Light nanosecond
In a light year, light travels nearly six trillion miles. In a light nanosecond, roughly, it travels one foot.
Haabaa Brain Teaser
September 15, 2006
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September 4, 2006
Termination shock
Who would be most interested in termination shock? An astronomer, as it marks the limits of the Sun’s influence.
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Zodiac and ecliptic
The 12 zodiacal constellations cross the Earth’s ecliptic which is the path the Sun seems to take through the sky.
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Colourful stars?
Most stars appear white because they don’t emit enough light for us to see color.
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Superman and Pluto
If Superman can fly at the speed of light, it would take him 6 hours to reach Pluto.
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Scale the asteroid belt
If the Earth were the size of a marble, the asteroid belt would be spread over 100,000 square meters. And if all those asteroids were rolled up into a ball at that scale, the ball would be the size of a grain of sand…
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6.6 sextillion short tons and 260 billion cubic miles
The planet we’re taliking about is 4.5 billion years old and has a mass of 6.6 sextillion short tons and a volume of 260 billion cubic miles. It is Earth of course 
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