• The Periodic Table Is Made

    The periodic table has the elements on it.
    It's important because it lets us see what elements make what. It was made by John Alexander Reina Newlands.
  • The First Spectrum of A Planetary Nebula

    William Huggins was the first to take the spectrum of a planetary nebula when he analyzed the Cat Eye Nebula. It was important because it can be hard to find new nebulas.
  • Period: to


  • Orgueil meteorite crashs

    The Orgueil meteorite crashed in southwestern France. This was important because it doesn't happen often and it had rare substances in it from space. This meteorite has carbonaceous chondrite in it which means it came from a planet with water and minerals; this type of meteorite isn't very common.
  • Yellowstone Grant

    Abraham Lincoln signed a law that created the Yellowstone Grant, which was to save the land for public use. It later became the first national park in the U.S. in 1872.
  • Spar Topedo Made

    The spar torpedo is made of a bomb placed at the end of a long pole called a spar, hence the name and attached to a boat. The weapon is used by running the end of the spar torpedo into the enemy's ship. Spar torpedoes were often equipped with a barbed spear at the end, so it would stick to wooden hulls. A fuse could then be used to detonate it. The spar torpedo was invented in 1864 during the American Civil War by E. C. Singer. It is important because it helped in big battles on water.
  • Sand Creek Massacre

    The Sand Creek Massacre was a battle in the war between Native Americans and American soldiers. Many Cheyenne and Arapaho died and 10 white men, 9 of which died from friendly fire. It is important because it made Native Americans unwilling to trust the CO government .