Two decades after the Columbia disaster, is NASA’s safety culture fixed?

BOS Planet on Instagram: "4 billion light years away, this gigantic cluster of galaxies barely represents 5% of the total mass of this region. #bosplanet What you’re looking at is @NASAWebb image of the Pandora’s Cluster. This mega-cluster formed through multiple collisions and now contains ~500 galaxies. With an average of 250 billion stars each, that’s roughly 125 trillion stars bound together in one cosmic structure. But here’s the wild part — most of its mass isn’t even stars. About 75% is d