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Constellations
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Slide 40

Different sets of constellations are visible in northern and southern skies.

Different sets of constellations are visible in northern and southern skies.

The Altitude of the celestial pole (Polaris) = your latitude

Slide 41

Counter-Clockwise Rotation

Counter-Clockwise Rotation

Clockwise Rotation

Northern Hemisphere

Southern Hemisphere

The Altitude of the celestial pole (Polaris) = your latitude

Slide 42

Right Ascension and Declination

Right Ascension and Declination

Right Ascension (RA): Analogous to longitude, but on the celestial sphere.

It is the east-west angle between the vernal equinox and a location on the celestial sphere.

Declination (dec): Analogous to latitude, but on the celestial sphere.

It is the north-south angle between the celestial equator and a location on the celestial sphere.

Slide 43

Right Ascension and Declination

Slide 44

Units of R.A.

Units of R.A.

360o = 24h

 15o/h

Slide 45

Azimuth and Altitude are observer centric.

Azimuth and Altitude are observer centric.

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