It is only 25% of the mass of the Earth and is probably not habitable.
The new planet is the third planet discovered in its planetary system.
It is called Proxima d and its neighboring planets are called Proxima b and Proxima c.
Proxima b was first spotted in 2016 and finally confirmed in 2020.
The discovery of Proxima d could indicate that there are many more planets to be found in this region.
We could be looking at a system similar to our own solar system.
The planets orbit a star called Proxima Centauri.
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