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Earth's City Lights. This image of Earth's city lights was created with data from the Defense Meteorological Satellite Program (DMSP) Operational Linescan.
Table of contents
- Cities go dark for Earth Hour, bring light to climate change
- Cities at Night
- London, England, United Kingdom
- New Nighttime Map Shows Earth in Whole New Light
However, not all changes are a testimony of hope and development.
Cities go dark for Earth Hour, bring light to climate change
The island of Puerto Rico has dimmed significantly, as has Venezuela. Looking at the map, the struggling economies of these nations come conspicuously to mind. It simply might be due to a disparity in the time when imagery was captured, like a weekday versus a weekend, or winter versus summer. To really connect these changes with specific events or activities, one would actually need to get down to the pixel level and take parameters like the viewing angle into account.
Neighboring Iraq shows similar signs of conflict in the northwest, coupled with massive new illumination throughout the rest of the country.
Cities at Night
Powered by Awesomeness. LOG IN. Log into your account. Recover your password. Remote Sensing. Esri seeks to woo developers with new, affordable ArcGIS plans.
Now you can help NASA improve its global land cover maps. How 8 micro-satellites are unexpectedly trumping Landsat, Sentinel at flood detection.
London, England, United Kingdom
Subscribe to our newsletter. What is more speculative is the notion that such extraterrestrial life could have become technologically advanced, perhaps even well beyond our capacity. This idea has captured the imagination of the general public, giving birth to a rich collection of science fiction literature and blockbuster films. But it has also received serious attention from scientists, who have thought of ways to find and possibly contact these alien species.
New Nighttime Map Shows Earth in Whole New Light
In , radio astronomer Frank Drake used the then most powerful radio transmitter, at Arecibo in Puerto Rico, to broadcast a message into space announcing our presence. The message will now be 45 light years away from us. But impatient as scientists tend to be, more effort has gone into searching space for such signals transmitted by extraterrestrial civilisations.
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As more and more planets are discovered around other stars, the search for extraterrestrial intelligence — often abbreviated to SETI — is becoming more relevant, better informed and better resourced. Among the many solutions proposed for this problem, one really brings us down to Earth: aliens might be scared of other aliens.
While tempting, many scientists now agree that sending messages into space without knowing who might be intercepting them might not be such a good idea. Listening is much safer. But radio communication among ourselves — which includes navigation, television broadcasts and the internet — might also be detected from space.
Cities and roads outline the contours of continents, while oil platforms dot the seas and ships draw lines across the ocean. But we may fail, if aliens believe the smartest thing to do is to keep quiet and remain in the dark. We might never see aliens because "we'll accidentally destroy them" , an expert has warned. We pay for your stories!