Inside the asteroid was discovered the “germ” of the comet
Scientists from the University of Arizona found in the remains of an asteroid a small fragment of the comet.
April 17, 2019 at 12:07
Fragments of celestial bodies that survived the fall to Earth are called meteorites. They can be debris like comets and asteroids. These heavenly bodies originated billions of years in a gas-dust disk surrounding the young Sun, but since they were formed at different distances from it – they have different chemical composition. In particular, comets contain a larger fraction of water ice and much more carbon than asteroids.
In 2002, the Antarctic Lapaz ice field was found, the meteorite, named 02342 LaPaz Icefield (LAP 02342). It belongs to the chondrites, the most common subgroup in the classification of meteorites. 92,3% of the total number falling on the Ground of the heavenly bodies are chondrites.
However, LAP 02342 were unusual meteorite: it contained a small area, rich in carbon. Having studied the material using chemical and isotopic analyses, the researchers found that this “embryo” of the comet.
A fragment with a size of 1/10 mm originates from the Kuiper belt on the icy outskirts of the Solar system. With a history Dating back approximately 3.5 million years after the beginning of its formation, a tiny piece of the “building blocks of comets” began to approach the inner region of our planetary system. There he collided with a larger asteroid that formed near Jupiter, and he swallowed it. Failing to develop into comet, fragment after the collision, was imprisoned in the meteor shell and stayed there (like an insect frozen in amber).
This allowed the comet fragments to survive the passage through earth’s atmosphere, and science thanks for more information about the early Solar system. Let’s see how does a newborn planet.