Is Earth Getting Fatter Around the Belt?
Besides being used for transmission of this email message to you, communication satellites are used for some neat science. By shooting a laser beam onto them and measuring how long it takes for light to bounce back, scientists at NASA measure precise orbits of…
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Geology
CALIPSO in 2004
From reports of increasing temperatures, thinning mountain glaciers and rising sea level, scientists know that…
Chemistry
What Are Isotopes?
Many of the known elements from which our universe is constructed exist in various isotopic forms. The…
Physics
Nuclides & Isotopes
An atom that has an unbalanced ratio of neutrons to protons in the nucleus seeks to become more stable. The…
Astronomy
The Real Lord of the Rings
Why is Saturn the only planet with bright, easily seen rings? Saturn is not the only planet in our solar…