Science
TRAPPIST-1 Exoplanets Solar System Comparison – Exoplanet Exploration: Planets Beyond our Solar System – NASA Exoplanet Exploration and Discovery
A planet’s density is determined by its composition as well as its size: Gravity compresses the material a planet is made of, increasing the planet’s density. Uncompressed…
This graph presents measured properties of the seven TRAPPIST-1 exoplanets (labeled b through h), showing how they stack up with one another as well as with Earth and the other inner rocky worlds in our own solar system. The relative sizes of the planets are indicated by the circles. All of the known TRAPPIST-1 planets are larger than Mars, with five of them within 15% of the diameter of Earth.
The vertical axis shows the uncompressed densities of the planets. Density, calculated from a planet’s…
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