As always the case, what we see is not always true.
Alpha Cenauri is in fact a triple star system, comparison not surprising a, b, and c stars.
Technically speaking, the sun is the closest star to Earth..The next closest known star to the Earth is Proxima Centauri, red dwarf starapproximately 4.2 light years from Earth ... only about 278,000 times as farfrom us as the Sun is. See the related link below for further information aboutProxima Centauri..The next two closest known stars comprise the binary star system called AlphaCentauri. Alpha Centauri is 4.4 light years from Earth..It is postulated that another star, a red or brown dwarf star, closer to the Earththan Proxima Centauri, orbits the sun in a highly elliptical orbit. This possiblestar is code named Nemesis. See the related link below for further informationabout a companion star.That would be the Sun, an average everyday star. The next closest star to earth is Alpha Centauri, which is only four light-years away.
White dwarf
It may be either. Juvenile means young.
The Sun is a medium mass star in main sequence.
red
Alpha Centauri is a triple star in the Centaurus constellation, the fifth brightest star from Earth's view, and the closest star to Earth, besides the sun. Alpha Centauri's coordinates are 14h 39m 36.4951s, −60° 50′ 02.308″.
It's the brightest star in the constellation Centaurus. Star names are assigned based on the genitive form of the name of the constellation they're in, with the brighter stars (usually) being given low Greek letter names.
Proximus Centauri has a very low average luminosity. It is also a flare star that undergoes random increases in brightness because of magnetic activity which gives the impression of flickering. Because of it's low energy production, Proximus Centauri is expected to be around for another four trillion years.
Vega has about 2.1 times the mass of the Sun. That's a fairly large mass; but you'll have to choose where you set the limit between "medium-mass" and "high-mass"! It is definitely not "low-mass"; in general, low-mass stars, i.e. red dwarves, can't be seen with the naked eye, even if they are in our immediate neighborhood. (The very closest star after the Sun is Proxima Centauri, and it can't be seen with the naked eye.) The main definition of a high mass star is a star that can eventually explode as a supernova. For that the star needs to be around at least 8 times the Sun's mass. I would say Vega is best thought of as "medium mass".
Technically speaking, the sun is the closest star to Earth..The next closest known star to the Earth is Proxima Centauri, red dwarf starapproximately 4.2 light years from Earth ... only about 278,000 times as farfrom us as the Sun is. See the related link below for further information aboutProxima Centauri..The next two closest known stars comprise the binary star system called AlphaCentauri. Alpha Centauri is 4.4 light years from Earth..It is postulated that another star, a red or brown dwarf star, closer to the Earththan Proxima Centauri, orbits the sun in a highly elliptical orbit. This possiblestar is code named Nemesis. See the related link below for further informationabout a companion star.That would be the Sun, an average everyday star. The next closest star to earth is Alpha Centauri, which is only four light-years away.
Vega has about 2.1 times the mass of the Sun. That's a fairly large mass; but you'll have to choose where you set the limit between "medium-mass" and "high-mass"! It is definitely not "low-mass"; in general, low-mass stars, i.e. red dwarves, can't be seen with the naked eye, even if they are in our immediate neighborhood. (The very closest star after the Sun is Proxima Centauri, and it can't be seen with the naked eye.) The main definition of a high mass star is a star that can eventually explode as a supernova. For that the star needs to be around at least 8 times the Sun's mass. I would say Vega is best thought of as "medium mass".
High mass.
A white dwarf is the remnant of a low to medium mass star.
Helium. A low mass star does not have enough mass to generate the heat needed to fuse helium.
The sun is an intermediate-mass star.
Low mass
There are more low mass stars. this is for two reasons:- # the star forming process generates more low mass stars # High mass stars burn out very quickly and explode as supernovas and thus over time there are less and less of them.