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.
Definition of STREAMLINE. 1. : the path of a particle in a fluid relative to a solid body past which the fluid is moving in smooth flow without turbulence.2. a: a contour designed to minimize resistance to motion through a fluid (as air) b: a smooth or flowing line designed as if for decreasing air resistance.ADVERTISEMENT. to design or make (something, such as a boat or car) with a smooth shape which makes motion through water or air easier. : to make (something) simpler, more effective, or more productive.