We expected it to be cometary, because the planetesimals
ejected from forming planetary systems should (we think) consist mostly of icy material.
The star may be actively destroying the planets and planetesimals
in orbit around it and then consuming the remains.
In this ambitious research programme i will answer these three key questions:how does the dust size distribution affect the evolution of ice lines and initial formation location of planetesimals
How do growing planets migrate in protoplanetary discs How does the disc evolution affect the formation and composition of planetary systemsi will tackle these questions using a combination of novel ideas and computer simulations in which i will model the three before mentioned connected key stages of planet formation.
The main belt contains vast numbers of irregularly shaped asteroids, also known as planetesimals
, orbiting the Sun between Mars and Jupiter.
The discovery was made using Europe's Transiting Planets and Planetesimals
Small Telescope, or TRAPPIST, located at the La Silla Observatory in Chile.
The researchers used the Transiting Planets and Planetesimals
Small Telescope (TRAPPIST) to find the three Earth-like planets.
It's the perfect recipe if you want to form planets or planetesimals
," said Isella, of Rice University in Houston.
The current leading theory for planetary formation is the core-accretion model, in which a heavy element core is built by the accretion of planetesimals
When these burnt-out cores of former stars gobble up shredded rocky debris from planetesimals
or asteroids (the building blocks of planets like the Earth), that material changes the light of the star that we observe in such a way that we can work backwards and uncover the actual chemical composition of the in-falling rocks.
On the history of lunar impact cratering: The absolute time scale and the origin of planetesimals
When these burntout cores of former stars gobble up shredded rocky debris from planetesimals
or asteroids (the building blocks of planets like the Earth), that material changes the light of the star that we observe in such a way that we can work backwards, and uncover the actual chemical composition of the infalling rocks.
As Jupiter moved inward, however, gravitational perturbations from the giant planet would have swept the inner planets (and smaller planetesimals
and asteroids) into close-knit, overlapping orbits, setting off a series of collisions that smashed all the nascent planets into pieces.