The discovery of Eris led to Pluto's demotion to dwarf planet.
Solar eclipses are one of nature’s grandest events. What is a solar eclipse? Why are there different kinds of solar eclipses? How do they work? And when is the next one? We explain.
The Wright Brothers’ first plane flight in Kitty Hawk lasted just 12 seconds in 1903, but Orville and Wilbur made history with their Wright Flyer.
The 1903 Wright Flyer that made history's first flight was a relatively simple machine with propellers and wire controls.
Most of the star nearest to Earth are red dwarfs, but they are too dim to be seen with the naked eye.
Learn about the physical characteristics of Saturn and its famous rings, what we know about Saturn’s moons and Saturn’s roots in Greek mythology.
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