Fourth Industrial Revolution

6 man-made structures visible from space

The galaxy cluster SDSS J1038+4849 is pictured in this undated handout image taken with the NASA/ESA Hubble Space Telescope. As a result of the phenomenon of gravitational lensing, it seems to be smiling. In the case of this "happy face"?, the two eyes are very bright galaxies and the smile lines are actually arcs caused by strong gravitational lensing. Galaxy clusters are the most massive structures in the Universe and exert such a powerful gravitational pull that they warp the spacetime around them and act as cosmic lenses which can magnify, distort and bend the light behind them. This phenomenon, crucial to many of Hubble's discoveries, can be explained by Einstein's theory of general relativity.

These images from the International Space Station show some the man-made structures visible from space. Image: REUTERS/NASA/Handout via Reuters

Ali Sundermier
Science Reporter, Business Insider
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The Great Pyramids of Giza from space
Image: NASA
City lights at night from space
Image: NASA
The Kennecott Copper Mine from space
Image: NASA
Bridges from space
Image: NASA
Palm islands in Dubai from space
Image: NASA
The Greenhouses at Almería from space
Image: NASA
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