Planets

MERCURY. Mercury is the closest planet to the Sun. It is the second-smallest planet within Earths solar system. Mercury ranges from -0.4 to 5.5 in apparent magnitud. Mercury is close to the Sun that telescopes. Mercury has no natural satellites. The only spacecraft to approach Mercury was Mariner 10 (1974-75); only 40-45% of the planet has been mapped. VENUS. Venus is the second planet from the Sun its named after the Roman goddess Venus it is a planet very similar in size to Earth. It is sometimes called Earths "sister planet". Sometimes as the "morning star" or the "evening star", it is by far the brightest "star" in the sky. EARTH The Earth was entirely molten about 4.6 billion years ago. Gravity would have caused substances to sink in the center in a process called chemical differentiation, while less dense substances would have migrated to the crust. MARS Mars is the fourth planet from the Sun in the solar system, named for the Roman god of war. The counterpart of the Greek Ares on account of its blood red color as viewed in the night sky. Mars has two small moonss, Phobos and Deimos, both small and oddly shaped, possibly captured asteroids. JUPITER Jupiter is the fifth planet from the Sun and by far the largest within our solar system: some have described the solar system as consisting of the Sun, Jupiter. It and the other gas giants Saturn, Uranus, and Neptune are sometimes referred to as "Jovian planets." SATURN Saturn is the sixth planet from the Sun. It is a gas giant the second-largest planet in the solar system after Jupiter. Saturn's atmosphere exhibits a banded pattern similar to Jupiters but Saturn's bands are much fainter and they're also much wider near the equator. Saturn's cloud patterns were not observed until the Voyager flybys. Since then Earth-based telescopy has improved to the point where regular observations can be made. Saturn exhibits long-lived ovals and other features common on Jupiter: in 1990 the Hubble Space Telescope. URANUS Uranus is the seventh planet from the Sun. It is a gas giant and the third largest by diameter.Uranus are similar to the cores of Jupiter and Saturn minus the massive liquid metallic hydrogen envelope. It appears that Uranus does not have a rocky core like Jupiter and Saturn but rather that its material is more or less uniformly distributed. NEPTUNE. Neptune is the eighth planet from the sun in our solar system. It is a gas giant, named after the Roman god of the sea. After the discovery of Uranus, it was noted the orbits of Uranus, Saturn, and Jupiter were not acting according to the laws of Kepler and Newton. Adams and Le Verrier independently calculated the location of another planet Neptune which was located by Galle on September 23 1846 within 1° of where Adams and Le Verrier had predicted it to be. Later Galileo had observed Neptune in 1611 but he had thought it was a star. PLUTO. Pluto is the ninth and smallest planet of our solar system It was discovered by the astronomer Clyde Tombaugh at the Lowell Observatory in Arizona on February 18 1930 Tombaugh was searching for a "Planet X" to explain the orbit of Neptune: further analysis with seven decades more data about Neptune's position, has resolved the perceived anomaly without need for an additional gravitational pull on Neptune.

Youssef Mouawad 9.6 science.