Planetesimals (/ˌplænɪˈtɛsɪməlz/) are solid objects thought to exist in protoplanetary disks and debris disks. Believed to have formed in the Solar System...

possible. The grains eventually may coagulate into kilometer-sized planetesimals. If the disk is massive enough, the runaway accretions begin, resulting...

The Chamberlin–Moulton planetesimal hypothesis was proposed in 1905 by geologist Thomas Chrowder Chamberlin and astronomer Forest Ray Moulton to describe...

or other body in orbit around a star interacts with a disk of gas or planetesimals, resulting in the alteration of its orbital parameters, especially its...

probably not the source of the Late Heavy Bombardment. According to one planetesimal simulation of the establishment of the planetary system, the outermost...

these planetesimal encounters shift (migrate) the orbits of the planets by significant amounts. This process continues until the planetesimals interact...

SDSS J1228+1040 b is a disputed extrasolar planetesimal orbiting the white dwarf SDSS J1228+1040. It was discovered in 2019 using the variable calcium...

particles, ranging from centimeters up to meters in diameter, into planetesimals in a protoplanetary disk that is enhanced by aerodynamic drag from the...

interactions with planetesimals originating in an outer disk drive a slow divergent migration of the giant planets. This planetesimal-driven migration...

kilometer-sized planetesimals that gravitationally perturb each other's orbits and collide, gradually coalescing into the dominant planets. A planetesimal is an...

streaming instability is a hypothetical mechanism for the formation of planetesimals in which the drag felt by solid particles orbiting in a gas disk leads...

The Solar System has unique planetesimal systems, which led the planets to have near-circular orbits. Solar planetesimal systems include the asteroid...

pancake or ring-shaped accretion disk of matter composed of gas, dust, planetesimals, asteroids, or collision fragments in orbit around a star. Around the...

planets, and, indeed, a large number of planetesimals formed there. As with the terrestrials, planetesimals in this region later coalesced and formed...

dust (including primordial nuclides). According to nebular theory, planetesimals formed by accretion, with the primordial Earth being estimated as likely...

below) Ring system Trans-Neptunian objects Small Solar System body Comets Planetesimal Contact binary Sun Planets Mercury Venus Earth – Moon Mars – moons Jupiter...

mass to form ever-larger bodies. Local concentrations of mass known as planetesimals form, and these accelerate the accretion process by drawing in additional...

resonance chain is broken, the five giant planets undergo a period of planetesimal-driven migration, followed by a period of orbital instability with gravitational...

sailboat changing directions (tacking) as it travels against the wind. The planetesimal disk is truncated at 1.0 AU by Jupiter's migration, limiting the material...

be imaged around another star. In addition to the presence of several planetesimal belts and cometary activity, there are indications that planets have...

primordial planetesimal disc. While Neptune's orbit was highly eccentric, its mean-motion resonances overlapped and the orbits of the planetesimals evolved...

Comets Damocloids Meteoroids Minor planets names and meanings moons Planetesimal Planetary orbit-crossing minor planets Mercury Venus Earth Mars Jupiter...

The Transiting Planets and Planetesimals Small Telescope (TRAPPIST) is the corporate name for a pair of Belgian optic robotic telescopes. TRAPPIST–South...

gravitational encounters between planets, the disruption of an outer planetesimal disk, and the migrations of the outer planets to new orbits. However...

been further developed using intensive numerical simulations to study planetesimal accumulation. It is now accepted that stars form by the gravitational...

J.; Bizzarro, M.; Wittig, N.; Connelly, J.; Haack, H. (2005). "Early planetesimal melting from an age of 4.5662 Gyr for differentiated meteorites". Nature...

Self-gravitational forces are also significant in the formation of planetesimals and indirectly the formation of planets, which is critical to understanding...

Puna'auia (202773) (541566) Tiki TRAPPIST 1 I40 Transiting Planets and Planetesimals Small Telescope (TRAPPIST); TRAPPIST Cégep de Trois-Rivières Observatory...

asteroid belt formed from the primordial solar nebula as a group of planetesimals, the smaller precursors of the protoplanets. However, between Mars and...

7 Iris is a large main-belt asteroid and possible remnant planetesimal orbiting the Sun between Mars and Jupiter. It is the fourth-brightest object in...