Enjoying the Night Sky 1 Horizon and Zenith

Enjoying the Night Sky 1

Horizon and Zenith 2

Stars and constellations 3

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Zodiac Constellations 11

Astrophotography All you need: • 35 mm Camera on tripod • Cable shutter release • F-stop on smallest number • Focus to infinity • Fast film (at least 400 speed) Aim the camera, and hold shutter open for • 10 -30 seconds for constellations 12 • As long as you want for star-trails

Star-trails 13

Circumpolar star-trails 14

Why the trails? 15

Sagitarrius and Milky Way: 30 second exposure 16

Wandering Stars: the planets • The ancients knew of seven objects that wandered through the stars (the Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn). They called these wanders the “planets” (from the Greek for wanderer). • All of these objects are visible with the naked eye. 17

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The Moon 19

Earth and Moon compared 20

Phases of the Moon 21

Eclipses of the Moon • A lunar eclipse occurs when the Moon passes into the shadow of the Earth. • The lunar eclipse is visible to everyone on the night side of the Earth. • Aristotle (384 -322 B. C. ) used the apparent shape of the Earth’s shadow to show that the Earth is a sphere. 22

Lunar Eclipse 23

Lunar Eclipse 24

Lunar Eclipse Showing Earth’s Shadow 25

Lunar eclipses: 26

Spacecraft (satellites) http: //www. heavens-above. com International Space Station 27