TOI-6894 b, the largest exoplanet relative to its host star yet seen, doesn’t fit the most widely accepted formation model ...

The first method is called core accretion, explains Ravit Helled, a professor of theoretical astrophysics at the University of Zürich. This starts with the birth of a new star, when molecular ...

One way, which we think is how Jupiter, Saturn, Uranus and Neptune formed, is via a process called core accretion. A giant planetary core, up to ten times the mass of Earth, ...

“There shouldn’t be enough solid material to form those objects out there through a core-accretion paradigm.” In the 1980s, astronomers proposed the idea that gravitational instability could ...

An analysis of Hawaii’s volcanic rocks revealed Earth’s core is leaking gold and other precious metals, a study found. The elements emerge when ocean islands form.

Space.com: A new twist in a long-standing debate might answer the fundamental question in the planet forming business: how to make gas giants like Jupiter and Saturn.

Edward added: "Given the mass of the planet, TOI-6894b could have formed through an intermediate core-accretion process, in which a protoplanet forms and steadily accretes gas without the core ...

However, this core accretion model does not work well at creating gas giants in either tight or very distant orbits from their stars. Nor is the accretion process itself well understood.

The mechanics are called "core accretion," and it seems to work best when the building materials are plentiful. But TOI-6894b seems to be playing by a different rulebook.

Exoplanets form in protoplanetary disks, a collection of space dust and gas orbiting a star. The leading theory of planetary formation, called core accretion, occurs when grains of dust in the ...