Proxima centauri is closest to earth,but its a very, faint,red star, so its invisible to the naked eye.Alpha centauri is the closest,visible star.
Proxima centauri(Latin proximus, -a, -um: meaning 'next to' or 'nearest to') is closest to earth & a dim red dwarf star that cannot even be seen without a telescope. Alpha Centauri is the second closest star, nearly as close as Proxima, and is almost identical to the Sun. It is one of the brightest stars in the Earth's night sky but is not ever visible from north of the tropics.
Proxima centauri is closest to earth
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