The ultracool dwarf star TRAPPIST-1 in the constellation of Aqua

The ultracool dwarf star TRAPPIST-1 in the constellation of Aquarius. This chart shows the naked eye stars visible on a clear dark night in the sprawling constellation of Aquarius (The Water Carrier). The position of the faint and very red ultracool dwarf star TRAPPIST-1 is marked. Although it is relatively close to the Sun, it is very faint and not visible in small telescopes. Credit: ESO/IAU and Sky & Telescope

The ultracool dwarf star TRAPPIST-1 in the constellation of Aquarius. This chart shows the naked eye stars visible on a clear dark night in the sprawling constellation of Aquarius (The Water Carrier). The position of the faint and very red ultracool dwarf star TRAPPIST-1 is marked. Although it is relatively close to the Sun, it is very faint and not visible in small telescopes.

Credit:
ESO/IAU and Sky & Telescope

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