solar system

Forum discussion tagged with solar system.
  1. JLivingstonSG

    Question Solar sail acceleration

    Hi. What if we build hundreds of large solar reflectors that can then focus sunlight on a solar sail space craft. How many square miles of sun reflectors would be needed to accelerate a spacecraft at 1 g, on lets say 100 tons to 90% of the speed of light in lets say 3 years ? Regards from...
  2. Astro-guy

    Do you think humans should colonize other planets and exploit their resources, too?

    This is a moral question, which has been concerning me. I would like to know every ones opinions.