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720,000 km/h (450,000 mi/h) [10] Orbital period. ~230 million years [10] The Solar System [d] is the gravitationally bound system of the Sun and the objects that orbit it. [11] It was formed 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.
The eight planets of the Solar System with size to scale (up to down, left to right): Saturn, Jupiter, Uranus, Neptune (outer planets), Earth, Venus, Mars, and Mercury (inner planets) A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis ...
NASA Space Place. Logo for NASA Space Place Program. Publishers. NASA. Players. 2–10. targeting upper-elementary aged children. Launched in 1998, [2] [3] it was the first NASA website to create content about multiple missions directly for children. It has its own url, and it also serves as the kids' portion of the NASA Science Mission ...
Venus to scale among the terrestrial planets of the Solar System, which are arranged by the order of their Inner Solar System orbits outward from the Sun (from left: Mercury, Venus, Earth and Mars) Venus is one of the four terrestrial planets in the Solar System, meaning that it is a rocky body like Earth.
Saturn is the only planet of the Solar System that is less dense than water—about 30% less. Although Saturn's core is considerably denser than water, the average specific density of the planet is 0.69 g/cm 3 due to the atmosphere. Jupiter has 318 times Earth's mass, and Saturn is 95 times Earth's mass.
NASA was established on July 29, 1958, with the signing of the National Aeronautics and Space Act and it began operations on October 1, 1958. [4] As the United States' premier aeronautics agency, NACA formed the core of NASA's new structure by reassigning it its 8,000 employees and three major research laboratories.
List of planet types. From top to bottom: Mercury, Venus without its atmosphere, Earth and the Moon, Mars, Jupiter, Saturn, Uranus, and Neptune (not to scale) The following is a list of planet types by their mass, orbit, physical and chemical composition, or by another classification. The IAU defines that a planet in the Solar System must orbit ...
At that time, Uranus, Neptune, nor the asteroid belts have been discovered yet. Discovery and exploration of the Solar System is observation, visitation, and increase in knowledge and understanding of Earth 's "cosmic neighborhood". [1] This includes the Sun, Earth and the Moon, the major planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus ...
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