These satellites are actually designed to fall back to the Earth after five to 15 years. We do that so that we don't leave them in orbit. That creates a space junk problem, a different story.

The beginnings of a strange layer of molten rock deep inside the Earth may have finally been figured out by geoscientists. This layer, known as the D" layer, is about 1,900 miles underneath the ...

An increasing number of seismologists are using fiber optic cables to detect seismic waves on Earth ... Could fiber optic cable help scientists probe the deep layers of the moon? Date: February 29 ...

Venera 8 artwork shows the landing capsule on the cloud-veiled world on July 22, 1972. (Image credit: NPO Lavochki) Lost in space. Meanwhile, the botched probe that failed to get from Earth to ...

Earth’s core has two layers. A hot, solid metal sphere of iron and nickel is roughly 70% the size of the moon, with a radius of about 759 miles (1,221 kilometers).

Why Earth's Core Is Cooling Faster Than Expected The research team’s original intent was to gather more data from its discovery last year—that the rotation of the inner core may be slowing.