Astronomy and Cosmology week 1 - Thursday
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Transcript of Astronomy and Cosmology week 1 - Thursday
Astronomy and Cosmologyweek 1 - Thursday
• 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 ConstellationsTime: 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 precessionSpace• 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