# Why is the Earth still spinning? [duplicate]

I understand that scientists believe the earth and the moon were spinning at the same speed as each other at the time they experienced acceleration (were formed). I also know that the reason given for why the moon no longer spins is that the earths gravitational attraction for the moon stole the energy after 3.5 billion years.

So why is the earth still spinning?

Given that the sun's attraction for the earth is 100 times stronger than the earths attraction for the moon.

## marked as duplicate by Jon Custer, John Rennie newtonian-mechanics StackExchange.ready(function() { if (StackExchange.options.isMobile) return; $('.dupe-hammer-message-hover:not(.hover-bound)').each(function() { var$hover = $(this).addClass('hover-bound'),$msg = $hover.siblings('.dupe-hammer-message');$hover.hover( function() { $hover.showInfoMessage('', { messageElement:$msg.clone().show(), transient: false, position: { my: 'bottom left', at: 'top center', offsetTop: -7 }, dismissable: false, relativeToBody: true }); }, function() { StackExchange.helpers.removeMessages(); } ); }); }); Jun 4 '17 at 6:30

• you mean spinning around itself ? because the moon still spins around itself. – Ismasou Jun 3 '17 at 20:26
• It is the tidal force that robed the moon of its spin. The sun/earth tidal force is small compared to the earth/moon tidal force. – Lewis Miller Jun 3 '17 at 20:31
• – lemon Jun 3 '17 at 20:38
• Related: physics.stackexchange.com/q/112336/2451 and links therein. – Qmechanic Jun 4 '17 at 1:15
• The Earth is still spinning because it was spinning 4.5 billion years ago. Just as an external force is needed to make a moving object slow down, an external torque is needed to make a spinning object slow down. There are external torques on that act on the Earth, but they are rather small. – David Hammen Jun 4 '17 at 7:57