31 Oct '14, 2pm

Retreat of the Columbia Glacier #NASA

Retreat of the Columbia Glacier #NASA

View Image Comparison View Both Images Scientists have long studied Alaska's fast-moving Columbia Glacier, a tidewater glacier that descends through the Chugach Mountains into Prince William Sound. Yet the river of ice continues to deliver new surprises. When British explorers first surveyed the glacier in 1794, its nose extended to the northern edge of Heather Island, near the mouth of Columbia Bay. The glacier held that position until 1980, when it began a rapid retreat. The image series begins in July 1986 (bottom image) with a false-color image captured by the Thematic Mapper (TM) sensor on the Landsat 5 satellite. The false-color image from July 2014 (top image), acquired by the Operational Land Imager on the Landsat 8 satellite, shows the extent of retreat after 28 years. Use the image comparison tool to better see the details. Recent changes to the glacier include t...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=84630&s...

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米海軍の次期艦載機F-35CライトニングIIが、11月3日、空母ニミッツで空母へ初着艦した時の写真→ 

米海軍の次期艦載機F-35CライトニングIIが、11月3日、空母ニミッツで空母へ初着艦した時の...

navy.mil 04 Nov '14, 3am

PACIFIC OCEAN (Nov. 3, 2014) An F-35C Lightening II carrier variant Joint Strike Fighter conducts it's first arrested land...

Halloween History #NASA

Halloween History #NASA

earthobservatory.nasa.gov 01 Nov '14, 2pm

The last day of October—Halloween —is a popular holiday in North America and some parts of Europe. In Ireland, people cele...