Every 27 days, the Sun spins on its axis. The mobility of sunspots was used to detect this rotation. In reality, the equatorial areas of the Sun spin quicker (in around 24 days) than the polar regions (which rotate once every more than 30 days). But since we can't see inside the Sun, we have no way of knowing exactly what's going on there. However, recent observations using space-based telescopes have revealed that something strange is happening in the outer layers of the Sun. These layers are called the corona and they're made up of plasma that's been energized by the heat of deeper within the star. In addition, some parts of the corona appear to be rotating along with the Earth as it orbits the Sun. More recently, instruments have been sent into orbit around the Moon and even aboard spacecraft en route to Venus and Mars. Using these instruments, scientists have been able to observe the corona from different angles and in various wavelengths of light. Their findings have confirmed that certain regions of the corona do in fact rotate together with the Earth. The exact reason for this movement remains a mystery. Some researchers believe it may be related to a process called "sunspot cycle" which occurs when groups of magnetic fields emerge into view from below our planet's surface. These groups then rise to the surface where they can be seen from Earth.