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NASA's Lucy probe is set to fly on April 20, 2025

NASA's Lucy probe is scheduled to make a significant flyby of the asteroid Donaldjohanson on Easter Sunday, April 20, 2025. Here are some detailed aspects of this mission: Mission Objectives: The Lucy mission aims to study the Trojan asteroids, which are believed to be remnants from the early solar system. By examining these asteroids, scientists hope to gain insights into the formation and evolution of the solar system. Asteroid Donaldjohanson: Named after paleontologist Donald Johanson, who discovered the famous Australopithecus fossil "Lucy," this asteroid orbits the Sun in a region known as the L4 Trojan camp, situated ahead of Jupiter in its orbit. It is one of the many Trojan asteroids that are thought to contain primitive materials. Flyby Details: During the flyby, Lucy will use its suite of scientific instruments to gather data about Donaldjohanson's surface composition, geology, and morphology. The close encounter will allow for high-resolution im...

Not so fast, supernova: Highest-energy cosmic rays detected in star clusters

The highest-energy cosmic rays come from subatomic interactions within star clusters, not supernovae, say physicists. For decades, researchers assumed cosmic rays are flung into space from supernova. But new research suggests even supernovae are not strong enough to push particles to petaelectronvolts (PeVs). Instead, the researchers posit that star clusters like the Cygnus Cocoon serve as PeVatrons capable of moving particles at such high energy rates.

from Space & Time News -- ScienceDaily https://ift.tt/3l5C39P

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