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