Roughly 125 light years.
There are many celestial bodies or stars, that can be found in the constellation Leo. The for with the brightest magnitude are Regulus, Leonis, Beta Leonis, and Gamma Leonis.
There are four major stars that make Leo show up brightly in the sky: Regulus (Alpha Leonis), Beta Leonis (Denebola), Algieba (Gamma Leonis), and Delta Leonis (Zosma).
There are 92 stars in the constellation which appear in the Bayer/Flamsteed catalogues. Among the brighter stars are:Regulus (Alpha Leonis),Denebola (Beta Leonis),Algieba (Gamma Leonis),Zosma (Delta Leonis),Adhafera (Zeta Leonis),Other named stars in Leo areAl Ras al Asad al Shamaliyy (Mu Leonis) and Chertan (Theta Leonis).
Delta Leonis (Zosma) is approximately 57.7 light years from us.
Gamma Leonis (γ Leo, γ Leonis) (Algieba or Al Gieba) (a binary star system) is the second brightest star in the constellation Leo.
The constellation of Leo contains the main sequence star, Regulus(Alpha Leonis), as well as Beta Leonis, Gamma Leonis, Delta Leonis, Zeta Leonis, Iota Leonis and Tau Leonis. Additional stars include Mu Leonis, Theta Leonis, red giant R Leonis, Wolf 359, Gliese 359, CW Leo, Caffau's Star. Leo also contains the Leo Ring, a group of large quasar groups and several galaxies including Messier 65, Messier 66, Messier 95, Messier 96, Messier 105 and NGC3628.
The constellation Leo is the 12th largest constellation in the sky and covers 947 square degrees. The stars in Leo include; Alpha Leonis, Beta Leonis, Gamma Leonis, Theta Leonis, Delta Leonis, Kappa Leonis, Lambda Leonis and Omicron Leonis. The brightest star is Alpha Leonis.
The binary star Gamma Leonis (Algieba, the forehead) is about 126 light-years from Earth.
If you are referring to Gamma Velorum (and a bunch of other variants), it is a binary star system (pulsar) about 800 light years away.
The three most significant stars in Leo the Lion are : Alpha Leonis or Regulus (the Lion's heart) with an apparent magnitude of 1.35, Beta Leonis or Denebola (the Lion's tail) with an apparent magnitude of 2.14 and Gamma Leonis or Algieba (where the Lion's mane meets his body) with an apparent magnitude of 1.98
The three brightest stars in Leo the Lion are : Alpha Leonis or Regulus (the Lion's heart) with an apparent magnitude of 1.35, Beta Leonis or Denebola (the Lion's tail) with an apparent magnitude of 2.14 and Gamma Leonis or Algieba (where the Lion's mane meets his body) with an apparent magnitude of 1.98 Hope that helps!
No... No matter how far away the radioactivity will always be the Same and have the same effect