The Telescope. 84 and came to the conclusion that light takes sixteen minutes and twenty-six seconds to travel across the whole breadth of the Earth's path round the Sun. … Now the distance of the Sun is known, and the diameter of the Earth's orbit must be twice that amount. It is one hundred and ninety millions of miles ; and if light can traverse such a space in sixteen minutes and twenty-six seconds, its rate per second must be one hundred and ninety-two thousand…
Astronomy Observers\ manuals
Internet Archive · Scientific and Technical Information Center (STIC), United States Patent and Trademark Office · Public domain (published before 1931). Free to use for anything.
