Astronomers are searching the solar system for new planets and Uranus’s orbit suggested Neptune exists. KBO orbits suggest Planet 9 exists. Contacting aliens might be us digging fossils on Mars or radio telescopes picking up a signal.
Tag: Planet Nine
Dec 31st: Exoplanet Could Be Similar To Theoretical Planet 9
HD 106906 b is an exoplanet 336 light years away, 11 times the size of Jupiter, and possibly an analog of our own not-yet-discovered Planet 9.
Apr 7th: Does Planet Nine exist?
Why do we think the solar system might have another planet? Why do we think it doesn’t? How do test for something that’s too far away to see? I discuss these questions and more in today’s Ask a Spaceman!