17 Apr '11, 10pm

Bassas da India in Sunglint [image] #NASA

Bassas da India in Sunglint [image] #NASA

The vantage point on the International Space Station provides astronauts with many dramatic views of Earth. Occasionally those views become spectacular. This photograph of the Bassas da India, an uninhabited atoll in the Indian Ocean, has an almost surreal quality due to varying degrees of sunglint. Sunglint is caused by light reflecting off a water surface directly back towards the observer. Variations in the roughness of the water surface—the presence or absence of waves due to wind and currents—will cause differences in the intensity of the sunglint. The presence of other materials, such as oils or surfactants, can also change the properties of the water surface. In this image, the presence of currents is highlighted as darker patches or streaks (image left and upper right). In contrast, shallow water in the lagoon presents a more uniform, mirror-like appearance, sugges...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=50126&s...

Tweets

Islands off the Croatian Coast [image] #NASA

earthobservatory.nasa.gov 16 Apr '11, 10pm

Along the coast of Croatia lies a multitude of islands of varying shapes and sizes. Archaeological finds indicate that som...

NASA image reveals extent of 2010 Amazon drought ~ @mongabay

NASA image reveals extent of 2010 Amazon drough...

news.mongabay.com 17 Apr '11, 7pm

From NASA: image from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite, the image shows...

Earth's Magnetosphere [image] #NASA

earthobservatory.nasa.gov 22 Apr '11, 10pm

You've seen the pattern in science class when you laid bits of iron around a bar magnet. The invisible force field around ...

#climate For Energy-Starved India, Japan's Cris...

green.blogs.nytimes.com 17 Apr '11, 3pm

Reuters A billboard in Madhban, India, not far from the site of a planned nuclear power plant, depicts Japan’s nuclear dis...

For Energy-Starved India, Japan's Crisis Raises...

green.blogs.nytimes.com 17 Apr '11, 5pm

Reuters A billboard in Madhban, India, not far from the site of a planned nuclear power plant, depicts Japan’s nuclear dis...

Islands off the Croatian Coast via @BreakingSci...

earthobservatory.nasa.gov 16 Apr '11, 10pm

Along the coast of Croatia lies a multitude of islands of varying shapes and sizes. Archaeological finds indicate that som...

Green: For Energy-Starved India, Japan's Crisis...

green.blogs.nytimes.com 17 Apr '11, 2pm

Reuters A billboard in Madhban, India, not far from the site of a planned nuclear power plant, depicts Japan’s nuclear dis...

For Energy-Starved India, Japan's Crisis Raises...

green.blogs.nytimes.com 17 Apr '11, 1pm

Reuters A billboard in Madhban, India, not far from the site of a planned nuclear power plant, depicts Japan’s nuclear dis...

La magnetosfera de la Tierra

earthobservatory.nasa.gov 22 Apr '11, 10pm

You've seen the pattern in science class when you laid bits of iron around a bar magnet. The invisible force field around ...

How would you like to win a trip to India to blog for World Environment Day 5 June 2011? #WED2011

How would you like to win a trip to India to bl...

unep.org 22 Apr '11, 7pm

‘Green bloggers: win a trip to India to cover World Environment Day 2011, on June 5!’ How would you like to win a trip to ...

NASAの画像:ちょうど1年前の4月に公開された写真。Solar Dynamics Observatoryという新しいミッションからの太陽の写真。左下の白丸は地球のサイズでとっても小さい!

NASAの画像:ちょうど1年前の4月に公開された写真。Solar Dynamics Obser...

earthobservatory.nasa.gov 20 Apr '11, 3am

On April 21, 2010, NASA released the first-light images from its newest sun-monitoring mission, the Solar Dynamics Observa...

Elevation Map of Badain Jaran Desert [image] #NASA

Elevation Map of Badain Jaran Desert [image] #NASA

earthobservatory.nasa.gov 19 Apr '11, 10pm

Spread sand on an even surface so that the layer is perfectly flat. You might think that gravity should keep the layer eve...

Image via Sprint

treehugger.com 18 Apr '11, 3pm

, "For those who are dedicated environmentalists or just interested in finding some simple yet meaningful ways to begin li...

Graphic: 2010 Drought in the Amazon Forest @NAS...

earthobservatory.nasa.gov 15 Apr '11, 10pm

The measurement of vegetation over tropical forests can be tricky. The vegetation index is made by combining the visible a...