SPACE PHOTOS THIS WEEK: Rare Clouds, Eclipse, More

SPACE PHOTOS THIS WEEK: Rare Clouds, Eclipse, More
<< Previous   3 of 5   Next >>
July 22, 2008—Wispy, "night shining" clouds float at an altitude of 250,000 to 280,000 feet (76 to 85 kilometers), lit by sunlight while much of Earth's lower atmosphere and horizon remain dark.

An astronaut captured this image in the pre-dawn hours as the International Space Station soared some 200 miles (321 kilometers) over western Mongolia.

Also called polar mesospheric clouds, night-shining clouds occur at high latitudes in each hemisphere. The transient phenomena aren't fully understood.

More Photos in the News
Today's Top 15 Most Popular Stories
Free Email Newsletter: "Focus on Photography"
—Image by NASA
 
NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS




 

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.