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In space, astronauts eat tortillas instead of bread due to safety reasons. Bread crumbs could get loose and damage delicate equipment on the spacecraft.

In space, astronauts eat tortillas instead of bread due to safety reasons. Bread crumbs could get loose and damage delicate equipment on the spacecraft.

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The first person to pay for visiting outer space is Dennis Tito.

The first person to pay for visiting outer space is Dennis Tito. His one week trip to the International Space Station cost 20 million dollars, and was courtesy of the Russians. NASA wasn't thrilled.

The first living creature in outer space was a female Samoyed husky dog named Laika. She was launched aboard the Russian spacecraft Sputnik 2 on November 3rd, 1957.

The first man in space boarded the Russian spacecraft Vostok 1 in April 12, 1961 with a 50-50 chance of survival.

The first man in space boarded the Russian spacecraft Vostok 1 in April 12, 1961 with a 50-50 chance of survival. The spacecraft orbited the earth for one hour and 48 minutes and returned successfully.

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Earth's gravity field extends well into outer space. It's strong enough to keep our moon in place, and will eventually pull back all the satellites we have launched into orbit.

The day Saturday is named after the planet Saturn, which in turn was named after the Roman god of agriculture, Saturn.

Around 60 tons of cosmic dust falls down to Earth from outer space every day.

Around 60 tons of cosmic dust falls down to Earth from outer space every day. Every breathing organism inhales some of this ancient dust, which long ago may have formed a star or a planet.

The planet Venus is named after the Roman goddess of love. It is the brightest planet in the night sky and the only planet to be named after a female.

Dust storms sometimes cover the planet of Mars for months at a time. The storms, powered by solar heating, can envelop the entire planet in just days.

The densest planet in our solar system is our own Earth. The least dense is Saturn. If all the planets were placed in a massive ocean, only Saturn would float.

The distance from the Earth to the sun is 92 million miles (146 million km). Even at the incredible speed of light, it takes 8 minutes for the sun's light rays to reach us once they leave the sun.

Venus is the hottest planet in our solar system. The surface temperature on Venus is a burning 461.85 °C (863.33 °F). On Pluto it is so cold that liquid nitrogen turns to solid! Pluto's estimated surface temperature is around -228°C (-378°F).

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Astronomers think Neptune may have oceans that are made up of liquid diamonds.

Astronomers think Neptune may have oceans that are made up of liquid diamonds.

The planet Saturn has 62 moons. One of it's moons named Titan is the only one in our solar system known to have an atmosphere.

The planet Saturn has 62 moons. One of it's moons named Titan is the only one in our solar system known to have an atmosphere.

The American space shuttle is the most complex machine ever built. It is made up of 2.5 million parts and it's engines produced 44 million horsepower on takeoff. The space shuttle program closed on July 21, 2011, after having brought 3 millions pounds of cargo into space.

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