WEBVTT FILE 1 00:00:00.090 --> 00:00:03.170 [Music] 2 00:00:03.170 --> 00:00:08.210 [Music] How do we find worlds orbiting other stars? 3 00:00:08.210 --> 00:00:13.340 [Music] Transits are now the most successful method. 4 00:00:13.340 --> 00:00:21.430 [Music] As a planet passes in front of its star, it blocks some of the light, causing a slight drop in brightness. 5 00:00:21.430 --> 00:00:25.480 [Music] If these dips repeat, it could indicate a planet. 6 00:00:25.480 --> 00:00:29.600 [Music] 7 00:00:29.600 --> 00:00:33.740 [Music] The size and shape of the dips tell us planet size and orbit, 8 00:00:33.740 --> 00:00:37.910 [Music] 9 00:00:37.910 --> 00:00:41.990 [Music] or even if there are several worlds. 10 00:00:41.990 --> 00:00:46.090 [Music] 11 00:00:46.090 --> 00:00:50.230 [Music] Transits have led us to thousands of new planets already. 12 00:00:50.230 --> 00:00:52.230 [Music] 13 00:00:52.230 --> 00:01:01.428 [Music] Upcoming missions like TESS will find thousands more.