Search found 4 matches

by AlanConroy
Fri Oct 09, 2015 8:26 pm
Forum: Astrophysics
Topic: the Mathematics of the Milky Way
Replies: 5
Views: 3015

Re: the Mathematics of the Milky Way

Thanks everyone. Stella I went back to basics and did it from first principles and now see how it works. I have much work to do
by AlanConroy
Fri Oct 09, 2015 6:32 pm
Forum: Astrophysics
Topic: the Mathematics of the Milky Way
Replies: 5
Views: 3015

Re: the Mathematics of the Milky Way

Thank you David

Yes I know that but 10 to the 12th is significantly less than 10 to the 9th and 10 tk the 10th combined. The book suggests that 2 components of the Milky Way have greater mass than the estimated total mss
by AlanConroy
Thu Oct 08, 2015 5:08 pm
Forum: Telescopes and instruments
Topic: Battery Pack Recomendation for Dew Heater
Replies: 1
Views: 2228

Re: Battery Pack Recomendation for Dew Heater

I went to Maplin and got a 12v adaptor to plug the usual 'car socket' plug into and run it from the mains when at home. Gave up with rechargeble battery packs
by AlanConroy
Thu Oct 08, 2015 4:52 pm
Forum: Astrophysics
Topic: the Mathematics of the Milky Way
Replies: 5
Views: 3015

the Mathematics of the Milky Way

I am guessing that this is the best place for this question and apologies if not. I am trying to learn the maths behind astronomy. I am told by the OU book 'Introduction to Galaxies and Cosmology' that the estimated mass of the Milky Way is 10 to the power 12 x the mass of the sun. It then goes on t...