Sign in or create your account

Enter your email and we'll send a 6-digit code — no password needed.
We only keep your email and the username you choose. We never share or sell your email, and we don't send marketing — we use it only to email you a sign-in code. Learn more.
Entering orbit…
Habitability
81/ 100
Highly Habitable

Crux 9

1

Water World

Life DetectedMagnetic FieldModerate Activity
Why is this a Water World?Your planet has abundant oxygen (41.2%) and hydrogen (17.6%), creating extensive water coverage while in the habitable temperature zone.
Water worlds have deep global oceans covering most or all of their surface. They form when planets have high water content and orbit in the habitable zone.
Classification Criteria:
✓ Oxygen: 41.2% + Hydrogen: 17.6% (water-forming elements)✓ Temperature: 285K (habitable range)✓ Distance: 1.10 AU (habitable zone)
Habitability ScoreHighly Habitable
81
Contributing Factors
water100
Abundant liquid water at surface temperature
geology90
Active geology recycles nutrients and drives carbon cycle
rotation30
Very slow rotation - extreme temperature swings between eternal day and night sides
Organic Chemistry84
Core organic elements (CHNO) present (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere60
Nitrogen-oxygen atmosphere - breathable and protective (partially stripped by slow rotation)
temperature100
Optimal temperature range for liquid water and life
magnetic Field100
Magnetic field provides radiation protection

Physical Properties

Mass
1.20x Earth (7.17e+24 kg)
Radius
1.06x Earth (6,770 km)
This planet: 1.06× Earth radiusEarth: 1× (baseline)
Surface Gravity
1.06x Earth (10.4 m/s²)
Surface Temperature
285 K (12 °C / 54 °F)
Rotation Period
20.0 hours/day (faster than Earth)
This planet: 20 h/dayEarth: 24 h/day

Orbital Environment

Star Type
G-type (Yellow (Sun-like))
Distance from Star
1.10 AU (165 million km)
Orbital Period
1.15 years

Atmosphere

Nitrogen and oxygen with water vapor, mild greenhouse effect

Elemental Composition

O - Oxygen
41.2%
H - Hydrogen
17.6%
N - Nitrogen
11.8%

Surface Characteristics

Vast oceans covering most of the surface, scattered islands or archipelagos

Closest Real Exoplanet

TOI-700 d82% similar
Orbiting TOI-700
YoursTOI-700 d
Mass1.20 × Earth1.25 × Earth
Radius1.30 × Earth1.07 × Earth
Density (composition)3.00 g/cm³5.62 g/cm³
Temperature285.2 K269.0 K
Starlight received0.83 × Earth0.85 × Earth
Star temperature5,600 K3,459 K
Discovered 2020 via transit · 101 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1rings2.0% - 2.8 radii

Inside the Roche limit (2.80 planet radii): torn apart into a ring system.

Moon 2stable0.012% - 8.8 radii

Small and distant: a quiet, stable companion.

Moon 3stable0.028% - 11.3 radii

Small and distant: a quiet, stable companion.

Moon 4stable0.016% - 27.8 radii

Small and distant: a quiet, stable companion.

+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry

Habitability

✓ Conditions suitable for life detectedThis planet exhibits the necessary conditions to support biological processes, including stable temperatures, liquid water, and protective magnetic fields.
Surface views from three worlds: rocky ground under a ringed sky, a cloud deck, and a lit desert

New: Stand on Your World 🏔️

Every planet you build can now be seen from the ground. The terrain, the color of the sky, the weather and what hangs overhead are all read from the same numbers that shape the globe — so a thin-aired world gives you sunlit rock under a near-black sky crowded with stars, a runaway greenhouse seals you under an unbroken sulfur lid, and a gas giant leaves you in the cloud tops with nothing solid beneath you at all. If one of your moons wandered inside the Roche limit, what is left of it arcs overhead as rings.

Sign in or create your account

Enter your email and we'll send a 6-digit code — no password needed.
We only keep your email and the username you choose. We never share or sell your email, and we don't send marketing — we use it only to email you a sign-in code. Learn more.

Send feedback

We're still building out the best experience we can — and we'd love your input. Tell us about features you enjoy, ideas you'd like to see, or pain points where something feels off, and we'll know where to look next.

Type