For the last 35,000 years, the orbit of Mars has been getting slightly more eccentric because of the gravitational effects of the other planets. The closest distance between Earth and Mars will continue to mildly decrease for the next 25,000 years. Habitability and search for life
Learner's definition of CONTINUUM. [count] formal. : a range or series of things that are slightly different from each other and that exist between two different possibilities. His motives for volunteering lie somewhere on the continuum between charitable and self-serving. a continuum of temperatures ranging from very cold to very hot.
Medical Definition of isometric. 1: of, relating to, or characterized by equality of measure; especially : relating to or being a crystallographic system characterized by three equal axes at right angles.