Perseverance’s ‘sky crane’ captures Mars descent

NASA’s Perseverance Rover Sends Sneak Peek of Mars Landing

The Coronavirus Is Here to Stay--Here's What That Means

Astronomers publish map showing 25,000 supermassive black holes. The new map was created by combining 256 hours of observations of the northern sky. The researchers deployed supercomputers with new algorithms that correct the effect of the ionosphere every four seconds.