WEBVTT 00:20.787 --> 00:22.689 align:left position:15% line:89% size:75% AUTUMNAL EQUINOX - ITS FALL 00:22.789 --> 00:26.326 align:left position:42.5% line:83% size:47.5% DEAN: HEY THERE STAR GAZERS, I'M DEAN REGAS ASTRONOMY 00:26.426 --> 00:27.827 align:left position:45% line:83% size:45% FOR THE CINCINNATI OBSERVATORY. 00:27.927 --> 00:29.929 align:left position:42.5% line:83% size:47.5% JAMES: AND I'M JAMES ALBURY THE DIRECTOR OF THE KIKA 00:30.030 --> 00:32.365 align:left position:72.5% line:89% size:17.5% SILVA PLA PLANETARIUM IN GAINESVILLE FLORIDA. 00:32.465 --> 00:36.102 align:left position:77.5% line:83% size:12.5% WERE HERE TO HELP YOU FIND YOUR WAY AROUND THE SKY. 00:36.202 --> 00:38.772 align:left position:82.5% line:89% size:7.5% OK DEAN, WHAT THE HECK ARE YOU DOING? 00:38.872 --> 00:41.775 align:left position:42.5% line:83% size:47.5% DEAN: I HEARD A RUMOR THAT YOU CAN BALANCE AN EGG, 00:41.875 --> 00:46.312 align:left position:77.5% line:83% size:12.5% ON-END, ON THE SPRING OR FALL EQUINOXES SO I WANTED TO TRY IT OUT. 00:46.413 --> 00:47.347 align:left position:42.5% line:83% size:47.5% JAMES: ANY LUCK? 00:47.447 --> 00:48.615 align:left position:42.5% line:83% size:47.5% DEAN: NOT YET. 00:48.715 --> 00:51.618 align:left position:42.5% line:83% size:47.5% JAMES: (I HATE TO TELL DEAN BUT, THATS JUST AN URBAN 00:51.718 --> 00:52.952 align:left position:40% line:89% size:50% LEGEND. 00:53.053 --> 00:55.889 align:left position:77.5% line:83% size:12.5% BUT WHAT DOES HAPPEN DURING THE EQUINOX IS TRULY AMAZING. 00:55.989 --> 00:58.892 align:left position:77.5% line:89% size:12.5% THE SUN RISES DUE EAST AND SETS DUE WEST). 00:58.992 --> 01:01.461 align:left position:42.5% line:83% size:47.5% DEAN: AND THERE ARE 12 HOURS OF DAYLIGHT AND 12 01:01.561 --> 01:03.730 align:left position:80% line:89% size:10% HOURS OF DARKNESS OVER THE ENTIRE WORLD. 01:03.830 --> 01:06.499 align:left position:42.5% line:83% size:47.5% JAMES: AND THE AUTUMNAL EQUNIOX IS COMING UP ON SEPTEMBER 01:06.599 --> 01:07.500 align:left position:42.5% line:89% size:47.5% 23RD. 01:07.600 --> 01:09.269 align:left position:10% line:89% size:80% SO WHATS REALLY GOING TO HAPPEN? 01:09.369 --> 01:10.904 align:left position:25% line:89% size:65% DEAN: LETS SHOW YOU! 01:11.004 --> 01:14.274 align:left position:42.5% line:83% size:47.5% JAMES: AUTUMN OFFICIALLY BEGINS AT THE AUTUMNAL EQUINOX, 01:14.374 --> 01:17.010 align:left position:30% line:83% size:60% SEPTEMBER 23RD, SO GET READY FOR SOME 01:17.110 --> 01:19.779 align:left position:70% line:89% size:20% IN-YOUR-FACE SUNRISES AND IN-YOUR-FACE SUNSETS. 01:19.879 --> 01:22.816 align:left position:42.5% line:83% size:47.5% DEAN: ON THE EQUINOXES THE SUN RISES DUE EAST 01:22.916 --> 01:24.651 align:left position:27.5% line:89% size:62.5% AND SETS DUE-WEST. 01:24.751 --> 01:29.222 align:left position:87.5% line:83% size:2.5% THAT MEANS IF YOU DRIVE TO WORK ON A DUE-EAST ROAD AT SUNRISE THE SUN WILL RISE 01:29.322 --> 01:32.625 align:left position:32.5% line:83% size:57.5% DIRECTLY OVER THE YELLOW LINE IN THE MIDDLE OF THE ROAD. 01:32.725 --> 01:36.262 align:left position:85% line:83% size:5% AND IF YOU DRIVE HOME AT SUNSET ON A DUE-WEST HIGHWAY, 01:36.362 --> 01:41.634 align:left position:80% line:89% size:10% THE SUN WILL SET RIGHT IN FRONT OF YOU. 01:41.734 --> 01:44.370 align:left position:25% line:83% size:65% THAT COULD MAKE FOR A BLINDING COMMUTE! 