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.
Alpha Centauri is the nearest star system to our sun at 4.3 light-years away. Thatâs about 25 trillion miles (40 trillion km) away from Earth â nearly 300,000 times the distance from the Earth to the sun. How might we travel to Alpha Centauri, the next-nearest star? And how long would it take to get there? Follow the links below to learn more.