The term "Astronaut" comes from Greek words that mean "Star" and "Sailor".
An astronaut is someone who travels in space. While the term was once reserved for military-trained professionals, recent accessibility of space travel has seen the term astronaut now used to refer to anyone traveling in a spacecraft, including civilians.
The word astronaut includes the root naut, from nautes, the Greek word for "sailor." This suffix can be used to create many travel-specific words. For example, the Argonauts were mythical Greek sailors on the ship named the Argo. Astronaut gets the astro from the Greek word astron, meaning "star," making an astronaut a "star sailor." Russian space explorers took the title cosmonauts, with the cosmo part coming from the Greek for "universe," kosmos, so both have the same meaning.
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The Yamato dynasty of Japan traces its origins to 660 A.D., making them the oldest continuous hereditary monarchy in the world.
The 79-year-old Emperor Akihito has reigned since 1989 and is, according to legend, the 125th emperor in his line, though there's some debate as to the exact count of emperors. His seat is called the Chrysanthemum Throne and sits in the Imperial Palace in Kyoto.
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There are no rivers in Saudi Arabia.Saudi Arabia does not have any permanent rivers, but does have numerous valleys which are riverbeds that are either permanently or intermittently dry. This list is arranged by drainage basin, with respective tributaries indented under each larger stream's name.
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The planets in our solar system orbit around the sun. One orbit of the Earth takes one year. Meanwhile, our entire solar system – our sun with its family of planets, moon, asteroid and comets – orbits the center of the Milky Way galaxy. Our sun and solar system move at about about 500,000 miles an hour (800,000 km/hr) in this huge orbit. So in 90 seconds, for example, we all move some 12,500 miles (20,000 km) in orbit around the galaxy's center.
Our Milky Way galaxy is a big place. Even at this blazing speed, it takes the sun approximately 230 million years to complete one journey around the galaxy's center.
This amount of time – the time it takes us to orbit the center of the galaxy – is sometimes called a cosmic year.
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Look at the usual flat map of the world and it appears that Greenland is nearly as big as Africa. But it's not even close. Africa is 14 times larger. Flat maps significantly distort the sizes of countries and continents, the result of converting a spherical surface to a handy rectangle. The area of landmasses becomes increasingly exaggerated toward the poles.
As a result, we tend to underestimate the size of countries close to the equator, and substantially overestimate the size of countries closer to the poles. On our actual planet, Africa is bigger than China, India, the contiguous U.S. and most of Europe—combined!
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Early players of Basketball used soccer balls.A game that started with 18 men in a YMCA gymnasium in Springfield, Massachusetts, now has grown into a game that more than 300 million people play worldwide. The man who created this sport was Dr. James Naismith.
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The 2008 Olympics in Beijing, China, cost over US$40 billion, making it the second most expensive Games after the Russian 2014 Winter Olympics.
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Canada is the second largest country on the face of the Earth, and it has a lot to brag about. Out of all the natural lakes in the world, more than 50% are situated in Canada.
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The sun orbits around the Milky Way at a speed of about 220 km (140 miles) per second. Yes, the Sun - in fact, our whole solar system - orbits around the center of the Milky Way Galaxy. We are moving at an average velocity of 828,000 km/hr. But even at that high rate, it still takes us about 230 million years to make one complete orbit around the Milky Way!
The Milky Way is a spiral galaxy. We believe that it consists of a central bulge, 4 major arms, and several shorter arm segments. The Sun (and, of course, the rest of our solar system) is located near the Orion arm, between two major arms (Perseus and Sagittarius). The diameter of the Milky Way is about 100,000 light-years and the Sun is located about 28,000 light-years from the Galactic Center.
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