Which is the farthest object we know of in the solar system, a planetary system consisting of Earth? Many would answer that Pluto, once a planet and now a dwarf planet, is wrong. There are objects in the Solar System...
In 1961, Wally was the youngest member of NASA's astronaut crew. She was 21 years old at the time. Valley was a member of the space travel program 'Mercury 13'. But in the end, NASA decided not to send the...
In a three-phase process in which four hydrogen atoms combine to form a helium nucleus, the Sun converts about 600 million metric tons of hydrogen per second to 596 million metric tons of helium. Then that depleted four million metric...
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