NOVA

The 170-Year Search for a Planet Beyond Neptune

Planet Nine’s existence is not the first time astronomers have predicted a planet they couldn’t see. Clyde Tombaugh was looking for Planet X when he accidentally found Pluto. After Voyager 2 flew by Neptune in 1989, new calculations determined there was no Planet X. But three years ago, a disturbance was detected at the far reaches of the Solar System.

The 170-Year Search for a Planet Beyond Neptune

2m 29s

  • Ultimate Crash Test: Countdown: asset-mezzanine-16x9

    Ultimate Crash Test: Countdown

    S52 E10 - 53m 29s

    What really happens in a multi-vehicle pileup? A first-of-its-kind experiment aims to stage a high speed crash to gain new insights on car safety. But how can they create and study a complex collision without putting any lives in danger?

  • Critical Condition: Health in Black America: asset-mezzanine-16x9

    Critical Condition: Health in Black America

    S52 E9 - 1h 36m

    Black Americans are nearly twice as likely to suffer from chronic diseases than Whites. Why? From false beliefs that permeate modern medicine to life experiences that can damage human cells, uncover the underlying causes of racial health disparities.

  • When Machines Prescribe: asset-mezzanine-16x9

    When Machines Prescribe

    17m 19s

    Doctors rely on computer programs to make decisions about diagnosis and treatment. Designed to weigh factors like symptoms, medical history, and test results to achieve the best possible outcomes for patients, some common medical algorithms were built using data based on old pseudoscience about racial differences. Investigate how their continued use has harmed the health of Black patients.

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