The name is of Arabic origin, the star's name comes from its location at the "left foot" of Orion. It is a contraction of Riǧl Ǧawza al-Yusra, this being Arabic for "Left Foot of the Central One".
Rigel is a star, not a planet. It is not certain who actually named it. Many cultures have other names for it.
The ancient Arabs.
Rigel is hot by "normal" stars but it is not the hottest, this distinction goes to a star named Cygnus OB2-12. See related questions.
Rigel is a triple star system.
The Rigel star is a star in the Orion constellation. Rigel is the brightest star in the Orion constellation, and it is the seventh brightest star seen in the night's sky.
We haven't detected any that I'm aware of.
Rigel is the brightest star in the constellation Orion
Rigel B is also a blue-white star but, unlike Rigel A, it is a main sequence star.
No. Proxima Centauri is the nearest star. Rigel is much further away.
Rigel by far.
Rigel is in the constellation Orion, not Centaurus. Please check your spelling and, if appropriate, resubmit.
Rigel is a star, not a planet, so it does not have a day.