Chaos theory is a popular name for the mathematical study of complex, unstable systems. A system tends to be chaotic when even a small change in initial conditions can lead to drastically different results. Chaos theory has obvious applications...

Earth has only one satellite, the Moon. Moon is the second brightest object in the sky, as seen from the planet. The Earth is always moving. It spins or rotates while traveling in a big circle around the Sun. Its orbit or path around the Sun is...

It was not discovered until 1665 that other planets had natural satellites as well, at which point "moon" started to be dropped and instead referred to as "The Moon" . Although the moon looks white in the sky, its surface is actually about as bright...

The Sun is the nearest star to Earth and is the center of our solar system. Sun is also an operative star that manifests sunspots, solar flares, erupting prominences, and coronal mass ejections. The Sun is some 30,000 light years from the center of...