The speed of rotation of Earth is decreasing due to revolution of Moon

Rotation of Earth and revolution of moon
The speed of rotation of Earth is decreasing due to revolution
of moon around the Earth. (Credit: NASA)

The days are getting longer due to motion of moon around the Earth. Although this is happening at extremely slow rate but the day length is getting longer. The day length has increased by 1.7 milliseconds during the last 100 years. This seems unusual because we have never felt the elongation of day length. The day length is increasing because of the decrease in speed of rotation of Earth. The revolution of moon around the Earth is applying a pull which is trying to slow down the rotation of Earth. Let’s understand it in detail. Continue reading “The speed of rotation of Earth is decreasing due to revolution of Moon”

Why do planets spin?

Rotation of planets
Earth rotates on its axis in nearly 24 hours. (credit : NASA)

Our universe is full of mysterious objects and amazing phenomena. All the objects of universe rotate in one or other way. For example planets spin on their axis and revolve around the sun. The sun also spins and revolves around the center of the galaxy. Even the galaxy itself rotates. Have you ever thought why do these bodies rotate? Continue reading “Why do planets spin?”