Star system

G 87-16︎

Economy
Agriculture / Refinery
Government
Dictatorship
Allegiance
Independent
Star type
Class K star Scoopable
Coordinates
5.91 / 15.69 / -57.5
Permit required
No

  • ︎ G 87-16 A - Class K star

    Body distance
    -

    Solar masses
    0.7656
    Solar radius
    0.8529

    • ︎ G 87-16 A 1 - Icy body Landable

      Body distance
      10 Ls

      Earth masses
      23.7631
      Radius
      20,601 km
      Gravity
      2.28 g
      Surface temperature
      772 K (499°C/929°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      ︎ Ruthenium: 1.0%︎ Tin: 1.0%︎ Tungsten: 0.9%︎ Chromium: 7.2%︎ Zinc: 4.4%︎ Zirconium: 1.9%︎ Carbon: 19.6%︎ Iron: 16.0%︎ Nickel: 12.1%︎ Phosphorus: 12.6%︎ Sulphur: 23.3%

    • ︎ G 87-16 A 2 - Class Y star (brown dwarf)

      Body distance
      2,923 Ls

      Solar masses
      0.0195
      Solar radius
      0.0888

    • ︎ G 87-16 A 2 a - Icy body

      Body distance
      2,981 Ls

      Earth masses
      0.7965
      Radius
      7,725 km
      Gravity
      0.54 g
      Surface temperature
      66 K (-208°C/-342°F)
      Surface pressure
      0.84 atm
      Volcanism
      Atmosphere
      Argon-rich
      Terraforming

  • ︎ G 87-16 B - Class M star

    Body distance
    21,686 Ls

    Solar masses
    0.3008
    Solar radius
    0.4563

    • ︎ G 87-16 B 9 - Class I gas giant

      Body distance
      20,727 Ls
      Ring/belt type
      Icy (Common)
      Rocky (Common)

      Earth masses
      190.6770
      Radius
      64,937 km
      Gravity
      1.84 g
      Surface temperature
      83 K (-191°C/-311°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ G 87-16 B 9 d - Icy body Landable

        Body distance
        20,474 Ls

        Earth masses
        0.0083
        Radius
        1,773 km
        Gravity
        0.11 g
        Surface temperature
        58 K (-215°C/-355°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Antimony: 0.8%︎ Cadmium: 1.0%︎ Tin: 0.8%︎ Germanium: 3.6%︎ Zinc: 3.4%︎ Zirconium: 1.5%︎ Carbon: 23.7%︎ Iron: 12.5%︎ Nickel: 9.5%︎ Phosphorus: 15.2%︎ Sulphur: 28.1%

      • ︎ G 87-16 B 9 c - Icy body Landable

        Body distance
        20,508 Ls

        Earth masses
        0.0067
        Radius
        1,651 km
        Gravity
        0.10 g
        Surface temperature
        59 K (-214°C/-353°F)
        Surface pressure
        0.00 atm
        Volcanism
        Minor Ammonia magma
        Atmosphere
        Terraforming

        ︎ Selenium: 4.2%︎ Yttrium: 0.7%︎ Molybdenum: 0.8%︎ Tin: 0.7%︎ Chromium: 5.4%︎ Zinc: 3.3%︎ Carbon: 22.6%︎ Iron: 12.0%︎ Nickel: 9.1%︎ Phosphorus: 14.5%︎ Sulphur: 26.9%

      • ︎ G 87-16 B 9 a - Icy body

        Body distance
        20,542 Ls

        Earth masses
        0.0013
        Radius
        951 km
        Gravity
        0.06 g
        Surface temperature
        165 K (-108°C/-163°F)
        Surface pressure
        15.13 atm
        Volcanism
        Major Water geysers
        Atmosphere
        Thick Methane
        Terraforming

