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;