THE DECODE
Big questions. Clear answers.
The stories behind how things work — from space and machines to science and technology.
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THE FEATURED DECODE
How Does GPS Know Where You Are?
GPS uses a network of satellites orbiting Earth.Each satellite continuously broadcasts a signal containing information about: Where it is? What time the signal was sent? That signal travels through space at the speed of light. Your phone simply listens.
THE LATEST DECODE
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How Does GPS Know Where You Are?
GPS uses a network of satellites orbiting Earth.Each satellite continuously broadcasts a signal containing information about: Where it is? What time the signal was sent? That signal travels through space at the speed of light. Your phone simply listens.
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PALE BLUE DOT
The Pale Blue Dot is a photograph of Earth taken Feb. 14, 1990, by NASA’s Voyager 1 at a distance of 3.7 billion miles (6 billion kilometers) from the Sun. The image inspired the title of scientist Carl Sagan’s book, “Pale Blue Dot: A Vision of the Human Future in Space,” in which he wrote:…
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Why We Look Up?
Apollo 11 astronaut Buzz Aldrin on the Moon. Look for Neil Armstrong reflected in Aldrin’s visor. During the following three-and-a-half years, 10 astronauts followed in their footsteps.Image Credit: NASA The human story behind our journey to space We have always looked up. Long before rockets, satellites and space telescopes, humans stared at the night sky…