The Moon takes about 29.5 days to go through all its phases, which is called the lunar cycle. During this cycle, you can see different...
For the Maya, the universe was a vast web connecting humans, gods, and celestial bodies. They believed that the sky reflected the earthly world and...
Among the Assyrians, an eclipse was viewed as a major cosmic concern: it was believed that a demon or a hostile deity was literally attacking...
The Big Dipper, also known by the nickname Great Casserole, owes much of its popularity to the surprisingly regular arrangement of its main stars. It...
If the universe were infinite, eternal, and uniformly filled with stars, then every direction of the sky would be occupied by a star. The result? The night...
The Earth spins like a top around its axis, an imaginary line connecting the North Pole to the South Pole. This rotation occurs towards the...
When we drive and look at the Moon, it feels like it moves with us, even though it obviously doesn't really move alongside us. This...
Stars are mainly composed of hydrogen and helium, with a few other elements in small quantities, such as carbon, oxygen, or iron. This gaseous cocktail...
Halley's comet orbits the Sun in a highly elongated elliptical path, somewhat like a stretched rugby ball. At its closest point to the Sun, the...
The sun on the horizon passes through more of the atmosphere than when it is high in the sky. As a result, sunlight undergoes refraction, meaning it...
