# Astronomy 100 Starlight, Starbright.

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Astronomy 100 Starlight, Starbright

First star I see tonight I wish I may, I wish I might
Star light, star bright First star I see tonight I wish I may, I wish I might Have the wish I wish tonight

1st GOAL: Understand spectra.
ANSWER NOW: (You will turn this in) Write, discuss, sketch, label – somehow communicate your knowledge and understanding of the electromagnetic spectrum. If you don’t think you have one, write/discuss/sketch/label a rainbow instead. Tell me everything you can. 1st GOAL: Understand spectra. Vocabulary: wavelength, spectra, continuous spectrum, emission spectrum, absorption spectrum, black-body spectrum, electron, energy levels, excited, Doppler effect, red shift, blue shift, metallicity 6:35 (40 minutes) Heat= color. Black body = collisions. Even with elastic collisions, you lose some energy. Energy = light The nature of light. Light is energy. Photons are wavicles Atoms – electrons – energy levels. Wavelength – diff amounts of energy image page 103 7:15 (15 minutes) Break7:30 (30 minutes) Continuous spectrum – black body Planck Curve Emission Spectrum Light Decoders Absorption Spectrum Types of Stars/Types of Spectra Metallicity – how come there’s more than just Hydrogen lines? Annie Jump Cannon! OBAFGKMHow Spectra Look Now Doppler Effect Red-shift Blue-shift8:00 (5 minutes) Review8:05 (15 minutes) Introduce 2 assignments, and make groups.

Antonine-education.co.uk

Different wavelengths are different colors.
Different wavelengths are different energies. Different colors are different energies. If you look directly at a heat source – you get ALL POSSIBLE COLORS – continuous spectrum or “black body” spectrum. If you look at a heated gas you get some colors because it’s not heat, it’s excited electrons.

Continuous Spectrum (Heat)

Physics.uiowa.edu

upei.ca

Spectra Activity

physics.umd.edu

Classification Activity

OBAFGKM Spectra KPNO .9m Telescope, AURA, NOAO, NSF

Solar Spectrum

odin.physastro.mnsu.edu

Review: (You will turn this in)
Define three of these terms: Metallicity Spectrum Excited Spectra Doppler effect Red shift 6:35 (40 minutes) Heat= color. Black body = collisions. Even with elastic collisions, you lose some energy. Energy = light The nature of light. Light is energy. Photons are wavicles Atoms – electrons – energy levels. Wavelength – diff amounts of energy image page 103 7:15 (15 minutes) Break7:30 (30 minutes) Continuous spectrum – black body Planck Curve Emission Spectrum Light Decoders Absorption Spectrum Types of Stars/Types of Spectra Metallicity – how come there’s more than just Hydrogen lines? Annie Jump Cannon! OBAFGKM How Spectra Look Now Doppler Effect Red-shift Blue-shift8:00 (5 minutes) Review8:05 (15 minutes) Introduce 2 assignments, and make groups.

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