Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Saturn, along with Jupiter, Uranus and Neptune, is classified as a gas giant. Together, these four planets are sometimes referred to as the Jovian, meaning "Jupiter-like", planets. Saturn is named after the Roman god Saturn (that became the namesake of Saturday), equated to the Greek Kronos (the Titan father of Zeus) the Babylonian Ninurta and to the Hindu Shani. Saturn's symbol represents the god's sickle (Unicode: ♄). The planet Saturn is composed of hydrogen, with small proportions of helium and trace elements.[11] The interior consists of a small core of rock and ice, surrounded by a thick layer of metallic hydrogen and a gaseous outer layer. The outer atmosphere is generally bland in appearance, although long-lived features can appear. Wind speeds on Saturn can reach 1,800 km/h, significantly faster than those on Jupiter. Saturn has a planetary magnetic field intermediate in strength between that of Earth and the more powerful field around Jupiter. Saturn has a prominent system of rings, consisting mostly of ice particles with a smaller amount of rocky debris and dust. Sixty-one known moons orbit the planet, not counting hundreds of "moonlets" within the rings. Titan, Saturn's largest and the Solar System's second largest moon (after Jupiter's Ganymede), is larger than the planet Mercury and is the only moon in the Solar System to possess a significant atmosphere.
One of the main quests of science throughout the ages has been to discover what matter is made of - and what holds it together. All matter is made out of many tiny particles called atoms. The study of how these atoms interact is called chemistry. Modern physics has discovered how atoms are made up of smaller particles and how these particles interact to build atoms into molecules and larger objects of matter.
Our nearest neighbor in space, the Moon is the only natural satellite of the Earth. Apart from the Sun, it is the brightest object in the sky. It is 384,400 kilometers from Earth and has a diameter of 3,476 kilometers. Great plains stretch over the moon's surface, dotted with huge mountains and scarred by numerous craters.
The solar system consists of the Sun; the eight planets, 165 satellites of the planets, 5 dwarf planets, a large number of Small Solar System Bodies (including comets and asteroids), and the interplanetary medium. A planet is any of the eight major celestial bodies. The inner solar system contains the Sun, Mercury, Venus, Earth and Mars; The planets of the outer solar system are Jupiter, Saturn, Uranus, and Neptune.
Generally, a computer is any electronic data-processing device that performs tasks, such as mathematical calculations or electronic communication, under the control of a set of instructions called a program. Programs usually reside within the computer's main memory and are retrieved and processed by the computer's electronics, and the program results are stored or routed to output devices, such as video display monitors or printers.
Physics is the science of Nature in the broadest sense. Physicists study the behaviour and interactions of matter and energy, which are referred to as physical phenomena. Physics is the study of matter, energy, motion, and forces. Physics is a major branch of science, concerned with the fundamental components of the universe, the forces they exert on one another, and the results produced by these forces.
Archaeology is the science of unearthing sites containing remains of ancient habitation, with the goal of learning about culture, society, ecology, intellectual life and beliefs; modern archaeology employs the tools of history, anthropology, geology, and biology to recover the hidden past. Archaeology studies ancient peoples and cultures by analyzing their artifacts, inscriptions, monuments, and other remains. Archaeology comes from the Greek archaiologia, meaning the discussion of antiquities. An archaeologist studies former cultures and societies by examining the material things they left behind. This normally involves digging, either on land or the sea bed, and observing what is discovered, where it is found, and what is near it.
