Using the Gran Telescopio Canarias in La Palma, the scientists studied a debris disc
orbiting a white dwarf 410 light years away, formed by the disruption of rocky bodies composed of elements such as iron, magnesium, silicon, and oxygen -- the four key building blocks of the Earth and most rocky bodies.
So, while Sefilian and his former professor Jihad Touma put forth this theory, and based it on the hypothesis that the solar system's debris disc
is about 10 times more massive than Earth, he did not entirely rule out "Planet Nine" either.
But life there would not be peaceful, as a massive debris disc
around the star, increases the chance of hits from asteroids and comets.
The system includes comets, orbiting gas clouds, and an enormous debris disc
that in our solar system would extend from Neptune's orbit to nearly 2,000 times the distance from the Earth to the sun.
They observed that the planet is not aligned with Beta Pictoris' (its star's) main debris disc
but is aligned to and potentially interacting with an inner warped component disc.
But just last year, British astronomer Jane Greaves and her colleagues discovered an enormous dust-laden debris disc
around Tau Ceti.
Because of the Herschel's sensitive far-infrared capabilities and its rich dataset, astronomers have been able to resolve bright emission around Kappa Coronae Borealis (CrB, or Kappa Cor Bor), indicating the presence of a dusty debris disc
Mark Wyatt from the University of Cambridge, lead author of the paper focusing on the debris disc
around 61 Vir.
These models indicate that the mass of the debris disc
around Jupiter, from which the moons formed, was several tens of a per cent of the mass of giant planet; And yet only 2 per cent is enough to make the moons we see today.
The latest insights into the formation and structure of our own 'Mark I' solar system, both planets and other smaller bodies, as well as many types of other planetary systems are to be found in chapters on protoplanetary and debris discs
, terrestrial planets and giant planets.
The debris discs
are remnants of the formation of the planets.
are composed of dust resulting from collisions among larger bodies like planetary embryos or asteroids.