WEBVTT 00:01.534 --> 00:05.839 align:left position:82.5%,start line:83% size:7.5% at the end of this week to plants will do a cosmic backpedal that had 00:05.939 --> 00:10.043 align:left position:82.5%,start line:83% size:7.5% astronomers scratching their heads for centers that's right James Mars and 00:10.143 --> 00:14.514 align:left position:85%,start line:83% size:5% Mercury will begin moving backwards against the background start we call it 00:14.614 --> 00:20.286 align:left position:80%,start line:83% size:10% retrograde motion what we talking about let's show you ok we have our sky set 00:20.387 --> 00:26.893 align:left position:82.5%,start line:83% size:7.5% for just after sunset facing west just pull you close to the horizon starting 00:26.993 --> 00:31.264 align:left position:82.5%,start line:83% size:7.5% on April 19 Merkel will begin getting lower in the sky today as it starts 00:31.364 --> 00:36.336 align:left position:87.5%,start line:83% size:2.5% cashing in on May 9 Wilson much we passed directly in front the Sun and 00:36.436 --> 00:40.907 align:left position:80%,start line:83% size:10% what astronomers call a transit advance our clock to midnight we'll see the 00:41.007 --> 00:45.945 align:left position:80%,start line:83% size:10% planet mars among the stars of Scorpius this working as a leech past 23 Mar is 00:46.046 --> 00:50.383 align:left position:85%,start line:83% size:5% moving westward just as it nears the constellation Libra on July 4th to 00:50.483 --> 00:54.483 align:left position:80%,start line:83% size:10% resume its normal west to east movement among the stars keep looking up