Complete world information

Earth

A water-rich rocky world with a dynamic atmosphere, active geology and extreme cultural variety.

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Scientific status

No exoplanet is confirmed habitable or inhabited. Habitable-zone position only means that liquid surface water could be possible under the right atmospheric conditions. Rate the Earth percentages are editorial comparison scores, not scientific probabilities.

Rate the Earth habitability percentages are editorial comparison scores, not scientific proof of habitability or life.
NASA Johnson Space CenterApollo-era Earth photograph
Rate the Earth habitability comparison100%
Confirmed inhabited benchmark
Probability of other life100%
Confirmed biosphere
Distance modelCurrent location

You are already on Earth. No interplanetary transfer is required.

One-way light time0 seconds

Minimum delay for information travelling at light speed.

Round-trip communication0 seconds

Approximate send-and-reply delay before processing time.

Real mission comparisonAlready here

Current human location

Host systemSolar SystemOpen the complete star-system information page →

Life potential

Could other life exist on Earth?

Earth is the only world in this catalog with confirmed life, persistent liquid surface water and an observed global biosphere.

Editorial probability of other life100%
Confirmed biosphere

Why this score?

  • Surface liquid water is abundant and persistent.
  • The atmosphere supports complex chemistry and biology.
  • A magnetic field and active geology support long-term environmental stability.

This score reflects confirmed life, not merely estimated habitability.

Complete data sheet

Everything listed for Earth

Measured values, estimates, discovery information and the main uncertainties are shown together below.

WorldEarth
ClassificationPublic world review
Host systemSolar System
Host starG-type Sun
Distance from EarthCurrent location
Radius1.00 × Earth
Mass1.00 × Earth
Gravity1.00 g
AtmosphereNitrogen and oxygen
TemperatureApprox. 14.9 °C
Orbital period365.25 days
Discovery yearKnown since prehistory
Discovery methodDirect observation
Habitability statusConfirmed inhabited benchmark
Candidate classificationNot treated as a leading surface-habitability candidate
Image statusResolved mission or telescope imagery is available
Surface waterAbundant liquid oceans
BiosphereGlobal and diverse
Travel statusCurrently occupied
Known residents8+ billion humans

Travel calculation

How long would the journey take?

Straight-line arithmetic is compared with real mission history. Actual trajectories depend on orbital mechanics, acceleration, braking, launch windows and gravity assists.

Current locationAlready hereNo spacecraft required

Earth is the user's present reference location.

Research guide

What we know, and what we do not know

What is directly known

This body has been observed as a resolved object. Spacecraft and telescopes provide real imagery and direct measurements, although conditions can still vary by location and time.

What remains unknown

Local weather, geology and mission conditions can change, but the body's global size, orbit and broad environment are directly measured.

Environment

Earth supports stable surface liquid water, a protective magnetic field and a breathable atmosphere.

Why it matters

Earth is the only confirmed inhabited planet and the benchmark used for every comparison on this site.

Limitations

Climate, infrastructure, safety and quality of life vary sharply by region.

Primary catalog source: NASA Science