      • ︎ G 87-16 B 9 b - Icy body Landable

        Body distance
        23,220 Ls

        Earth masses
        0.0022
        Radius
        1,153 km
        Gravity
        0.07 g
        Surface temperature
        61 K (-213°C/-351°F)
        Surface pressure
        0.00 atm
        Volcanism
        Major Water geysers
        Atmosphere
        Terraforming

        ︎ Ruthenium: 0.8%︎ Cadmium: 1.0%︎ Mercury: 0.5%︎ Arsenic: 1.6%︎ Germanium: 3.7%︎ Vanadium: 3.1%︎ Carbon: 23.8%︎ Iron: 12.6%︎ Nickel: 9.5%︎ Phosphorus: 15.2%︎ Sulphur: 28.2%

    • ︎ G 87-16 B 8 - Class I gas giant

      Body distance
      20,818 Ls
      Ring/belt type
      Icy (Common)

      Earth masses
      88.7818
      Radius
      54,090 km
      Gravity
      1.23 g
      Surface temperature
      76 K (-197°C/-322°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ G 87-16 B 8 d - Icy body

        Body distance
        20,504 Ls
        Ring/belt type
        Icy (Common)

        Earth masses
        0.0817
        Radius
        3,780 km
        Gravity
        0.23 g
        Surface temperature
        87 K (-186°C/-302°F)
        Surface pressure
        2.82 atm
        Volcanism
        Atmosphere
        Methane-rich
        Terraforming

      • ︎ G 87-16 B 8 a - Icy body

        Body distance
        20,514 Ls

        Earth masses
        0.0021
        Radius
        1,136 km
        Gravity
        0.07 g
        Surface temperature
        179 K (-94°C/-138°F)
        Surface pressure
        21.79 atm
        Volcanism
        Major Water geysers
        Atmosphere
        Thick Methane
        Terraforming

      • ︎ G 87-16 B 8 c - Icy body

        Body distance
        20,521 Ls

        Earth masses
        0.0009
        Radius
        843 km
        Gravity
        0.05 g
        Surface temperature
        158 K (-115°C/-176°F)
        Surface pressure
        8.99 atm
        Volcanism
        Atmosphere
        Thick Methane
        Terraforming

      • ︎ G 87-16 B 8 b - Icy body

        Body distance
        20,566 Ls

        Earth masses
        0.0007
        Radius
        781 km
        Gravity
        0.05 g
        Surface temperature
        161 K (-112°C/-170°F)
        Surface pressure
        10.13 atm
        Volcanism
        Major Water geysers
        Atmosphere
        Thick Methane
        Terraforming

    • ︎ G 87-16 B 10 - Class I gas giant

      Body distance
      21,057 Ls
      Ring/belt type
      Icy (Common)
      Rocky (Common)

      Earth masses
      116.7010
      Radius
      60,747 km
      Gravity
      1.28 g
      Surface temperature
      73 K (-200°C/-328°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ G 87-16 B 10 c - Icy body Landable

        Body distance
        20,345 Ls

        Earth masses
        0.0016
        Radius
        1,028 km
        Gravity
        0.06 g
        Surface temperature
        57 K (-216°C/-356°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Ruthenium: 0.7%︎ Cadmium: 0.9%︎ Molybdenum: 0.8%︎ Chromium: 5.4%︎ Germanium: 3.5%︎ Vanadium: 3.0%︎ Carbon: 22.8%︎ Iron: 12.1%︎ Nickel: 9.1%︎ Phosphorus: 14.6%︎ Sulphur: 27.1%

      • ︎ G 87-16 B 10 a - Icy body Landable

        Body distance
        20,427 Ls

        Earth masses
        0.0016
        Radius
        1,020 km
        Gravity
        0.06 g
        Surface temperature
        58 K (-215°C/-356°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Selenium: 4.2%︎ Yttrium: 0.7%︎ Mercury: 0.5%︎ Tin: 0.7%︎ Germanium: 3.5%︎ Manganese: 5.0%︎ Carbon: 22.6%︎ Iron: 12.1%︎ Nickel: 9.2%︎ Phosphorus: 14.5%︎ Sulphur: 26.9%

