky is NOT The Limit. Inspire yourself and others with this Women's T-Shirt from About Astronomy & Space. See all available items.
  • Check out our Gift Guide
  • * Spotlight: Dick Scobee was spacecraft commander on STS 51-L (Space Shuttle Challenger) which was launched from Kennedy Space Center, Florida, at 11:38:00 EST on January 28, 1986.

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