nongravitational
adjective
non路grav路i路ta路tion路al
| \ 藢n盲n-藢gra-v蓹-藞t膩-shn蓹l
, -sh蓹-n岬妉\
, -sh蓹-n岬妉\
Definition of nongravitational
: not of, relating to, or caused by gravitation : not gravitational
Each time a periodic comet revisits the inner solar system, it can experience the gentle effects of dust-bearing gas jets erupting on its sun-warmed surface. These so-called nongravitational forces can advance or retard a comet's date of return by hours or years.— Daniel Pendick
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