WEBVTT FILE 1 00:00:00.000 --> 00:00:08.833 ON-SCREEN TEXT: NASA's TESS mission discovered something new about a fascinating stellar pair just 130 light-years away. 2 00:00:08.833 --> 00:00:16.833 ON-SCREEN TEXT: Both of the young stars host planets. 3 00:00:16.833 --> 00:00:25.000 ON-SCREEN TEXT: The stars are of similar age and are traveling in nearly the same direction ... 4 00:00:25.000 --> 00:00:33.416 ON-SCREEN TEXT: ... so scientists think they're stellar siblings, born from the same gas cloud. 5 00:00:33.416 --> 00:00:38.500 ON-SCREEN TEXT: TESS detected the stars' planets by looking for regular dips in starlight. 6 00:00:38.500 --> 00:00:47.416 ON-SCREEN TEXT: These dips are called transits. 7 00:00:47.416 --> 00:00:55.583 ON-SCREEN TEXT: One system, called TOI 2076, has three mini-Neptunes ... 8 00:00:55.583 --> 00:01:01.250 ON-SCREEN TEXT: ... planets larger than Earth but smaller than Neptune. 9 00:01:01.250 --> 00:01:04.250 ON-SCREEN GRAPHIC: TOI 2076 b; size: 3.2x Earth, orbit: 10.4 days 10 00:01:04.250 --> 00:01:07.250 ON-SCREEN GRAPHIC: TOI 2076 c; size: 4.4x Earth, orbit: over 17 days 11 00:01:07.250 --> 00:01:11.833 ON-SCREEN GRAPHIC: TOI 2076 d; size: 4.1x Earth, orbit: over 17 days 12 00:01:11.833 --> 00:01:16.833 ON-SCREEN TEXT: The other, called TOI 1807, hosts a single planet about twice Earth's size. 13 00:01:16.833 --> 00:01:20.666 ON-SCREEN GRAPHIC: TOI 1807 B; size: 1.8x Earth, orbit: 0.5 days 14 00:01:20.666 --> 00:01:29.666 ON-SCREEN TEXT: We don't know much about these planets yet ... 15 00:01:29.666 --> 00:01:38.166 ON-SCREEN TEXT: ... but scientists are excited to study them further with missions like NASA's Hubble and James Webb space telescopes. 16 00:01:38.166 --> 00:01:46.833 ON-SCREEN TEXT: These worlds could help us better understand how young planetary systems evolve. 17 00:01:46.833 --> 00:01:55.833 ON-SCREEN TEXT: In the meantime, TESS will continue hunting for faraway worlds and help unlock even more of their secrets. 18 00:01:55.833 --> 00:02:03.957 NASA logo