Give Now

A Moment of Science

Posts tagged sky

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.

June 5, 2009

 

Moon over colorful cityscape

Why Doesn’t the Moon Fall Down?

Contrary to what fairy tales tell us, there is nothing holding the moon up in the sky. So why doesn't it fall down? Find out on this Moment of Science.

May 28, 2009

 

Man gazing out at world

Follow that Gaze

Ever wonder why you follow someone's gaze whey they're looking into the sky? Find out on today's Moment of Science.

April 22, 2008

 

Red sunset over ocean

Red Sky at Night

People have been predicting weather since long before we had Doppler radar, and many of these prediction strategies have survived as popular folk sayings.

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 23, 2006

 

sky_diver

Dancing in Air

A skydiver's body is in a delicate balance. Gravity tugs her downward with a constant, relentless force, while air resistance pushes her upward.

January 2, 2006

 

Zoom!

You’re out on a clear, starry night with your best friend, looking for shooting stars. Look, there’s one, your friend shouts, but by the time you look, it’s gone. There’s another, she cries. Too late, you missed it. Then one comes along that seems to just amble across the sky, nice and slow. Why is it that some shooting stars are so fast and others are much slower? Learn more on this Moment of Science.

December 20, 2005

 

Faster Than a Speeding Moon

How fast does light travel? What could you do to find out? One natural thing to try is to have someone send some light your way and see how long it takes to reach you. How about if you got a friend to shine a flashlight at you from a distant hill, exactly at midnight? With your stopwatch you start counting the seconds until you see the light. Learn more on this Moment of Science.

November 23, 2005

 

Haul Me Up or Haul You Down?

We’ve been imagining that we’re sitting in a geostationary satellite. That’s a satellite that orbits the equator at the same speed and direction as the earth turns. That means it’s always over the same spot of land, as if it were floating in the sky 22,500 miles up. We let down a rope to pull up some supplies. Will this work? Learn more on this Moment of Science.

March 31, 2005

 

How Far?

For a long time people have been fascinated by comets passing by the earth. How close are they? Learn more on this Moment of Science.

Next Page »

Stay Connected

What is RSS? RSS makes it possible to subscribe to a website's updates instead of visiting it by delivering new posts to your RSS reader automatically. Choose to receive some or all of the updates from A Moment of Science:

Support for Indiana Public Media Comes From

About A Moment of Science

Search A Moment of Science