Outside forces: gravity, solar wind, something (unknown, not visible particles) are hitting it.Could simply be "outgassing" something.
Like a rocket, it moves off in the opposite direction.

26 posted on
03/14/2019 3:09:31 PM PDT by
ETL
(Obama-Hillary, REAL Russia collusion! Uranium-One Deal, Missile Defense, Iran Deal, Nukes: Click ETL)