Earth in the Universe

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Across
  1. 4. the time or date (twice a year) at which the sun crosses the celestial equator, when day and night are of equal length
  2. 6. an elongated circle, or oval shape ,the shape of the planets orbit
  3. 7. a group of stars that form a pattern in the sky
  4. 8. unmanned spacecraft that can collect data with scientific instruments and communicate with the Earth
  5. 10. satellite an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication
  6. 12. objects that orbit the earth that are not man made- the moon is an example
  7. 13. a vehicle sponsored by sixteen nations that circles the earth while carrying out experiments
  8. 16. a telescope that uses convos lenses to gather and focus light
  9. 20. the movement of an object around another object
  10. 22. the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
  11. 23. the spinning of Earth on its axis
  12. 24. shuttle a reusable spacecraft with wings for a controlled descent through the Earths atmosphere
Down
  1. 1. large space telescope able to see farther than any other telescope at the end of the 20th century
  2. 2. an attractive force that acts between any two objects
  3. 3. occurs when the Moon passes directly between the Sun and the Earth and casts a shadow over part of Earth
  4. 5. the two days of the year on which the sun reaches its greatest distance north or south of the equator
  5. 9. a telescope that uses a curved mirror to collect and focus light
  6. 11. all of the frequencies or wavelengths of electromagnetic radiation
  7. 14. the regular rise and fall of the oceans surface influenced by the moons gravity pulling on earth
  8. 15. special engine that can work in space and burns liquid and or solid fuel
  9. 17. a collection of stars, dust, and gas bound together by gravity
  10. 18. a division of the year that is characterized by recurring weather conditions and determined by both Earths tilt relative to the sun and Earths position in its orbit around the sun
  11. 19. a mixture of gases the surrounds a planet or moon
  12. 21. a device built to observe distant objects by making them appear closer