History of Astronomy Part 1

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Across
  1. 4. In 1572, people thought there was a new star in the sky, but Tycho Brache proved that it was a star that had exploded. We call this a _______________.
  2. 5. The astronomer Copernicus made the revolutionary suggestion that the planets orbited the ________.
  3. 7. The ____________ model is the model of the universe where the Earth is at the centre.
  4. 8. Copernicus proposed a ___________ model of the universe where the planets orbit the Sun.
  5. 9. The study of objects beyond Earth's atmosphere.
Down
  1. 1. Circular orbits of planets didn't fit with what we observed in the sky, so Ptolemy suggested the planets also moved in their own ________ while they orbited the Earth.
  2. 2. The astronomer Ptolemy belived that all the planets and stars orbited the _______.
  3. 3. Tycho Brache's biggest contribution to astronomy was to take decades of accurate ___________________.
  4. 4. The _________ method is the process used for testing ideas and theories in science
  5. 6. For a long time astronomers, including Ptolemy and Copernicus believed that the orbits of planets were __________.