      • ︎ G 87-16 B 10 b - Icy body Landable

        Body distance
        20,533 Ls

        Earth masses
        0.0007
        Radius
        767 km
        Gravity
        0.04 g
        Surface temperature
        58 K (-216°C/-356°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Polonium: 0.3%︎ Cadmium: 0.9%︎ Molybdenum: 0.8%︎ Chromium: 5.4%︎ Germanium: 3.5%︎ Zinc: 3.3%︎ Carbon: 22.8%︎ Iron: 12.1%︎ Nickel: 9.1%︎ Phosphorus: 14.6%︎ Sulphur: 27.1%

    • ︎ G 87-16 B 6 - Class I gas giant

      Body distance
      21,441 Ls
      Ring/belt type
      Icy (Common)
      Metal rich (Common)

      Earth masses
      17.6903
      Radius
      36,171 km
      Gravity
      0.55 g
      Surface temperature
      113 K (-161°C/-257°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ G 87-16 B 6 a - Icy body Landable

        Body distance
        21,322 Ls

        Earth masses
        0.0005
        Radius
        675 km
        Gravity
        0.05 g
        Surface temperature
        101 K (-172°C/-278°F)
        Surface pressure
        0.00 atm
        Volcanism
        Major Water geysers
        Atmosphere
        Terraforming

        ︎ Yttrium: 0.9%︎ Mercury: 0.6%︎ Tin: 0.9%︎ Arsenic: 1.9%︎ Manganese: 5.9%︎ Vanadium: 3.5%︎ Carbon: 21.6%︎ Iron: 14.4%︎ Nickel: 10.9%︎ Phosphorus: 13.8%︎ Sulphur: 25.7%

      • ︎ G 87-16 B 6 c - Icy body Landable

        Body distance
        21,342 Ls

        Earth masses
        0.0006
        Radius
        705 km
        Gravity
        0.05 g
        Surface temperature
        101 K (-172°C/-278°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Selenium: 4.0%︎ Yttrium: 0.8%︎ Molybdenum: 0.9%︎ Tungsten: 0.8%︎ Germanium: 4.1%︎ Zinc: 3.8%︎ Carbon: 21.5%︎ Iron: 14.1%︎ Nickel: 10.7%︎ Phosphorus: 13.7%︎ Sulphur: 25.5%

      • ︎ G 87-16 B 6 b - Icy body Landable

        Body distance
        21,348 Ls

        Earth masses
        0.0009
        Radius
        806 km
        Gravity
        0.05 g
        Surface temperature
        101 K (-172°C/-278°F)
        Surface pressure
        0.00 atm
        Volcanism
        Minor Carbon dioxide geysers
        Atmosphere
        Terraforming

        ︎ Yttrium: 0.8%︎ Mercury: 0.6%︎ Molybdenum: 0.9%︎ Chromium: 6.1%︎ Manganese: 5.6%︎ Zinc: 3.7%︎ Carbon: 20.6%︎ Iron: 13.6%︎ Nickel: 10.3%︎ Phosphorus: 13.2%︎ Sulphur: 24.6%

    • ︎ G 87-16 B 5 - High metal content world

      Body distance
      21,571 Ls

      Earth masses
      4.2895
      Radius
      9,231 km
      Gravity
      2.05 g
      Surface temperature
      429 K (156°C/312°F)
      Surface pressure
      57.82 atm
      Volcanism
      Major Silicate vapour geysers
      Atmosphere
      Thick Methane-rich
      Terraforming

    • ︎ G 87-16 B 4 - Earth-like world

      Body distance
      21,627 Ls

      Earth masses
      1.1420
      Radius
      6,333 km
      Gravity
      1.16 g
      Surface temperature
      303 K (30°C/85°F)
      Surface pressure
      2.31 atm
      Volcanism
      Major Rocky magma
      Atmosphere
      Suitable for water-based life
      Terraforming
      Terraformed

