Math Helped Find Neptune. Could Planet Nine Be Next?

Unexpected motion in Uranus's orbit helped astronomers predict where to look for Neptune in 1846. Could gravity help guide another planetary search? Neptune's discovery is a historical precedent, not proof of Planet Nine. Modern telescope footage illustrates astronomical observing; it does not show the original 1846 discovery. Watch the full Planet Nine investigation on ASTROLECT. Subscribe for more space mysteries. VISUAL CREDITS & SOURCES ESO/José Francisco Salgado (josefrancisco.org): https://www.eso.org/public/videos/insidevlt1timelapse/ https://www.eso.org/public/videos/lasillatimelapseesompg/ https://www.eso.org/public/videos/vltandatrotationtimelapse/ ESO/B. Tafreshi: https://www.eso.org/public/videos/uhd_bt_paranal_10_aux/ NASA’s Scientific Visualization Studio: https://svs.gsfc.nasa.gov/4559/ Neptune image processing: Paul Schenk (Lunar and Planetary Institute); Björn Jónsson (The Planetary Society). NASA/JHUAPL (Johns Hopkins Applied Physics Lab): https://svs.gsfc.nasa.gov/11952/ NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Lunar and Planetary Institute: https://science.nasa.gov/photojournal/soaring-over-pluto/ ESO material: Creative Commons Attribution 4.0 International. https://creativecommons.org/licenses/by/4.0/ https://www.eso.org/public/outreach/copyright/ Changes: excerpts trimmed, cropped, resized, speed-adjusted, mildly graded, muted and captioned. Visual playback speeds are illustrative. Original editing, captions and sound mix: ASTROLECT. #Neptune #PlanetNine #Astronomy