There is a way to export full system information. From the System View window (F9), use the Clipboard button at the bottom. You might need to be in SM mode for it to appear. It'll give you this:
Sol-A G2-V Diameter: 1.39m Mass: 1.00 Luminosity: 1.00
Mercury: Colony Cost: 16.21, Temperature: 427.0, Gravity: 0.38, Orbit: 58m
Venus: Colony Cost: 25.00, Temperature: 462.0, Gravity: 0.91, Orbit: 108m
Nitrogen 65%, Carbon Dioxide 35%, Pressure: 100.00
Earth: Colony Cost: 0.00, Temperature: 14.0, Gravity: 1.00, Orbit: 150m
Nitrogen 79%, Oxygen (0.2) 20.0%, Argon 1.00%, Pressure: 1.00
Luna: Colony Cost: 2.00, Temperature: -53.0, Gravity: 0.17, Orbit: 384k
Total Moons: 1
Mars: Colony Cost: 2.00, Temperature: -35.8, Gravity: 0.38, Orbit: 229m
Carbon Dioxide 74%, Argon 15.4%, Nitrogen 10.8%, Pressure: 0.06
Total Moons: 2
Ceres: Temperature: -105.0, Gravity: 0.03, Orbit: 415m
Jupiter: Temperature: -148.0, Gravity: 2.14, Orbit: 780m
Io: Colony Cost: 5.75, Temperature: -148.0, Gravity: 0.18, Orbit: 422k
Europa: Colony Cost: 5.75, Temperature: -148.0, Gravity: 0.13, Orbit: 671k
Ganymede: Colony Cost: 5.75, Temperature: -148.0, Gravity: 0.15, Orbit: 1.07m
Callisto: Colony Cost: 5.75, Temperature: -148.0, Gravity: 0.13, Orbit: 1.88m
Total Moons: 20
Saturn: Temperature: -178.0, Gravity: 0.74, Orbit: 1.43b
Titan: Colony Cost: 7.00, Temperature: -178.0, Gravity: 0.14, Orbit: 1.22m
Nitrogen 95%, Methane 5.0%, Pressure: 1.60
Total Moons: 28
Uranus: Temperature: -216.0, Gravity: 0.86, Orbit: 2.88b
Total Moons: 27
Neptune: Temperature: -228.0, Gravity: 1.10, Orbit: 4.5b
Total Moons: 13
Pluto: Temperature: -233.0, Gravity: 0.07, Orbit: 5.9b
Total Moons: 5
Quaoar: Temperature: -230.0, Gravity: 0.04, Orbit: 6.5b
Total Moons: 1
Orcus: Temperature: -233.0, Gravity: 0.03, Orbit: 7.2b
Total Moons: 1
Haumea: Temperature: -233.0, Gravity: 0.04, Orbit: 7.6b
Total Moons: 2
Makemake: Temperature: -238.0, Gravity: 0.04, Orbit: 7.8b
Sedna: Temperature: -248.0, Gravity: 0.04, Orbit: 11.4b
Eris: Temperature: -258.0, Gravity: 0.08, Orbit: 14.5b
Total Moons: 1
Asteroid Belt: 478
Alternatively, going to System view (F3), clicking Minerals tab, then at the bottom of it click Mineral Text, allows you to copy&paste this:
Rocky Planets: 12 Surveyed: 12
Gas Giants: 4 Surveyed: 4
Moons: 101 Surveyed: 109
Asteroids: 478 Surveyed: 478
Mercury
Duranium 985 611 Acc: 1
Corbomite 597 027 Acc: 0.8
Boronide 5 244 934 Acc: 1
Vendarite 4 501 630 Acc: 0.3
Uridium 4 299 939 Acc: 0.1
Corundium 4 714 309 Acc: 0.1
Gallicite 804 Acc: 0.1
Earth
Duranium 5 700 Acc: 0.15
Boronide 5 388 Acc: 0.15
Mercassium 14 710 Acc: 0.21
Uridium 82 049 Acc: 0.4
Gallicite 47 485 Acc: 0.28
Luna
Tritanium 705 233 Acc: 0.4
Boronide 430 142 Acc: 0.6
Sorium 1 633 030 Acc: 0.4
Gallicite 2 217 101 Acc: 0.3
Mars
Boronide 461 611 Acc: 0.1
Mercassium 11 096 980 Acc: 0.7
Uridium 7 397 644 Acc: 0.1
Corundium 610 730 Acc: 0.1
Phobos
Boronide 576 Acc: 1
