carbonaceous chondrites – Astronomy Now

Sodium jets may explain asteroid Phaethon’s comet-like brightening

17 August 2021 Astronomy Now

When does an asteroid behave like a comet? Perhaps when sub-surface sodium heats up and fizzes into space during a close pass by the Sun.

Dinosaur-killing impactor likely came from outer asteroid belt

9 August 2021 Astronomy Now

Modelling suggests the impactor believed to have triggered the mass extinction that wiped out the dinosaurs likely originated in the outer asteroid belt.

New clues to dwarf planet Ceres’ bright spots and origins

9 December 2015 Astronomy Now

The surface of Ceres, whose average diameter is 584 miles, is generally dark and similar in brightness to fresh asphalt. But the dwarf planet does possess 130 mysterious bright areas associated with impact craters that new research suggests are salt-rich areas left behind when briny water-ice from a subsurface layer sublimated in the past.