doi:10.3724/sp.j.1440-2807.2024.03.35Cunningham, CliffordJournal of Astronomical History & Heritage
In his book "Pale Blue Dot: A Vision of the Human Future in Space" (Random House, 1994), astronomer and science communicator Carl Sagan once beautifully summed up how "big" Earth is for humanity. "That's home. That's us," Sagan wrote. "On it, everyone you love, everyone you know,...
Earth is the planet that we live in. In terms of the solar system planetary ordering, Earth is the third planet closest to the Sun. As far as we know, Earth is the only place in the observable universe that hosts life as we know it. Earth's age is 4.5 billion years o...
How big is the boost from an equatorial launch? To make a rough estimate, we can determine Earth's circumference by multiplying its diameter by pi (3.1416). The diameter of Earth is approximately 7,926 miles (12,753 kilometers). Multiplying by pi yields a circumference of something like 24...
How big is the boost from an equatorial launch? To make a rough estimate, we can determine Earth's circumference by multiplying its diameter by pi (3.1416). The diameter of Earth is approximately 7,926 miles (12,753 kilometers). Multiplying by pi yields a circumference of something like 24...
"To obtain an idea of the size of a light-year, take the circumference of the Earth (24,900 miles), lay it out in a straight line, multiply the length of the line by 7.5 (the corresponding distance is one light-second), then place 31.6 million similar lines end to end," NASA's ...
Just 90 feet upslope from Mill Creek, a crack split open across the top of the pipeline, stretching nearly one-quarter of its circumference. The pressure in the pipeline at the time was well below what the Keystone is designed to handle, and well ...
This incredibly accurate science experiment was centuries ahead of its timeAlex Kuzoian
How big is the boost from an equatorial launch? To make a rough estimate, we can determine Earth's circumference by multiplying its diameter by pi (3.1416). The diameter of Earth is approximately 7,926 miles (12,753 kilometers). Multiplying by pi yields a circumference of something like 24...