1 00:00:02,535 --> 00:00:07,407 MAY THE FOURTH BE WITH YOU STAR NERDS. I M TRACE, AND IN HONOR OF LUKE SKYWALKER S DOUBLE-SUNNED 2 00:00:07,407 --> 00:00:11,978 HOME PLANET LET S FIND AN OPTICAL DOUBLE STAR SYSTEM IN OUR OWN SKIES! 3 00:00:11,978 --> 00:00:14,047 HIT THE DARKNESS ANY NIGHT THIS WEEK JUST AFTER 4 00:00:14,047 --> 00:00:17,250 DARK AND FACE NORTH TO FIND THE BIG DIPPER IN URSA MAJOR. 5 00:00:17,250 --> 00:00:20,286 LOOK FOR THE STAR AT THE BEND IN THE BIG DIPPER'S HANDLE: THAT S MIZAR AND IF YOU 6 00:00:20,286 --> 00:00:24,057 LOOK CLOSELY YOU LL SEE A SMALL, FAINT COMPANION STAR NAMED ALCOR. TOGETHER, 7 00:00:24,057 --> 00:00:28,762 THEY RE CALLED THE HORSE AND RIDER AND WERE OFTEN USED AS A TEST OF A PERSON S EYESIGHT. 8 00:00:28,762 --> 00:00:33,566 IN STAR WARS, TATOOINE IS A DESERT PLANET WITH TWO SUNS CALLED A BINARY STAR SYSTEM. 9 00:00:33,566 --> 00:00:37,404 MIZAR AND ALCOR AREN T IN THE SAME SYSTEM, THEY JUST APPEAR CLOSE TOGETHER, 10 00:00:37,404 --> 00:00:40,907 BUT MOST POINTS OF LIGHT WE SEE ARE MULTI-STAR SYSTEMS WITH TWO (OR MORE) 11 00:00:40,907 --> 00:00:45,879 STARS! THE KEPLER SPACE TELESCOPE FOUND AN EXOPLANET ORBITING TWO STARS IN 2011! 12 00:00:45,879 --> 00:00:49,879 BUT THAT CAN T BE TATOOINE BECAUSE IT S IN A GALAXY FAR, FAR AWAY. KEEP LOOKIN UP!