1 To work in the Security and Maintenance window, you should be logged into an administrator account. 2  From the desktop window, right-click the Start button (the button with the Windows icon) from the bottom-left corner of the screen. 3  From the context menu that appears, click Control Panel.
Alpha Centauriâs surface temperature is a few degrees Kelvin less than our sun (that is, about 5770 k), but its greater diameter (about 25% more than the sun) and the overall larger surface area gives it a luminosity nearly 1.6 times that of our star.
Proxima Centauri has been the nearest star for about 32,000 years, and it will hold this record for another 33,000 years. It will make its closest approach to the Sun in about 26,700 years, getting to within 3.11 light-years of Earth.After 33,000 years from now, the nearest star will be Ross 248.lpha Centauri A is just a little more massive and brighter than the Sun, and Alpha Centauri B is slightly less massive than the Sun. Then thereâs a third member of this system, the faint red dwarf star, Proxima Centauri. Alpha Centaur System. Itâs the closest star to our Sun, located just a short 4.24 light-years away.