Observations of remote cosmic explosions reveal that the outer spiral arms of the Milky Way might extend farther out than previously thought.
The post Gamma-Ray Bursts Size Up the Milky Way’s Spiral Arms appeared first on Sky & Telescope.
Astronomers have underestimated just how bright the low-frequency radio sky is, new measurements show.
The post Radio Astronomers Measure a Brighter Sky Than They Expected appeared first on Sky & Telescope.
New analysis reveals a tight relationship between two supernova remnants in the outer Milky Way.
The post Double Whammy: Binary Supernova in Gemini appeared first on Sky & Telescope.
A star-forming galaxy in the early universe might have sent a ghostly particle known as a neutrino crashing into the ice at Earth’s South Pole, after an 11 billion-year journey through space.
The post “Shadow Blaster” Galaxy Might Have Sent High-Energy Neutrino to Earth appeared first on Sky & Telescope.
From high-speed battering rams to gravity tractors, the technology exists to protect the planet. The question is whether humanity will act in time—and in concert.
The post How to Stop a Killer Asteroid appeared first on Nautilus.
Login