• 11 Posts
  • 10 Comments
Joined 1 year ago
cake
Cake day: June 15th, 2023

help-circle





  • Some satellites and rovers have used Radioisotope Thermoelectric Generators (RTGs), which are very different from a nuclear reactor. They use polonium-210, which generates heat, and that heat is converted to electricity with thermocouples. They are low power and inefficient.

    To my knowledge no satellite, with an RTG, has ever used ion propulsion. Few interplanetary satellites have ever even used ion thrusters. Dawn, Hayabusa, and Deep Space 1 are the only I can think of, and they all used solar arrays.

    Ion thrusters are super efficient, but produce extremely small amounts of thrust. They aren’t practical for getting large spacecraft to Mars. These proposed nuclear engines produce large thrust while have efficiency somewhere between regular chemical propulsion and ion propulsion.






  • Ah, I understand now. At least 1 person on this instance has to be subscribed to the community on another instance for it to federate and show up here. All the communities that show up in “All” on this instance are ones that have been subscribed to by at least 1 user on this instance. It is one of the downsides of federation on a small instance, you don’t have a very good “All” to see popular content form communities you aren’t subscribed to.

    There are some tools out there that will force federation with all communities, but the problem with that is it blows up storage requirements.



  • There may be some instances that manually defederated during the whole bot situation. I know there was a tool someone made that automatically updates the defederated list, but I already verified we were off that naughty list. So, it would only be instances that manually defederated that we may still be blocked on. In that case we’d have to message the instance owners and ask to be removed from the list.

    I’m not sure I’m seeing any less communities though, could just be general federation issues. Any specific instances/communities you think are missing?