Human first encounters with interstellar objects

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Oumuamua, the first discovered interstellar object, accelerated faster than it should have and that made may people puzzled because the normal asteroids and comets do accelerate only under the influence of external forces like being pushed or hits or coming in places too closed to planets and stars and being influenced by the space curvature (their gravity). So, how did it accelerated so fast? The astrophysicist Neil deGrasse Tyson and comic co-host Chuck Nice dive in the StarTalk episode into the mysteries of the newest objects in the solar system: “dark comets” and interstellar objects with astrophysicist Darryl Seligman.

This interstellar object was detected by the Pan-STARRS telescope in the year 2017 and it left scientists baffled with its hyperbolic orbit, indicating it came from beyond our solar system and would never return - it was just passing by and probably just watching us just like we were watching it. Learn how its unexplained acceleration expands our conventional understanding of celestial objects watching the video.

The discussion timestamps are following:

  • 00:00 - Introduction: Darryl Seligman
  • 02:14 - Discovery of ‘Oumuamua
  • 06:04 - Interstellar objects versus comets
  • 9:23 - ‘Oumuamua’s non-gravitational acceleration
  • 15:02 - Is ‘Oumuamua a dark comet?
  • 20:12 - What the Vera Rubin Observatory will do
  • 22:15 - Dark comets in our solar system
  • 28:17 - Where did water on earth come from?
  • 32:30 - The future of interstellar object discovery
  • 35:30 - A cosmic perspective
Astronomy
Dan-Marius Sabău
Dan-Marius Sabău

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