NASA Purpose nasa insight landing time purpose of mars mission and NASA Purpose

NASA Purpose nasa insight landing time purpose of mars mission and NASA Purpose

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A little interesting about space life.

When the astronomers measured variations in the light reflected off Nix and Hydra, they obtained the first clues of the Pluto system's chaos. When studying images obtained from HST between 2005 and 2012, the astronomers were surprised to find that the brightness changed unpredictably, rather than following a regular cycle. This weird discovery could only be explained by chaotic movement.

and here is another

The most detailed pictures of Europa show even more intriguing clues that there is slush lurking beneath its brightly shining icy surface. Slightly smaller than Earth's own beloved Moon, Europa's surface temperature could easily freeze an ocean solid over a span of only several million years. However, some astronomers think that warmth from a game of tidal tug-of-war between Europa and Jupiter, as well as other neighboring moons, could be keeping large regions of Europa's subsurface global ocean in a life-friendly liquid state. This process is termed tidal heating, and it refers to a mechanism whereby the gravitational tugs of a nearby object (or objects) flex and bend and contract and expand another object continually. This constant churning causes the victimized object, in this case Europa, to heat up and be considerably more balmy than its great distance from the Sun would otherwise allow it to be.

and finally

Moons are natural satellites that orbit another body that, in turn, circles its parent-star. A moon is held in place by both its own gravity and the gravitational grip of its host planet. Some planets have moons; some do not. Several asteroids in our Solar System also are orbited by very small moons--and some dwarf planets, such as Pluto, also have moons. One of Pluto's five moons, Charon, is almost 50% the size of Pluto. For this reason, the two frozen worlds inhabiting our Solar System's remote twilight zone, are sometimes classified as a double-planet.

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In addition to the Giant Impact theory, there are several other models that have been proposed to explain how our Moon was born. One alternative model to the Giant Impact scenario suggests that Earth's Moon was once a part of our planet that simply budded off when our Solar System was in its infancy--approximately 4.5 billion years ago. According to this model, the Pacific Ocean basin would be the most likely cradle for lunar birth. A second model proposes that our Moon was really born elsewhere in our Solar System and, like the duo of tiny potato-shaped Martian moons, was eventually snared by the gravitational tug of a major planet. A third theory postulates that both Earth and Moon were born at about the same time from the same protoplanetary accretion disk, composed of gas and dust, from which our Sun's family of planets, moons, and smaller objects ultimately emerged.

The current study's Franco-Belgian-Japanese collaboration looks forward to this mission. JAXA plans to enlist them to conduct tests on the Martian samples when they are returned to Earth. The samples will help the scientists determine whether Phobos is indeed made up of a mixture of Martian mantle and debris left in the wake of the tragic crash of the doomed, vanished protoplanet--as suggested by their supercomputer simulations.

Saturn has 62 known moons. Most of them are very small, icy worldlets. On June 11, 2004, shortly before arriving at Saturn, the Cassini spacecraft made its only flyby--at an altitude of 2,000 kilometers--past the very tiny icy moon Phoebe. Phoebe is a heavily cratered worldlet that circles its planet backwards--indicating that it is a captured object, born elsewhere, and not an original member of Saturn's family.