01:44.471 --> 01:47.874 align:left position:42.5% line:83% size:47.5% JAMES: YOU ACTUALLY MIGHT NOTICE THIS DAZZLING SUNRISE 01:47.974 --> 01:52.078 align:left position:77.5% line:83% size:12.5% AND SUNET FOR A WEEK ON EITHER SIDE OF THE EQUINOXES, 01:52.178 --> 01:53.813 align:left position:10% line:89% size:80% AND DRIVING CAN BE TREACHEROUS. 01:53.913 --> 01:56.983 align:left position:12.5% line:83% size:77.5% SO GET OUT YOUR SUNGLASSES AND PUT THOSE SUN VISORS DOWN. 01:57.083 --> 02:00.086 align:left position:42.5% line:83% size:47.5% JAMES: BUT WHAT ARE THE EQUINOXES ANYWAY? 02:00.186 --> 02:05.492 align:left position:72.5% line:83% size:17.5% WELL, THE WORD 'EQUINOX' COMES FROM THE LATIN, 'EQUI' WHICH MEANS EQUAL, AND 'NOX' WHICH 02:05.592 --> 02:07.293 align:left position:35% line:89% size:55% MEANS NIGHT. 02:07.393 --> 02:11.831 align:left position:77.5% line:83% size:12.5% SO ON BOTH THE SPRING AND FALL EQUINOXES, THE HOURS OF NIGHT ARE EQUAL TO THE HOURS 02:11.931 --> 02:13.032 align:left position:35% line:89% size:55% OF DAYLIGHT. 02:13.133 --> 02:14.567 align:left position:42.5% line:83% size:47.5% DEAN: YOU'VE PROBABLY LEARNED THAT AS THE EARTH 02:14.667 --> 02:16.836 align:left position:12.5% line:89% size:77.5% CIRCLES THE SUN, IT IS TILTED. 02:16.936 --> 02:20.874 align:left position:77.5% line:83% size:12.5% WHEN THE NORTHERN HEMISPHERE OF THE EARTH IS TILTED TOWARD THE SUN, THATS WHEN WE HAVE 02:20.974 --> 02:22.408 align:left position:40% line:89% size:50% SUMMER. 02:22.509 --> 02:25.078 align:left position:70% line:83% size:20% WE GET MORE ENERGY FROM THE SUN AND HAVE LONGER DAYS AND SHORTER NIGHTS. 02:25.178 --> 02:27.380 align:left position:42.5% line:83% size:47.5% JAMES: WHEN WE'RE ON THE OTHER SIDE OF THE SUN, AND 02:27.480 --> 02:31.951 align:left position:75% line:83% size:15% THE NORTHERN HEMISPHERE IS TILTED AWAY FROM THE SUN, WE GET LESS ENERGY FROM THE SUN AND 02:32.051 --> 02:33.920 align:left position:85% line:89% size:5% HAVE SHORTER DAYS AND LONGER NIGHTS. 02:34.020 --> 02:36.356 align:left position:42.5% line:83% size:47.5% DEAN: BUT IN BETWEEN SUMMER AND WINTER WE COME 02:36.456 --> 02:39.959 align:left position:77.5% line:83% size:12.5% TO POINTS WHERE THE SUN FALLS DIRECTLY ON THE EQUATOR. 02:40.059 --> 02:43.530 align:left position:72.5% line:83% size:17.5% AND THAT MEANS AS THE EARTH TURNS, EVERYWHERE ON OUR PLANET RECEIVES 02:43.630 --> 02:47.000 align:left position:72.5% line:89% size:17.5% 12 HOURS OF DAYLIGHT AND 12 HOURS OF DARKNESS. 02:47.100 --> 02:49.769 align:left position:10% line:89% size:80% EQUAL DAY, EQUAL NIGHT, EQUINOX. 02:49.869 --> 02:52.572 align:left position:42.5% line:83% size:47.5% DEAN: IF YOU WATCH THE SUN RISE ON THE FIRST DAY 02:52.672 --> 02:55.542 align:left position:75% line:89% size:15% OF SPRING YOU'LL SEE THAT IT RISES DUE EAST. 02:55.642 --> 03:00.446 align:left position:72.5% line:83% size:17.5% BUT IF YOU WATCH THE SUN RISE EACH SUCCESSIVE DAY AFTER THAT YOU'LL NOTICE THAT IT'LL RISE 03:00.547 --> 03:06.519 align:left position:67.5% line:83% size:22.5% A LITTLE BIT FARTHER NORTH OF EAST EACH SUCCESSIVE DAY UNTIL IT REACHES IT'S FARTHEST POINT NORTH 03:06.619 --> 03:08.755 align:left position:85% line:89% size:5% OF EAST ON THE FIRST DAY OF