There is no longer any star called Alpha Velorum. It was split off into the constellation Carina and thus Vela does not have an alpha star.
Alpha Arae (Tchou or Choo) is the second brightest star in the constellation AraIt is a variable Be star [See related link] and has a spectral class of B3V
Alpha Centauri is a binary star system, commonly known as Alpha Centauri ABAlpha Centauri A is about the same size and age as our Sun with a spectral type of G2VAlpha Centauri B is about 14% smaller that our Sun and a lot cooler having a spectral type of K1VThere is a third star, not surprisingly called Alpha Centauri C or Proxima Centauri which is the closest star to Earth.See related link for more information.
The brightest star is The Persian (alpha alpha), with magnitude 3.11
Alpha Centauri (Rigil Kentaurus, Rigil Kent, or Toliman) is a binary star systemAlpha Centauri A is a G2 star or yellow dwarf - very similar to our own SunAlpha Centauri B is a K1 star or orange dwarf.and possibly a triple star system.Alpha Centauri C (Proxima Centauri) is a M5 star or red dwarfAlpha Centauri (Rigil Kentaurus) is the brightest star in the southern constellation of Centaurus. Although it appears to us as a single object, Alpha Centauri is actually a binary star system.Alpha Centauri A has a spectral type of G2V - so it is a yellow dwarf.Alpha Centauri B has a spectral type of G2V - so it is an orange dwarf.
Polaris (the North star - Alpha Ursae Minoris) is a triple star system, but appears to us as a single star. Alpha Centauri is also another triple star system. And there are many more.
There are five first or second magnitude (simply: brighter) stars in the constellation: Alpha Velorum (Regor), which is the brightest; and four second-magnitude stars: Delta Velorum, Kappa Velorum, Lambda Velorum (Suhail), and Mu Velorum. In addition, there are several 'deep sky" objects which can be seen in the constellation. This article has more information: http://stargazing.suite101.com/article.cfm/the_constellation_of_vela
red star
Alpha Pavonis (Alpha Pav) is a class "B" blue-white binary star.
There is no "star alpha". Alpha is PART of the name of many stars - basically one for each constellation.
There is no star that is simply called "Alpha". There are several that have "alpha" in their name, for example Alpha Centauri, Alpha Cruxis, Alpha Canis Majoris, etc. - usually the brightest star in each constellation. Some stars such as Betelgeuse (Alpha Orionis) are not actually the brightest star in the constellation.
Aldebaran, Taurus's alpha star, is a red giant.
Alpha Cassiopeiae (Schedar) is the second brightest star in the constellation Cassiopeia.It is an orange giant star with a spectral type of K0.See related link for more information.
LARGEST PLANET STAR OF CANER THE CRAB ZODIAC STAR CONSTELLATION
Sadalmelik (Alpha Aquarii) is a G2 spectral type star; a yellowish white giant star.
Alpha Arae (Tchou or Choo) is the second brightest star in the constellation AraIt is a variable Be star [See related link] and has a spectral class of B3V
Gamma Velorum (Suhail and Suhail al Muhlif) is a star system in the constellation Vela.There are at least six stars associated with it.The brightest star (γ² Velorum) is a binary pair consisting of a blue supergiant and a massive wolf rayet star.So the colour is probably blue.
Alpha Carinae (Canopus) is the brightest star in the southern constellation of Carina and Argo Navis.It has a spectral type of F0 and is a white star.