    • ︎ G 87-16 B 2 - High metal content world Landable

      Body distance
      21,629 Ls

      Earth masses
      0.0185
      Radius
      1,728 km
      Gravity
      0.25 g
      Surface temperature
      383 K (109°C/229°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      ︎ Technetium: 0.8%︎ Mercury: 0.9%︎ Tungsten: 1.2%︎ Chromium: 9.6%︎ Germanium: 4.5%︎ Manganese: 8.8%︎ Carbon: 12.9%︎ Iron: 21.4%︎ Nickel: 16.2%︎ Phosphorus: 8.3%︎ Sulphur: 15.3%

    • ︎ G 87-16 B 1 - High metal content world Landable

      Body distance
      21,671 Ls

      Earth masses
      0.0009
      Radius
      632 km
      Gravity
      0.09 g
      Surface temperature
      506 K (233°C/451°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      ︎ Ruthenium: 1.4%︎ Molybdenum: 1.4%︎ Niobium: 1.5%︎ Chromium: 9.9%︎ Germanium: 4.6%︎ Vanadium: 5.4%︎ Carbon: 13.2%︎ Iron: 21.9%︎ Nickel: 16.6%︎ Phosphorus: 8.4%︎ Sulphur: 15.7%

    • ︎ G 87-16 B 3 - High metal content world Landable

      Body distance
      21,696 Ls

      Earth masses
      0.0407
      Radius
      2,220 km
      Gravity
      0.34 g
      Surface temperature
      291 K (18°C/64°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      ︎ Yttrium: 1.3%︎ Cadmium: 1.6%︎ Molybdenum: 1.4%︎ Chromium: 9.4%︎ Manganese: 8.7%︎ Zinc: 5.7%︎ Carbon: 12.4%︎ Iron: 21.0%︎ Nickel: 15.9%︎ Phosphorus: 7.9%︎ Sulphur: 14.7%

      • ︎ G 87-16 B 3 a - Rocky body Landable

        Body distance
        21,684 Ls

        Earth masses
        0.0043
        Radius
        1,127 km
        Gravity
        0.14 g
        Surface temperature
        291 K (18°C/64°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Yttrium: 1.2%︎ Cadmium: 1.6%︎ Mercury: 0.9%︎ Arsenic: 2.4%︎ Manganese: 8.4%︎ Zinc: 5.6%︎ Carbon: 15.5%︎ Iron: 20.5%︎ Nickel: 15.5%︎ Phosphorus: 9.9%︎ Sulphur: 18.5%

    • ︎ G 87-16 B 7 - Class I gas giant

      Body distance
      22,213 Ls
      Ring/belt type
      Icy (Common)

      Earth masses
      17.0166
      Radius
      32,409 km
      Gravity
      0.66 g
      Surface temperature
      98 K (-175°C/-284°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ G 87-16 B 7 c - Icy body Landable

        Body distance
        21,238 Ls

        Earth masses
        0.0010
        Radius
        889 km
        Gravity
        0.05 g
        Surface temperature
        88 K (-186°C/-302°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Polonium: 0.3%︎ Selenium: 4.3%︎ Cadmium: 1.0%︎ Tin: 0.7%︎ Arsenic: 1.6%︎ Manganese: 5.1%︎ Carbon: 23.2%︎ Iron: 12.2%︎ Nickel: 9.3%︎ Phosphorus: 14.8%︎ Sulphur: 27.6%

      • ︎ G 87-16 B 7 b - Icy body Landable

        Body distance
        21,244 Ls

        Earth masses
        0.0002
        Radius
        537 km
        Gravity
        0.03 g
        Surface temperature
        88 K (-186°C/-302°F)
        Surface pressure
        0.00 atm
        Volcanism
        Water geysers
        Atmosphere
        Terraforming

        ︎ Yttrium: 0.7%︎ Cadmium: 1.0%︎ Tin: 0.7%︎ Arsenic: 1.6%︎ Manganese: 5.1%︎ Vanadium: 3.0%︎ Carbon: 23.4%︎ Iron: 12.3%︎ Nickel: 9.3%︎ Phosphorus: 15.0%︎ Sulphur: 27.8%

