‘Snow-Cannon’ on Enceladus May Make Other Moons Shine
Nature & Science

‘Snow-Cannon’ on Enceladus May Make Other Moons Shine

The plumes of the Saturn moon Enceladus, captured spewing from the moon’s surface by NASA’s Cassini spacecraft from a distance of 9,000 miles (14,000 kilometers) in 2010. One new study suggests that Enceladus’ geysers act like a “snow-cannon” and makes Saturn’s inner moons more reflective. (Image: © NASA/JPL-Caltech) Enceladus seems to be acting like a…

Nature & Science

Review: Fire in the Sky

  by Jeff FoustMonday, September 16, 2019 Fire in the Sky: Cosmic Collisions, Killer Asteroids, and the Race to Defend Earth by Gordon L. Dillow Scribner, 2019 hardcover, 288 pp., illus. ISBN 978-1-5011-8774-2 US$27.00 Hardly a week goes by without some kind of story about an asteroid making a close approach—relatively speaking—to the Earth. While…

Could we intercept interstellar comet C/2019 Q4 Borisov?
Green Energy

Could we intercept interstellar comet C/2019 Q4 Borisov?

Artist’s impression of the first interstellar asteroid/comet, “Oumuamua”. This unique object was discovered on Oct. 19th, 2017, by the Pan-STARRS 1 telescope in Hawaii. Credit: ESO/M. Kornmesser When ‘Oumuamua passed through our solar system two years ago, it set off a flurry of excitement in the astronomical community. Here was the first-ever interstellar object that…

US Space Module Genesis II Might Crash into Relict Russian Satellite
Nature & Science

US Space Module Genesis II Might Crash into Relict Russian Satellite

The space habitat development company Bigelow Aerospace tweeted on Tuesday that two inoperative satellites, the US’s Genesis II and Russia’s Soviet-era Cosmos 1300, might collide. While the odds of a crash are only 5.6 percent, Bigelow Aerospace, the owner of Genesis II, says it’s another troubling sign that Earth’s orbit is becoming dangerously crowded. Bigelow…

The Most Massive Neutron Star has been Found. It’s ALMOST the Most Massive Neutron Star That’s Even Possible
Nature & Science

The Most Massive Neutron Star has been Found. It’s ALMOST the Most Massive Neutron Star That’s Even Possible

Neutron stars are the end-state of massive stars that have spent their fuel and exploded as supernovae. There’s an upper limit to their mass, because a massive enough star won’t become a neutron star; it’ll become a black hole. But finding that upper mass limit, or tipping point, between a star that becomes a black…