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49-72 of 597 results for: Materials Submitted by Dr. Troy Tenhet

Neptune is one of the two planets that cannot be seen without a telescope. The other is Pluto. Neptune is about 30 times... see more

Mercury is the planet nearest the sun. It has a diameter of 3,032 miles (4,879 kilometers), about two-fifths of Earth's... see more

'Icebergs are a natural and beautiful part of Earth's cryosphere, and are closely monitored and studied by scientists... see more

'Since the dawn of civilization, man was limited by his vision and imagination about his understanding of the universe.... see more

'Earth is our home planet. Scientists believe Earth and its moon formed around the same time as the rest of the solar... see more

'A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong... see more

Venus is known as the Earth's "twin" because the two planets are so similar in size. The diameter of Venus is about 7,520... see more

The Sun is a huge, glowing ball at the center of our solar system. The sun provides light, heat, and other energy to... see more

Pluto, (PLOO toh), is a dwarf planet that orbits far from the sun. It shares the region of its orbit, known as the Kuiper... see more

Mars is the fourth planet from the sun. The planet is one of Earth's "next-door neighbors" in space. Earth is the third... see more

'The Huygens Probe was named after Christiaan Huygens, a Dutch astronomer who in 1655 discovered Titan, Saturn's largest... see more

'Since the beginning of civilization, people have wondered if we are alone in the universe or whether there is... see more

Found here are a vareity of resources that concern aeronautics including images, articles and current events.

An artificial satellite is a manufactured object that continuously orbits Earth or some other body in space. Most... see more

Uranus, (YUR uh nuhs or yu RAY nuhs), is the seventh planet from the sun. Only Neptune and Pluto are farther away. Uranus... see more

A rocket is a type of engine that pushes itself forward or upward by producing thrust. Unlike a jet engine, which draws... see more

A planet is a large, round heavenly body that orbits a star and shines with light reflected from the star. Eight planets... see more

Moon is Earth's only natural satellite and the only astronomical body other than Earth ever visited by human beings. The... see more

Jupiter is the largest planet in the solar system. Its diameter is 88,846 miles (142,984 kilometers), more than 11 times... see more

'Hurricanes are large, swirling storms. They produce winds of 119 kilometers per hour (74 mph) or higher. That's faster... see more

'Throughout its long history, Earth has warmed and cooled time and again. Climate has changed when the planet received... see more

'Europa is an icy world slightly smaller than Earth's moon. It is unique in the solar system, being thought to have a... see more

'The dancing lights of the aurora provide spectacular views on the ground, but also capture the imagination of scientists... see more

Born in 1930, Neil A. Armstrong, a United States astronaut, was the first person to set foot on the moon. On July 20,... see more