Space Systems Vocab

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Across
  1. 6. is a cosmological model of the observable universe from the earliest known periods through its subsequent large-scale evolution.
  2. 10. is a theoretical cloud of predominantly icy planetesimals proposed to surround the Sun at distances ranging from 2,000 to 200,000 au
  3. 13. the range of wavelengths or frequencies over which electromagnetic radiation extends.
  4. 19. all existing matter and space considered as a whole; the cosmos.
  5. 20. a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
  6. 21. is a number which scales, or multiplies, some quantity.
Down
  1. 1. Infrared radiation is popularly known as "heat radiation", but light and electromagnetic waves of any frequency will heat surfaces that absorb them.
  2. 2. an optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified.
  3. 3. a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles).
  4. 4. the Christian Eucharist or Holy Communion, especially in the Roman Catholic Church.: "we went to Mass" "the Latin Mass".
  5. 5. a fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
  6. 7. the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun.
  7. 8. is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly.
  8. 9. a celestial body moving in an elliptical orbit around a star.
  9. 11. the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution
  10. 12. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
  11. 14. a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
  12. 15. an imaginary line about which a body rotates.: "The Earth revolves on its axis once every 24 hours".
  13. 16. an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
  14. 17. the branch of science which deals with celestial objects, space, and the physical universe as a whole.
  15. 18. The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars