When Is the Earth Nearest the Sun?
When Is the Earth Nearest the Sun? The Earth is nearest to the Sun on about the second or third day in January. The distance varies because the Earth spins round the...
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Who Sent the First Radio Message?
Who Sent the First Radio Message? Guglielmo Marconi is usually credited with sending the first radio message. Marconi was born in Bologna, Italy, in 1874 to an Italian...
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When Was the First Gas Balloon Used?
When Was the First Gas Balloon Used? The first gas balloon, filled with hydrogen, was released in Paris in August, 1783 which was designed by a French professor of...
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Who Was the Last Man to Discover a Planet?
Who Was the Last Man to Discover a Planet? Clyde Tombaugh, a young American research student, made the last discovery of a planet while working in 1930 at the Lowell...
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How Far Can You See?
How Far Can You See? How far the human eye can see depends on how many particles of light, or photons, a distant object emits. The farthest object visible with the...
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