Sentences with phrase «cores of larger asteroids»

Iron meteorites, derived from the shattered cores of larger asteroids, reach Earth only rarely.

``... we lack compelling scenarios leading to the origin of iron meteorites... Early solar system collisions have been called upon to excavate this iron [from the cores of the largest asteroids], although numerical impact models have found this task difficult to achieve, particularly when it is required to occur many dozens of times, yet not a single time for asteroid Vesta.»

Not exact matches

These core samples contain bits of the original granite bedrock that was the unlucky target of cosmic wrath 66 million years ago, when a large asteroid struck Earth, blasted open the 180 - kilometer - wide Chicxulub crater, and led to the extinction of most life on the planet.

The model also showed that some asteroids would be muddy all the way through, while others would develop cores of larger grains, with a great mud ocean on top of them.

The meteorite is an achondrite, a relatively rare type of space rock that comes from a planet or big asteroid — something large that generated enough internal heat early in its history to melt partially, producing a metallic core surrounded by rock.