Astronomy – Ch. 17a – Measuring Distance, Size, and Luminosity (6 of 30) Distance to Our Sun 2

Astronomy – Ch. 17a – Measuring Distance, Size, and Luminosity (6 of 30) Distance to Our Sun  2

Astronomy – Ch. 17a – Measuring Distance, Size, and Luminosity (6 of 30) Distance to Our Sun 2

15 Φεβρουάριος 2016
[ot-video][/ot-video]