Lecture 1: The Sky Flashcards

1
Q

Celestial Sphere

A
  • Stars appear to lie on the great celestial sphere around Earth
  • Appears to rotate east to west because of the rotation of the Earth
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2
Q

Measuring Positions in the Sky

A
  • 1 degree (º) = 60 arcmin (‘) = 3600 arcsec (‘’)
  • latitude is declination for sky
  • longitude is right ascension for sky (hrs, min, sec)
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3
Q

Spherical Coordinate System

A
  • Zenith is directly overhead (90º)
  • Azimuth is at horizon (0º)
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