Transcript Space and Time

Astronomy and Cosmology
week 1 - Thursday
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Star Date
Your surveys – results and discussion
Your Web-X posts
Your minilecture sign-ups… BREAK
Introduction to space and time
Workshop: Planispheres + Starry Night
Workshop: Space and Time (go outside if clear)
Tomorrow and next week
Introduction to Space and Time
Naked eye astronomy
Constellations
Time: Sky changes (Starry Night)
• Through the day, due to Earth’s rotation
• Through the year, due to Earth’s orbit
• Through the seasons, due to Earth’s tilt
• Through the epochs, due to precession
Space
• celestial sphere
• Equinoxes, solstices
Naked eye astronomy
What you see depends
on where you are, in
space, time and culture.
Constellations help orient us
Time: Sky changes (Starry Night)
• Through the day, due to Earth’s rotation
• Through the year, due to Earth’s orbit
• Through the seasons, due to Earth’s tilt
• Through the epochs, due to precession
Sky changes through the day, due to Earth’s rotation
Sky changes through the year, due to Earth’s orbit
Sky changes through the seasons, due to Earth’s tilt
Sky changes through the epochs, due to precession
Celestial sphere
Altitude from horizon
Declination from equator (latitude)
Azimuth from North
RA from VE (longitude)
Equinoxes and solstices