Nothing has been 'proven' and how the dates of construction could be so proven by this method is not clear.
v ASTR 151 -- doing astronomy v ASTR 210 - the sun and it's planets v ASTR 202 - stars, galaxies and the Universe v ASTR 203 - archeoastronomy v ASTR 204 - Einstein's Universe v ASTR 205 - the scale of the Universe v ASTR 206 - life in the Universe v ASTR 221 - stars and planets v ASTR 222 - galaxies and cosmology v ASTR 306 - astronomical techniques v ASTR 309 - astrophysics seminar 1 v ASTR 310 - astrophysics seminar 2 v ASTR 311 - stellar physics v ASTR 323 - THE LOCAL UNIVERSE v ASTR 328 - COSMOLOGY v ASTR 351 - ASTRONOMY CAPSTORE v ASTR 369 - INDEPENDENT RESEARCH v ASTR 396 - SPECIAL TOPICS IN ASTRONOMY