Star System Generator
1: Generate Star
Roll 1d10
1: Class A White Star
2: Class B Blue-White Star
3: Class F Yellow-White Star
4-5: Class G Yellow Star
6: Class K Orange Star
7-8: Class M Red Star
9: Class O Blue Star
10: Pulsar
1A: Generate Number of Stars
Roll 1d10
1-5: Single Star
6-8: Binary
9-10: Trinary
2: Generate Planets
Roll 1d20
1-2: No Planets
3-6: 1d6 Planets
7-10: 1d10 Planets
11-12: 1d10+3 Planets
13-16: 2d10 Planets
17-20: 2d10+2 Planets
3: Roll for Asteroid Belt
Roll 1d6
1-2: No Asteroid Belt
3-4: Thin Asteroid Belt
5-6: Thick Asteroid Belt
4: Misc. Phenomenae
Roll 1d10
1-2: 1d10 Comets, Meteors and Asteroids
3-4: nearby Neutron Star
5-6: nearby Qusaroid, Pulsar, Neutron or Ion Storm
7-8: Oort Cloud
9-10: 1d10 Large Planetoids, 3d10 Comets, Meteors and Asteroids, 1d4 other phenomenae
5: Roll for each Planet Type
Roll 1d10
1-3: Small Rocky World
4-7: Normal Rocky World
8-10: Gas Giant or Brown Dwarf
6: Small Rocky World Type
Roll 1d10
1-3: Class I, 2d6x200 km diameter, Moon Chart A
4: Class O or Q, 2d6x225 km diameter, Moon Chart A
5: Class P, 1d6x1000 km diameter, Moon Chart A
6: Class R, 1d8x1000 km diameter, Moon Chart B
7-8: Class J, 1d10x1000 km diameter, Moon Chart B
9-10: Class K, 1d10x1000 km diameter, Moon Chart B
7: Normal Rocky World Type
Roll 1d10
1-2: Class C, 0.5g-1.5g (1g = 13,000 km diameter), Moon Chart B
3: Class G, 0.5g-1.5g (1g = 13,000 km diameter), Moon Chart B
4: Class E, 0.5g-1.5g (1g = 13,000 km diameter), Moon Chart B
5: Class F, 0.5g-1.5g (1g = 13,000 km diameter), Moon Chart B
6: Class L, 0.5g-1.5g (1g = 13,000 km diameter), Moon Chart B
7: Class M, 0.5g-1.5g (1g = 13,000 km diameter), Moon Chart B
8: Class N, 0.5g-1.5g (1g = 13,000 km diameter), Moon Chart B
9: Class D or Y, 0.5g-1.5g (1g = 13,000 km diameter), Moon Chart B
10: Uberearth, any of the above, 2d10+5x1000, Moon Chart C
8: Gas Giant Type
Roll 1d10
1-3: Ice Giant, 1d100x1000 km diameter, Moon Chart D
4-7: Gas Giant, 1d100x6000 km diameter, Moon Chart D
8-10: Brown Dwarf, 1d100x16000 km diameter, Moon Chart D, also maybe have 1d of planets
Appendix A Moon Chart
Roll 1d10
1-7: 0
8: 1
9: 2
10: 3
Appendix B Moon Chart
Roll 1d10
1-2: 0
3-5: 1
6-7: 2
8-9: 3
10: 4
Appendix C Moon Chart
Roll 1d10 to get number of moons
Appendix D Moon Chart
Roll 1d100 to get number of moons
For Graphical representation of this system, photomanipulate this image;