The Shaft Scene in the Lascaux Caves in France. It features a dying man and several animals. Researchers now say this ancient cave art might commemorate a comet strike around 15,200 BC. Image via Alistair Coombs.
Researchers have learned that - as far back as 40,000 years ago - cave-dwellers in what's now Turkey, Spain, France and Germany used a method of date-keeping based on the stars. Some of their cave paintings aren't just depictions of wild animals. Instead they represent constellations in the night sky. Read more.
Peering into the heart of the Coma cluster of galaxies, the Hubble Space Telescope captured a whopping 22,426 globular star clusters, scattered among Coma's 1,000 galaxies. Astronomers say these scattered globular clusters might help them map dark matter. Read more.
Twenty-five years ago this week, NASA held its collective breath as 7 astronauts on space shuttle Endeavour caught up with the Hubble Space Telescope 353 miles (568 km) above Earth. Their mission: to fix a devastating flaw in the telescope's primary mirror. Read more.
We weren't sure if any of you would catch Mercury so near the sunrise glare. But you did! This photo is from our friend Lunar 101-Moon Book. We're expecting more Mercury photos. Here's why.
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