List of 2009 Astronomy Cast episodes

This is a list of Astronomy Cast episodes released in 2009, with links to relevant Wikipedia articles.

Episode	Subject	Date
#122	How old is the Universe?	January 5, 2009
#123	Homogeneity	January 12, 2009
#124	Space Capsules, Part 1 - Vostok, Mercury and Gemini	January 19, 2009
#125	A Zoo of Extrasolar Planets	February 2, 2009
#126	From Skeptics Guide with Questions	February 9, 2009
#127	The US Space Shuttle	February 16, 2009
#128	Dust	March 2, 2009
#129	Interferometry	March 17, 2009
#130	Radio Astronomy	March 23, 2009
#131	Submillimeter Astronomy	March 30, 2009
#132	Infrared Astronomy	April 6, 2009
#133	Optical Astronomy	April 13, 2009
#134	Ultraviolet Astronomy	April 20, 2009
#135	X-Ray Astronomy	April 27, 2009
#136	Gamma Ray Astronomy	May 4, 2009
#137	Large Scale Structure of the Universe	May 11, 2009
#138	Quantum Mechanics	May 18, 2009
#139	Energy Levels and Spectra	May 25, 2009
#140	Entanglement	June 1, 2009
#141	Volcanoes, Hot and Cold	July 8, 2009
#142	Plate Tectonics	June 15, 2009
#143	Astrobiology	June 22, 2009
#144	Space Elevators	June 23, 2009
#145	Interstellar Travel	June 29, 2009
#146	Astronomy Research from Idea to Publication	July 13, 2009
#147	How to Be Taken Seriously By Scientists	July 20, 2009
#148	Astronomy and New Media	July 27, 2009
#149	Constellation Program	August 3, 2009
#150	Telescopes, the Next Level	August 10, 2009
#151	Atmospheres	August 17, 2009
#152	Binary Stars	August 24, 2009
#153	Dark Skies	August 31, 2009
#154	Dragon*Con Live with Seth Shostak	September 7, 2009
#155	Dwarf Stars	September 14, 2009
#156	Famous Stars	September 21, 2009
#157	Constellations	September 28, 2009
#158	Pulsars	October 5, 2009
#159	Planet X	October 12, 2009
#160	Eclipses	Octiber 19, 2009
#161	Launch Facilities	October 26, 2009
#162	Edwin Hubble	November 2, 2009
#163	Auroras	November 9, 2009
#164	Inside the Atom	November 16, 2009
#165	Doppler Effect	November 23, 2009
#166	Multiverses	November 30, 2009
#167	Future Civilisations	December 7, 2009
#168	Enrico Fermi	December 14, 2009
#169	Fermi Mission	December 21, 2009
#170	Coordinate Systems	December 28, 2009

External links

• Official Astronomy Cast episode archive