May 31, 2009 – The Horsehead Nebula

The Horsehead Nebula, a dark nebula in the Orion constellation. — Stocktrek Images / Getty Images

• One day humankind may truly explore space, colonize planets, and discover new life.

  But there’s one planet we should never visit

• A nebula is an interstellar cloud of dust, hydrogen gas, and plasma.

  They’re prettier than they sound

• Willamina Fleming first spotted the Horsehead Nebula in a photo taken at the Harvard College Observatory.

  That was back in 1888

• Want to learn more about space?

  Spend some time with Dr. J

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