SUMMER, 03:08.855 --> 03:11.624 align:left position:42.5% line:83% size:47.5% JAMES: THEN THE SUN WILL SEEM TO BACK UP AND RISE 03:11.724 --> 03:17.230 align:left position:75% line:83% size:15% A LITTLE BIT LESS NORTHEAST EACH SUCCESSIVE DAY UNTIL ONCE AGAIN ON THE FIRST DAY OF AUTUMN 03:17.330 --> 03:19.132 align:left position:22.5% line:89% size:67.5% IT WILL RISE DUE EAST. 03:19.232 --> 03:24.037 align:left position:72.5% line:83% size:17.5% THEN EACH SUCCESSIVE DAY IT WILL RISE A LITTLE BIT FARTHER SOUTH OF EAST UNTIL ON THE FIRST 03:24.137 --> 03:29.642 align:left position:70% line:83% size:20% DAY OF WINTER WHEN IT WILL RISE AT ITS FARTHEST POINT SOUTHEAST, AFTER WHICH IT WILL SLOWLY 03:29.742 --> 03:31.978 align:left position:87.5% line:83% size:2.5% START TO RETRACE ITS JOURNEY NORTH ONCE AGAIN. 03:32.078 --> 03:35.615 align:left position:42.5% line:83% size:47.5% DEAN: AND THIS ENTIRE CYCLE REPEATS YEAR AFTER YEAR 03:35.715 --> 03:37.450 align:left position:35% line:89% size:55% AFTER YEAR. 03:37.550 --> 03:41.321 align:left position:77.5% line:83% size:12.5% IN FACT, ALMOST ALL ANCIENT CULTURES KEPT TRACK OF THIS RISING AND SETTING OF THE SUN 03:41.421 --> 03:43.723 align:left position:85% line:89% size:5% AT DIFFERENT PLACES ON THE HORIZON. 03:43.823 --> 03:46.859 align:left position:77.5% line:83% size:12.5% MAYBE THEY WOULD SET UP STONES TO MARK THE SUNRISE AND 03:46.960 --> 03:47.860 align:left position:32.5% line:89% size:57.5% SUNSET POINTS. 03:47.961 --> 03:48.962 align:left position:42.5% line:83% size:47.5% JAMES: OR POSTS. 03:49.062 --> 03:49.963 align:left position:37.5% line:89% size:52.5% OR MOUNDS. 03:50.063 --> 03:50.930 align:left position:35% line:89% size:55% OR WINDOWS. 03:51.030 --> 03:51.931 align:left position:27.5% line:89% size:62.5% OR EVEN BUILDINGS. 03:52.031 --> 03:52.932 align:left position:35% line:89% size:55% SORRY, DEAN. 03:53.032 --> 03:53.933 align:left position:40% line:89% size:50% NO EGGS. 03:54.033 --> 03:55.134 align:left position:42.5% line:83% size:47.5% DEAN: AWW MAN! 03:55.235 --> 03:56.903 align:left position:42.5% line:83% size:47.5% JAMES: WITH THESE MARKERS THEY COULD MEASURE THE 03:57.003 --> 03:59.806 align:left position:72.5% line:89% size:17.5% LENGTH OF YEAR AND CREATE THE FIRST CALENDARS. 03:59.906 --> 04:03.676 align:left position:42.5% line:83% size:47.5% DEAN: SO PUT THOSE SUN VISORS DOWN AS YOU DRIVE 04:03.776 --> 04:08.181 align:left position:75% line:83% size:15% BACK AND FORTH TO WORK NEXT WEEK AND WHY NOT START YOUR OWN PERSONAL RECORD - 04:08.281 --> 04:13.152 align:left position:72.5% line:83% size:17.5% KEEPING TRACK OF WHERE THE SUN RISES AND SETS ON YOUR HORIZON THROUGHOUT THE YEAR. 04:13.253 --> 04:15.321 align:left position:42.5% line:83% size:47.5% JAMES: STARTING NEXT WEEK, YOULL DEFINITELY NOTICE 04:15.421 --> 04:18.825 align:left position:75% line:83% size:15% THAT THE SUN WILL RISE AND SET FARTHER SOUTH EACH DAY - 04:18.925 --> 04:21.894 align:left position:85% line:83% size:5% AND THAT MEANS WINTER IS ONLY A FEW MONTHS AWAY. 04:21.995 --> 04:25.832 align:left position:75% line:83% size:15% AND DEAN, ONLY I CAN BALANCE AN EGG WHENEVER I WISH! 04:25.932 --> 04:27.800 align:left position:42.5% line:83% size:47.5% DEAN: NO WAY! 04:27.900 --> 04:31.900 align:left position:42.5% line:83% size:47.5% BOTH: KEEP LOOKING UP!