Lasteroide

Lasteroide is not a standard term in astronomy. In Spanish, the correct word for these small rocky bodies that orbit the Sun is asteroide. The form lasteroide may appear as a misspelling or in fictional contexts. This article uses asteroid as the conventional term and notes that such misspellings can occur in informal writing.

An asteroid is a small rocky or metallic body that orbits the Sun. Most lie in the main asteroid belt between Mars and Jupiter, but others are near-Earth asteroids, Mars-crossers, or Trojan co-orbitals. Sizes range from meters to hundreds of kilometers across.

Composition and classification: Asteroids are broadly categorized by composition into C-type (carbonaceous), S-type (silicaceous), and M-type (metallic), with many interlopers. Surfaces are diverse; many objects are irregularly shaped and may have moons. Rotation periods generally span a few hours to a day.

Origin and dynamics: They are remnants of the early solar system and fragments from past collisions. Orbits can be stable within the belt, but interactions with planets and resonances can create families, migrate objects inward, or eject them to different regions of the solar system.

Discovery, study and significance: Asteroids have been observed since the early 19th century and are cataloged by the IAU. Space missions such as Dawn, Hayabusa, Hayabusa2, and OSIRIS-REx have visited or sampled asteroids. They are scientifically valuable for understanding solar-system formation and are considerations in planetary defense and potential resource utilization.