Astronomy 404
Lecture 5, Sept. 1
Fall 2021
Lecture Notes:
pdf file
Photons in Thermal Equilibrium: Blackbody Radiation
thermal radiation
blackbodies and
Planck / thermal spectrum
; spectrum
simulator
Wien's law
infrared gallery
Helix nebula:
burned-out star
Canine:
optical
and
IR
volcano thermal images:
Kilauea
Hawai'i,
Stromboli
, Sicily
law toasty
example
color temperature:
Orion
,
Gemini
Stefan-Boltzmann law
effective temperature:
the Sun
A Census of Stars: the Hertzsprung-Russell Diagram
Gaia
solar neighborhood HR diagram
, and same
with labels
deluxe labelled HR diagrams
here
and
here
Lecture Archive
Brian D. Fields