On May 19, 2018, one of those orbiting stars, called S2, passed through Sagittarius A*’s gravitational field, providing scientists with a prime opportunity to study whether a phenomenon predicted by Einstein, dubbed gravitational redshift, takes place under the most extreme cases.

Amazon’s face surveillance technology is the target of growing opposition nationwide, and today, there are 28 more causes for concern. In a test the ACLU recently conducted of the facial recognition tool, called “Rekognition,” the software incorrectly matched 28 members of Congress, identifying them as other people who have been arrested for a crime.