TRAPPIST-1e compared to Earth

Roughly Earth-sized planet in the habitable zone of the seven-planet TRAPPIST-1 system.

Can you see it?

As of 2026, no telescope can show this one; it is here to be understood, not spotted.

TRAPPIST-1e is roughly nine tenths as wide as Earth.

TRAPPIST-1e takes about 6.1 Earth days to go once round TRAPPIST-1.

TRAPPIST-1e has roughly two thirds the mass of Earth.

TRAPPIST-1e has roughly four fifths the volume of Earth.

Anything light from there tells us is news 40.66 years old.

Why it stands out: Seen from its surface, its neighbouring planets would at their closest look about as big in the sky as our Moon does from Earth.
What it is like: Roughly the size of the Earth and probably rocky: one of seven tightly packed planets around an ultra-cool red dwarf, and in its habitable zone.; How we know: The transit method: telescopes catch tiny repeating dips in starlight as each planet passes in front of the star.

The numbers

It belongs to TRAPPIST-1, 40.66 light-years away.