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Space Vocab

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  • habitable
    when living creatures are able to live somewhere
  • Molecules
    a tiny chemical piece of something
  • Atmosphere
    the air and gases that surround Earth
  • telescope
    a device that lets us see far away planets
  • Gases
    substances like air, where its molecules can move freely
  • To orbit
    when something in space goes around a star/planet/moon
  • What did scientists find that made them think there might be life on planet K2-18b?
    They found gases that are made by bacteria and small plants
  • Alien
    a living thing from another planet
  • Why do scientists say they need "more information" about planet K2-18b?
    They are not 99.99999%, they are only 99.7% certain. They need more proof.
  • Bacteria
    tiny living things made from one cell
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