ISP Chapter 2 Discovering the Universe for yourself

ISP Chapter 2 Discovering the Universe for yourself -...

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Chapter 2 Discovering the Universe for yourself CONSTELLATIONS – a region in the sky The stars seem to lie on a celestial sphere even though they are at different distances The celestial sphere is divided into 88 constellations The ecliptic is the suns path through the celestial sphere. The constellations along the ecliptic make up the zodiac The milky way in the night sky is actually our view into the disc of the Milky Way galaxy HOW DO WE LOCATE OBJECTS IN THE SKY An objects position in the local sky is given by its altitude above the horizon (in degrees) and its direction along the horizon Draw meridian Latitude –position north or south of equator Longitude- position east or west of prime meridian Your latitude in degrees = that altitude of your celestial pole In the northern hemisphere, stars within an angle equal to your latitude of: o The northern celestial pole NEVER set [ circumpolar ] o The south celestial pole WE NEVER see THE DAILY MOTION Daily circles- CCW looking north, CW looking south WHAT CAUSES THE SEASONS? Seasons occur because the directness of sunlight changes over the year
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ISP Chapter 2 Discovering the Universe for yourself -...

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