Sorium 7 921 Acc: 1
Rhea
Tritanium 52 533 Acc: 0.6
Uridium 294 241 Acc: 0.6
Uranus
Sorium 242 896 700 Acc: 0.9
Neptune
Sorium 148 560 Acc: 1
Pluto
Boronide 447 213 Acc: 0.7
Orcus
Corundium 35 721 Acc: 1
Klotho
Boronide 2 116 Acc: 1
Angelina
Vendarite 9 801 Acc: 1
Lamberta
Duranium 2 592 Acc: 1
Boronide 9 216 Acc: 1
Corduba
Duranium 12 549 Acc: 1
Hippo
Vendarite 25 Acc: 1
Armida
Duranium 8 978 Acc: 1
Protogeneia
Vendarite 3 364 Acc: 1
Hecuba
Uridium 7 396 Acc: 1
Kythera
Corbomite 2 304 Acc: 1
Uridium 2 704 Acc: 1
Sylvia
Boronide 902 Acc: 1
Vibilia
Duranium 9 776 Acc: 0.98
Aneas
Neutronium 2 401 Acc: 1
Boronide 8 836 Acc: 1
Sorium 900 Acc: 1
Menelaus
Neutronium 4 761 Acc: 1
Boronide 729 Acc: 1
Nessus
Duranium 12 482 Acc: 1
Neutronium 1 369 Acc: 1
Mercassium 7 744 Acc: 1
Corundium 8 100 Acc: 1
Gallicite 8 836 Acc: 1
Amycus
Duranium 13 448 Acc: 1
Uridium 961 Acc: 1
2003 UZ413
Neutronium 45 026 Acc: 1
Sorium 22 219 Acc: 1
2003 MW12
Duranium 111 495 Acc: 1
Boronide 117 915 Acc: 0.9
1999 CD158
Boronide 216 Acc: 0.9
Mercassium 441 Acc: 0.9
1996 TR66
Duranium 6 272 Acc: 1
Vendarite 2 704 Acc: 1
Uridium 2 304 Acc: 1
2004 VN112
Boronide 12 Acc: 1
2001 KC77
Duranium 2 048 Acc: 1
Corbomite 2 025 Acc: 1
Wild
Neutronium 24 421 Acc: 0.5
Mercassium 39 959 Acc: 0.9
Gallicite 5 445 Acc: 0.8
Encke
Neutronium 34 226 Acc: 0.7
Tritanium 18 005 Acc: 0.5
Boronide 16 768 Acc: 0.6
Mercassium 21 783 Acc: 1
Vendarite 96 752 Acc: 0.9
Gallicite 15 627 Acc: 0.9
Schaumasse
Neutronium 17 007 Acc: 0.9
Mercassium 12 140 Acc: 0.8
Machholz
Duranium 69 160 Acc: 1
Vendarite 52 871 Acc: 1
Sorium 106 203 Acc: 0.9
Wolf-Harrington
Corbomite 35 897 Acc: 0.5
Tritanium 21 382 Acc: 1
Boronide 91 210 Acc: 0.9
Uridium 17 151 Acc: 0.9
Gallicite 20 785 Acc: 0.8
Reinmuth
Vendarite 19 961 Acc: 0.6
Sorium 57 344 Acc: 0.8
Stephan-Oterma
Duranium 41 472 Acc: 1
Corbomite 23 162 Acc: 0.9
Tritanium 75 971 Acc: 0.5
Vendarite 28 324 Acc: 0.9
Uridium 18 322 Acc: 0.6
Wolf
Boronide 54 464 Acc: 0.7
Uridium 18 053 Acc: 0.9
Comas Sola
Tritanium 6 829 Acc: 0.9
Borrelly
Duranium 68 003 Acc: 0.8
Boronide 8 067 Acc: 1
Uridium 28 975 Acc: 1
Corundium 27 952 Acc: 0.9
Gallicite 93 405 Acc: 0.8
Faye
Neutronium 23 141 Acc: 0.8
Corbomite 31 062 Acc: 0.5
Boronide 18 827 Acc: 0.9
Van Biesbroeck
Neutronium 24 631 Acc: 0.8
Chernykh
Duranium 37 864 Acc: 1
Corbomite 21 351 Acc: 0.8
Tritanium 29 258 Acc: 1
Mercassium 47 111 Acc: 0.9
Gallicite 17 258 Acc: 0.5
Tempel-Tuttle
Mercassium 14 115 Acc: 0.9
Neujmin
Tritanium 36 393 Acc: 0.6
Sorium 58 653 Acc: 1
Herschel-Rigollet
Sorium 39 775 Acc: 1
Swift-Tuttle
Duranium 48 386 Acc: 0.9
Uridium 74 571 Acc: 0.9
Halleys Comet
Mercassium 75 161 Acc: 0.8
Gallicite 37 000 Acc: 0.7
Ikeya-Zang
Gallicite 21 698 Acc: 0.8
Hale-Bopp
Neutronium 54 199 Acc: 0.7
Tritanium 83 264 Acc: 1
Uridium 5 789 Acc: 0.8
McNaught-Russell
Sorium 19 127 Acc: 1
To my knowledge, that is the most detailed information you can easily export from a game.