Astronomy Section talk August

On 5 August, club member Dr Bill Rea will be presenting presenting a talk on dark matter:

August meeting: Dark Matter — The Death of Modified Gravity
This talk would review three lines of evidence (galaxy cluster velocity dispersion, galaxy rotation curves, and gravitational
lensing) which lead astronomers believe that there is a substantial amount of dark matter in the universe. I would then give a brief recap
of talk 1 for anyone who missed it. Then cover GW170817 and associated other observations and discuss how this rules out several entire
classes of modified gravity theories leaving modified gravity with almost no viable options.
7:30pm Thursday 5th August, Milton Room, Cawthron Institute.