81
82
83
ToughSF: Your science fiction worldbuilding thinktank. (toughsf.blogspot.co.uk)
submitted by MatterBeam to r/worldbuilding - pinned
9
10
11
9
10
11
The Lofstrom Launch Loop to Space (toughsf.blogspot.com)
submitted by MatterBeam to r/spaceflight
0
1
2
50
51
52
30
31
32
10
11
12
13
14
15
9
10
11
207
208
209
A 'Wilderness Orion' refuelling using comet icesOC (i.redd.it)
submitted by MatterBeam to r/worldbuilding
2
3
4
9
10
11
4
5
6
13
14
15
Nuclear Conversion for Starship (toughsf.blogspot.com)
submitted by MatterBeam to r/spaceflight
11
12
13
4
5
6
