space
How much should we worry about asteroids?
Astronomers have found an estimated 40% of the near-Earth asteroids that are 140 m and larger. You do the math.
The saved and the damned of Proxima Centauri B
How might Christianity work intelligent alien life into their worldview? Did everyone get a Jesus?
Nuclear panic and the satellite wars
Reading Time: 6 minutes In 1962, the US detonated a high-altitude warhead, with a yield of 1.4 megatons of TNT equivalent, some 250 miles above the Earth. The blast expelled the planet’s magnetic field for nearly half a minute, created a brief cavity in the ionosphere, and damaged
NASA’s Artemis: A big step in sending humans to Mars
Reading Time: 5 minutes When NASA’s ambitious Artemis I project rocket—the agency’s most powerful launch vehicle ever—blasted into space from Florida’s Kennedy Space Center on November 16, scarcely more than a century ago automobiles and airplanes were still in their cradles. In a historical blink o
A dry run to save the planet: NASA DART probe closing in on asteroid impact
Reading Time: 6 minutes NASA’s DART spacecraft will crash into an asteroid on September 26, the first real-life test of planetary defense techniques.
Look up or don’t look up: We probably won’t see the one that gets us
Reading Time: 3 minutes OnlySky · Look up or don’t look up—We probably won’t see the one that gets us | Dale McGowan Our planet is tracing an elliptical orbit around a middle-aged star in the outer arm of an average galaxy. It’s been doing that for six billion years and will continue doing that for