Exoplanet scatter and hexbin
Ten worlds / one familiar reference
What makes another world different from home? Meet ten planets through two clues: their size and the starlight they receive. Start with one, then compare it with Earth.
Meet the featured worlds
A selection of contrasts, not a ranking of habitability. Choose a world on the chart or a card below.
10 of 10 featured worlds available + Earth as a reference
10 of 10 featured worlds available plus Earth as a reference
Size and starlight
○ Other worlds ◆ Earth
Left means less starlight. Higher means a larger planet. Earth sits where both measures equal 1.
The axes use logarithmic scales to fit very different worlds. Point size is constant. Starlight measures incoming energy, not surface temperature.
Your selected world
TRAPPIST-1 e and Earth
A smaller world for comparison. Its radius is 0.92 times Earth's and it receives 0.646 times Earth's starlight.
Circles compare physical size on the same scale. They are diagrams, not photographs.
| Measure | TRAPPIST-1 e | Earth |
|---|---|---|
| Radius | 0.92 × EarthReported uncertainty: -0.012 / +0.013 | 1 |
| Received starlight | 0.646 × EarthReported uncertainty: -0.025 / +0.025 | 1 |
| Year length | 6.101 days | 365.25 days |
| Distance from us | 40.54 light-years | Home |
Earth's radius and received starlight are normalized to 1. A light-year is a unit of distance.
What we know
NASA reports this world around TRAPPIST-1, discovered in 2017 using transit. The comparison uses published measurements and archive estimates.
Read the measurements and sources at NASA (opens in a new tab)What these clues cannot tell us
Received starlight is not surface temperature. These measurements alone do not establish an atmosphere, liquid surface water or life. Similarity to Earth on this chart is not evidence of habitability.