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.
The primary stars in the system, Alpha Centauri A and Alpha Centauri B are about 4.37 light-years from Earth. A third star, Proxima Centauri (sometimes called Alpha Centauri C) is gravitationally associated with the former, but is actually slightly closer to Earth at 4.24 light-years away.oss 248, about 10.32 light-years form Earth, is actually moving so fast that in about 36,000 years it will actually take over the title as the closest star to Earth (besides our Sun). However, it will quickly begin moving away again and will relinquish the title about 9,000 years later.