      • ︎ G 87-16 B 7 e - Icy body Landable

        Body distance
        21,272 Ls

        Earth masses
        0.0002
        Radius
        538 km
        Gravity
        0.03 g
        Surface temperature
        87 K (-186°C/-302°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Selenium: 4.1%︎ Yttrium: 0.7%︎ Niobium: 0.8%︎ Tungsten: 0.6%︎ Chromium: 5.3%︎ Manganese: 4.9%︎ Carbon: 22.2%︎ Iron: 11.7%︎ Nickel: 8.9%︎ Phosphorus: 14.2%︎ Sulphur: 26.5%

      • ︎ G 87-16 B 7 d - Icy body Landable

        Body distance
        21,290 Ls

        Earth masses
        0.0002
        Radius
        504 km
        Gravity
        0.03 g
        Surface temperature
        88 K (-186°C/-302°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Selenium: 4.3%︎ Tellurium: 0.9%︎ Cadmium: 0.9%︎ Tin: 0.7%︎ Chromium: 5.5%︎ Zirconium: 1.4%︎ Carbon: 23.0%︎ Iron: 12.1%︎ Nickel: 9.2%︎ Phosphorus: 14.7%︎ Sulphur: 27.3%

      • ︎ G 87-16 B 7 a - Icy body Landable

        Body distance
        21,445 Ls

        Earth masses
        0.0003
        Radius
        610 km
        Gravity
        0.04 g
        Surface temperature
        88 K (-186°C/-302°F)
        Surface pressure
        0.00 atm
        Volcanism
        Major Water geysers
        Atmosphere
        Terraforming

        ︎ Antimony: 0.8%︎ Selenium: 4.4%︎ Mercury: 0.5%︎ Molybdenum: 0.8%︎ Germanium: 3.6%︎ Zirconium: 1.5%︎ Carbon: 23.5%︎ Iron: 12.6%︎ Nickel: 9.5%︎ Phosphorus: 15.0%︎ Sulphur: 27.9%

    • ︎ G 87-16 B 11 - Class I gas giant

      Body distance
      22,695 Ls

      Earth masses
      170.4680
      Radius
      63,841 km
      Gravity
      1.70 g
      Surface temperature
      73 K (-200°C/-327°F)
      Surface pressure
      0.00 atm
      Volcanism
      Atmosphere
      Terraforming

      • ︎ G 87-16 B 11 b - Icy body Landable

        Body distance
        22,695 Ls

        Earth masses
        0.0058
        Radius
        1,574 km
        Gravity
        0.09 g
        Surface temperature
        53 K (-220°C/-363°F)
        Surface pressure
        0.00 atm
        Volcanism
        Minor Carbon dioxide geysers
        Atmosphere
        Terraforming

        ︎ Antimony: 0.8%︎ Selenium: 4.4%︎ Tin: 0.7%︎ Tungsten: 0.7%︎ Arsenic: 1.6%︎ Germanium: 3.6%︎ Carbon: 23.5%︎ Iron: 12.4%︎ Nickel: 9.4%︎ Phosphorus: 15.0%︎ Sulphur: 27.9%

      • ︎ G 87-16 B 11 e - Icy body Landable

        Body distance
        22,752 Ls

        Earth masses
        0.0050
        Radius
        1,502 km
        Gravity
        0.09 g
        Surface temperature
        52 K (-221°C/-366°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Selenium: 4.2%︎ Technetium: 0.4%︎ Molybdenum: 0.8%︎ Niobium: 0.8%︎ Manganese: 5.0%︎ Zinc: 3.3%︎ Carbon: 22.7%︎ Iron: 12.0%︎ Nickel: 9.1%︎ Phosphorus: 14.6%︎ Sulphur: 27.0%

