Mercury, Venus, Earth, the Moon, and Mars

Most of the solid planets and their moons experienced this during their histories.

The first space mission to study the Trojans.

The science of obtaining information about objects or areas from a distance.

Formed as molten droplets before being accreted to their parent asteroid.

The accumulation of particles into a massive object by gravitationally attracting more matter.

The absence of impact craters on a planet's surface indicate this.

The first space mission to visit the dwarf planet Ceres.

Sensors that respond to external stimuli and record natural energy that is reflected or emitted from a planet's surface.

The intermediate zone of a planet located between the crust and core.

The result of the transfer of a projectile's kinetic energy.

Large scale deformation that produces the structure or architecture of a planet's lithosphere.

The only spacecraft to have visited the two ice giants: Jupiter and Saturn?

Composed of a rectangular array of pixels representing a measurement made by a satellite instrument.

Rocky objects orbiting the Sun.

The process of separating out different parts of a planetary body as a result of their physical or chemical behavior.

Eruptions of water producing vast thin sheets of ice.

The first space mission to explore the dwarf planet Pluto.

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Small celestial bodies, primarily made of dust and ice, that orbit the Sun.

The rigid, outermost shell of a terrestrial-type planet.

The dominant landform of the planets.

This probe parachuted to Titan making the first landing on a moon in the outer solar system.

These are created using remotely sensed data to make visual representations.

A large body of matter in orbit around the sun or a star and thought to be developing into a planet.