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.
Worded definition, a unit of language, consisting of one or more spoken sounds or their written representation, that functions as a principal carrier of meaning. Words are composed of one or more morphemes and are either the smallest units susceptible of independent use or consist of two or three such units combined under certain linking conditions, as with the loss of primary accent that distinguishes blackÂ·birdÂ· from blackÂ· birdÂ·.