Galileo Solar System Project 29 best images about jupiter on pinterest largest planet Galileo Project Solar System

Galileo Solar System Project 29 best images about jupiter on pinterest largest planet Galileo Project Solar System

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Interesting facts about space.

However, the truth is, during their entire voyage to the Moon and back to Earth, Armstrong, Aldrin and Collins only received amount of radiation equal to about 0.1% of the deadly dose. Their total exposure was approximately 11 milisieverts, and radiation dose lethal to an average human being is aroung 8,000 millisieverts.

and here is another

Earth's bewitching large Moon was probably born as the result of an immense impact, when a Mars-size protoplanet named Theia smashed into Earth about 4.5 billion years ago. This cataclysmic collision is thought to have hurled a vast amount of Earth-stuff and Theia-stuff into orbit around our ancient planet. Debris from the two unfortunate bodies gradually accumulated to give birth to our Moon, as tumbling little newborn moonlets crashed into one another and melded together into one large object.

and finally

Earth's Moon is the fifth largest moon in our Solar System, and the only world beyond our own that we have walked upon, leaving our footprints behind in moon dust as a silent testimony that once we existed, and had been there. Our Moon is both the brightest and largest object in Earth's night sky, and many astronomers think that our bewitching lunar companion was born as a result of an ancient collision between our planet and an ill-fated Mars-sized protoplanet that has been named Theia. There are other theories that have been devised to explain our Moon's origin, but the Giant Impact theory is considered to be the best explanation. When the doomed Theia blasted into the primordial Earth, it launched into the sky above our planet the debris resulting from that catastrophic crash. The debris eventually coalesced into Earth's Moon.

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The inner Solar System is dramatically different from the distant realm of the giant planets. The inner region of our Solar System, where our Earth is situated, is almost entirely moon-less. Of the four relatively small, rocky worlds--Mercury, Venus, our Earth, and Mars--Mercury and Venus are barren of moons, and Mars is orbited by two fascinating, but very small, potato-shaped moons named Phobos and Deimos. The duo of Martian moons are often considered to be captured asteroids that long ago escaped from their birthplace in the Main Asteroid Belt between Mars and Jupiter. According to this scenario, Phobos and Deimos, during their dangerous journey from their original home, were snared by the gravity of their adopted Red Planet when our 4.56 billion-year-old Solar System was young. In the warm and well-lit inner Solar System, only Earth's large Moon is a significant moon-world in its own right.

Earth's Moon consists of a core, mantle, and crust. The lunar core is proportionally smaller than other terrestrial bodies' cores. The iron-rich, solid inner core is 149 miles in radius, and it is encased within a liquid iron shell that is about 56 miles thick. A partly molten layer with a thickness of 93 milles surrounds the iron core.

"What makes the Saturn system so beautiful and unique could be its youth. While we don't have a preferred time frame for this origin scenario to play out, it could have happened recently if something came along to destabilize the Saturn system, triggering the collisional mergers that formed Titan," Asphaug added.