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.
If you travel twice the speed of light in 2016 and back to Earth at the same speed, You will find yourself in the year 504 A.D.or pehaps 8064 A.D. in the future. Alpha Centauri is appx 4 light years from Earth (measured in Earth years).