Tag: Stars and Galaxies

A Fresh View of an Increasingly Familiar Black Hole

Chin@Strategy

A patch of pure nothing in a faraway galaxy has lately become the gravitational center of attention for radio astronomers. That would be a giant black hole, with the gravity of 6.5 billion suns, that spits high-energy particles from the center of the galaxy Messier 87, which lies some 50 million light-years from Earth. In 2019, astronomers operating a network of radio telescopes known as the Event Horizon Telescope dazzled the world by producing a radio map of the entity — the first-ever image of a black hole. It showed…

A Chinese Telescope Did Not Find an Alien Signal. The Search Continues.

Chin@Strategy

It was a project that launched a thousand interstellar dreams. Fifty years ago, NASA published a fat, 253-page book titled, “Project Cyclops.” It summarized the results of a NASA workshop on how to detect alien civilizations. What was needed, the assembled group of astronomers, engineers and biologists concluded, was Cyclops, a vast array of radio telescopes with as many as a thousand 100-meter-diameter antennas. At the time, the project would have cost $10 billion. It could, the astronomers said, detect alien signals from as far away as 1,000 light-years. The…