The Hubble Telescope has given humanity its greatest vantage yet on the universe. This video features images and narration (edited for brevity) provided by NASA highlighting Hubble's spectacular discoveries.
Home! Earth, the 3d planet from the Sun, formed 4.5 bya and weighs 6.58 billion trillion tons. Earth is not a perfect sphere, but an oblate spheroid, “squashed” a little at the North and South poles. The equatorial diameter is about 7,926 miles, but the polar diameter is 7,899.86 miles. Earth’s s...