Astr 201H: Homework Solutions

The solutions for each homework will appear here soon after the due date.

• Final Exam: Fri May 5, 1:15-3:15pm in our classroom; format and sample questions.
• HW38 -- Life in the Universe: Intelligent Life?, due Wed Apr 26.
• HW37 -- Life in the Universe: Chemistry, the Solar System and other Star Systems, due Mon Apr 24.
• HW36 -- Cosmology: Predicting the Future and Fate of the Universe, due Fri Apr 21.
• HW35 -- Cosmology: The Big Bang, due Wed Apr 19.
• HW34 -- Cosmology: Expansion, Redshift, and CMBR, due Mon Apr 17.
• HW33 -- Cepheid Variables, Galaxy Redshifts, the Expanding Universe, and Lookback Time, due Fri Apr 14.
• HW32 -- Clusters of Galaxies and Galaxy Collisions, due Wed Apr 12 (also, final versions of papers due for grading).
• Long Research Paper due in class Mon Apr 10 -- be prepared to read and provide feedback to fellow students.
• HW31 -- Other Galaxies: Types and Sizes, due Fri Apr 7.
• HW30 -- The Galaxy's Rotation Curve and Dark Matter, due Wed Apr 5.
• HW29 -- Closer Looks at the Milky Way's Disk, Nucleus, and Halo, due Mon Apr 3.
• HW28 -- Size and Structure of our Milky Way Galaxy, due Fri Mar 31.
• HW27 -- Evidence for Black Holes, due Wed Mar 29.
• HW26 -- Relativity and Black Hole Theory, due Mon Mar 27.
• HW25 -- Degenerate Star Binaries: The Exploding Star Zoo, due Fri Mar 24.
• HW24 -- The Death of High Mass Stars: Supernovas and Neutron Stars, due Wed Mar 22.
• HW23 -- The Death of Low Mass Stars: Planetary Nebulas and White Dwarfs, due Mon Mar 20.
• HW22 -- Applications of Stellar Evolution: Globular Clusters, Cepheid Variables and Close Binaries, due Fri Mar 17.
• HW21 -- Stellar Evolution for Mass > 0.4 Msun, due Wed Mar 15.
• HW20 -- Introduction to Stellar Evolution, due Mon Mar 13.
• HW19 -- Gas Between the Stars and Star Birth. due Fri Mar 3.
• Mid-Term Exam -- Mon Feb 27, see format and sample questions.
• HW18 -- Observatory Sites and Space Telescopes, due Fri Feb 24.
• HW17 -- Optics and Telescopes, due Wed Feb 22.
• HW16 -- The Modern Scientific Method, due Mon Feb 20.
• HW15 -- Binary Star Motions and the Doppler Effect, due Fri Feb 17.
• HW14 -- Visual Binary Stars and Stellar Masses, due Wed Feb 15.
• HW13 -- Newton's Laws, Gravity and Orbits, due Mon Feb 13.
• HW12 -- Historical Astronomy and Kepler's Laws, due Wed Feb 8.
• HW11 -- The HR-Diagram and Stellar Types, due Mon Feb 6.
• HW10 -- Spectral Classification, Temperatures, and Composition, due Fri Feb 3.
• HW09 -- Stellar Temperature and Atomic Spectra, due Wed Feb 1.
• HW08 -- Stars: Distance, Apparent Magnitude and Absolute Magnitude, due Mon Jan 30.
• HW07 -- Nuclear Power Plants, Electricity, and Alternatives, due Fri Jan 27.
  • link to required readings (see #5 "What Powers Nuclear Power Plants?).
  • link to BG windfarm info.
• HW06 -- The Sun's Interior and What Makes the Sun Shine, due Wed Jan 25.
• HW05 -- Atoms, Temperature and Blackbody Spectra, due Mon Jan 23.
• HW04 -- Light and Spectra, due Fri Jan 20.
• HW03 -- The Solar Atmosphere, due Wed Jan 18.
• HW02 -- Just How Big is Space?, due Fri Jan 13 Wed Jan 18.
• HW01 -- Celestial Tour and Angles, due Wed Jan 11.