We all know that the gravitational field of any moon causes tides on its home planet. The height of the tide for a moon also depends upon the nature of the surface of the planet. If the surface is covered with water, such as an ocean or an inland sea, the tide can be many meters high as we see on the Earth.
Much work has been done to precisely measure the distance to Earth’s moon, and we have found that it is slowly drifting away from our planet. But not all moons around planets are drifting away. Moons are fated to be cut loose from their home planet and drift away, or else to be shredded into relatively tiny particles and circle their planets as a spectacular ring. The two moons of Mars have different endings…
Dr. Barth helps us understand why all moons are eventually doomed on this episode of ‘How Do You KNOW?’
- Return to the How Do You KNOW? index of programs.
Professionally packed and fast shipping
Our long-standing partnership with UPS FedEx DHL and other international carriers lets us offer various shipping options. Our warehouse staff are highly skilled and will pack your products according to our exact and precise specifications. Before they are shipped your items will be thoroughly inspected and secured. We deliver to thousands of customers every day from all over the world. This is a sign of our determination to be the largest online retailer on the planet. The distribution centers and warehouses distribution are situated in Europe and the USA.
Note that orders containing more than one item are processed according to the item.
Prior to shipment, all purchased items will be thoroughly inspected. Today, most orders will be delivered within 48 hours. The delivery time varies between 3-7 days.
Returns
The inventory is constantly changing and we cannot control it completely because of the fact that multiple stakeholders are involved, including our warehouse and factory. The stock can change at any moment. It's possible that the stocks could be depleted after the order has been made.
Our policy lasts thirty days. If it's been more than 30 days since the date you made your purchase and we're unable to offer you a full refund or exchange.
You are able to return a product if it is unused and still in the same state as when you received it. It should also be in the original package.
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