A Moment of Science

Posts tagged horizon

January 1, 2013

 

the sea with a boat in the distance

How Far Away Is The Horizon?

The horizon line can be a tricky thing to measure...

January 26, 2012

 

blue sky with clouds

Why The Sky Is Not Blue

This is partly due to pollution, but even in the cleanest air the sky is lighter near the horizon due to the effect of earth's atmosphere on sunlight.

August 14, 2007

 

Cloudy sky over landscape

A Cloud Magnet

If you look at the sky on a cloudy day, you will find more clouds near the horizon than directly overhead. Why? Learn more on this Moment of Science.

January 26, 2007

 

evening star and moon above a mountain range at sunrise

Evening Star

Star light, star bright, the first star I see tonight... What is this legendary star? Is it even a star at all?

September 27, 2003

 

Sunrise, Sunset

Now, at sunset, the lowest mile or so of the atmosphere is filled with things like vehicle exhaust, dust, smoke, and water vapor, and all these pollutants scatter light.

September 27, 2003

 

When the Sky Turns Green

If you look at the horizon at sunset–exactly as the last sliver of sun disappears–you might see a flash of brilliant green blaze across the sky.

September 27, 2003

 

Motion Sickness

During voyage of the Beagle, Charles Darwin was often overcome by seasickness and discovered that “nothing but lying in [his] hammock did any good.”This remedy–lying down with eyes shut–is one of the most effective for treating motion sickness.

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