      • ︎ G 87-16 B 11 d a - Icy body Landable

        Body distance
        22,808 Ls

        Earth masses
        0.0004
        Radius
        691 km
        Gravity
        0.04 g
        Surface temperature
        52 K (-221°C/-366°F)
        Surface pressure
        0.00 atm
        Volcanism
        Major Water geysers
        Atmosphere
        Terraforming

        ︎ Antimony: 0.6%︎ Selenium: 4.7%︎ Niobium: 0.6%︎ Tin: 0.5%︎ Chromium: 4.1%︎ Zinc: 2.5%︎ Carbon: 25.1%︎ Iron: 9.1%︎ Nickel: 6.9%︎ Phosphorus: 16.1%︎ Sulphur: 29.8%

      • ︎ G 87-16 B 11 c - Icy body Landable

        Body distance
        22,816 Ls

        Earth masses
        0.0144
        Radius
        2,126 km
        Gravity
        0.13 g
        Surface temperature
        53 K (-220°C/-365°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Yttrium: 0.7%︎ Cadmium: 0.9%︎ Molybdenum: 0.8%︎ Germanium: 3.5%︎ Manganese: 5.0%︎ Zinc: 3.3%︎ Carbon: 22.8%︎ Iron: 12.1%︎ Nickel: 9.2%︎ Phosphorus: 14.6%︎ Sulphur: 27.1%

      • ︎ G 87-16 B 11 c a - Icy body Landable

        Body distance
        23,181 Ls

        Earth masses
        0.0004
        Radius
        688 km
        Gravity
        0.04 g
        Surface temperature
        53 K (-220°C/-365°F)
        Surface pressure
        0.00 atm
        Volcanism
        Water geysers
        Atmosphere
        Terraforming

        ︎ Antimony: 0.6%︎ Selenium: 4.6%︎ Cadmium: 0.7%︎ Molybdenum: 0.6%︎ Germanium: 3.0%︎ Manganese: 3.8%︎ Carbon: 25.0%︎ Iron: 9.1%︎ Nickel: 6.9%︎ Phosphorus: 16.0%︎ Sulphur: 29.7%

      • ︎ G 87-16 B 11 d - Icy body Landable

        Body distance
        23,344 Ls

        Earth masses
        0.0068
        Radius
        1,662 km
        Gravity
        0.10 g
        Surface temperature
        52 K (-221°C/-366°F)
        Surface pressure
        0.00 atm
        Volcanism
        Atmosphere
        Terraforming

        ︎ Antimony: 0.7%︎ Niobium: 0.8%︎ Tin: 0.7%︎ Chromium: 5.5%︎ Manganese: 5.0%︎ Zirconium: 1.4%︎ Carbon: 22.7%︎ Iron: 12.2%︎ Nickel: 9.2%︎ Phosphorus: 14.6%︎ Sulphur: 27.0%

      • ︎ G 87-16 B 11 a - Icy body Landable

        Body distance
        24,006 Ls

        Earth masses
        0.0203
        Radius
        2,378 km
        Gravity
        0.15 g
        Surface temperature
        54 K (-219°C/-362°F)
        Surface pressure
        0.00 atm
        Volcanism
        Major Water geysers
        Atmosphere
        Terraforming

        ︎ Yttrium: 0.7%︎ Molybdenum: 0.8%︎ Niobium: 0.8%︎ Germanium: 3.6%︎ Manganese: 5.1%︎ Zirconium: 1.4%︎ Carbon: 23.3%︎ Iron: 12.3%︎ Nickel: 9.3%︎ Phosphorus: 14.9%︎ Sulphur: 27.7%

    • ︎ G 87-16 B 12 - Icy body

      Body distance
      22,734 Ls

      Earth masses
      7.9414
      Radius
      13,987 km
      Gravity
      1.65 g
      Surface temperature
      52 K (-221°C/-366°F)
      Surface pressure
      1.41 atm
      Volcanism
      Water geysers
      Atmosphere
      Helium
      Terraforming