Chapter
Predicting the trajectory of asteroids and comets
33:45 - 36:43 (02:57)
The primary force acting on a rock like an asteroid is gravity, while for a comet, sunlight reflecting off its surface gives it a push. About a tenth of the comet's mass needs to be evaporated to create enough push.
Clips
An analysis of a mysterious celestial object named Omuamua that shows evidences of an excess push beyond the force of gravity upon approaching the Earth's orbit.
33:45 - 35:06 (01:21)
Astronomy
Summary
An analysis of a mysterious celestial object named Omuamua that shows evidences of an excess push beyond the force of gravity upon approaching the Earth's orbit.
ChapterPredicting the trajectory of asteroids and comets
Episode#154 – Avi Loeb: Aliens, Black Holes, and the Mystery of the Oumuamua
PodcastLex Fridman Podcast
Comets can be propelled through space by the reflectance of sunlight off their surfaces.
35:06 - 36:43 (01:36)
space
Summary
Comets can be propelled through space by the reflectance of sunlight off their surfaces. In order for this to occur, approximately one-tenth of the comet's mass must be evaporated.