Aug 30 - Finding ETs

August 30 Finding ETs by:

Good morning! Here's how Gaia could help find Dyson spheres You've heard of them? They're hypothetical megastructures - vast structures completely surrounding stars - built by extraterrestrials (ETs) for the purpose of harvesting all of a star's energy. Dyson spheres have long been popular in science fiction. But they might really exist. Here's how the European Space Agency's Gaia mission might help find one. Read more. Artists' concept of a Dyson sphere. Read more about this image. What is a Dyson sphere? Dyson spheres are back in the news. In case you've never heard of them - or want to brush up - here's a primer. Read more. Could ETs use star mergers to communicate? When 2 extremely dense neutron stars orbit each other closely, they spiral inward over time and eventually merge. Such mergers are powerful. Could advanced civilizations be using them to signal across the cosmos? Read more. Astronomers map a starburst galaxy Astronomers used the ALMA telescope in northern Chile to make the sharpest and clearest map yet of a distant starburst galaxy, where stars form 1,000 times faster than in our Milky Way. They're now calling this galaxy an unstoppable monster. Read more. The ALMA telescope array at night. Image via Babak Tafreshi/ESO.

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Hello, universe A composite image by Karthik Easvur‎. Thank you, Karthik!

Surfer riding a rainbow Josh Blash wrote this week: "I caught this surfer riding a rainbow after a storm moved off the New Hampshire coast." Thank you, Josh. Submit your photo to EarthSky here! Did a friend forward EarthSkyNews to you? Click here to get your own subscription!

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