AAS Dispatch: International Borders Are Visible From Space

This photo of Earth from the International Space Station was taken by NASA astronaut Ron Garan, who has been blogging about the planet's beauty on his website Fragile Oasis. This image, taken on April 15, 2011, was Garan's first photo sent via Twitter.
This photo of Earth from the International Space Station was taken by NASA astronaut Ron Garan, who has been blogging about the planet's beauty on his website Fragile Oasis. This image, taken on April 15, 2011, was Garan's first photo sent via Twitter. (Image credit: NASA via Ron Garan/Astro_Ron)

AUSTIN, Texas — It's a popular saying that international borders aren't visible from space, but it's just not true, says one veteran astronaut.

The political lines between countries are sometimes obvious from orbit in the form of environmental differences, said former NASA astronaut John Grunsfeld, who is now the associate administrator for NASA's Science Mission Directorate.

"Wealthy countries are lined in green and then you see the country next door that has no water," Grunsfeld said Wednesday (Jan. 11) at a NASA Town Hall here at the 219th meeting of the American Astronomical Society.

Divergences in the amount of electricity visible at night and forestation can also reveal national boundaries.

"The big thing is, no matter where I was on planet Earth, what you see is we are changing the planet," Grunsfeld said.

Grunsfeld flew on the space shuttle five times, including three visits to service the Hubble Space Telescope. Those missions spanned 14 years, providing Grunsfeld with ample time to observe humankind's growing impact on Earth.

He noticed more forest clearing, more dammed rivers, and fewer trees in places like Madagascar, he said.

"It's really very disturbing," Grunsfeld said.

The astronaut also busted another popular myth about viewing Earth from space — that the Great Wall of China is clearly visible.

"Personally with binoculars I could see no evidence of the Great Wall of China," Grunsfeld said.

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Clara Moskowitz
Assistant Managing Editor

Clara Moskowitz is a science and space writer who joined the Space.com team in 2008 and served as Assistant Managing Editor from 2011 to 2013. Clara has a bachelor's degree in astronomy and physics from Wesleyan University, and a graduate certificate in science writing from the University of California, Santa Cruz. She covers everything from astronomy to human spaceflight and once aced a NASTAR suborbital spaceflight training program for space missions. Clara is currently Associate Editor of Scientific American. To see her latest project is, follow Clara on Twitter.