On my alternate Earth, its moon has a diameter of 3,274 miles and orbits the planet from a distance of about 665,000 miles. A five-mile-deep mantle separates its rocky crust from its core made entirely of iron. Questions follow:
Will Earth still rotate at 24 hours and revolve around the sun at...
My latest story takes place inside a hollow Earth. I tend to overthink my explanations for how things work. For example, I am wondering how light would work in a hollow earth if the center of the Earth had a small, bright star suspended in the middle with a revolving layer of rock (or something...