ASTR 1102 Chapter : Class 4
Class 4 Wednesday, January 26, 2010
Why is the sky blue?
• Blue light scatters more
Skylight is all scattered → Blue
• Look at the sun and objects may appear more red
Why is the setting sun red?
• No blue light gets through
The sky is often colorful
• Iridescent clouds
• Red clouds at sunset – BONUS POINTS
• Green Flash at sunset
• Belt of Venus
• Sun dog
• Lunar eclipse
• Rainbow
• Circumzenthial arc
Aurora
• Most often up north
Stars in the night sky
• stars form patterns – constellations
o BONUS FOR LOOKING UP AT THE SKY EMAIL HIM BEFORE END OF
SEMESTER
• Big dipper
Greek Constellations
• Leo (Lion)
• Scorpius (the scorpion)
• Taurus (the bull)
• Ariga (Charioteer)
• The Swan
Perseus Tableaux
