The origin of a comet is usually from?

Jan Hendrik Oort proposed a significant theory in 1950 suggesting that comets originate from a vast, spherical cloud of icy and rocky material located about a light-year away from the Sun, now known as the Oort Cloud. This theory remains widely accepted today and beautifully explains why comets appear from all directions in space rather than just along the planetary plane. The Oort Cloud is thought to be a spherical distribution of icy objects orbiting our Sun at distances between 3,000 and 100,000 AU — never directly observed but strongly supported by comet orbit data. When passing stars or galactic forces disturb these icy objects, they fall inward toward the Sun, becoming the comets we see.

• What Is the Oort Cloud: A spherical distribution of icy objects orbiting the Sun at distances between 3,000 and 100,000 AU — never directly observed but strongly supported by evidence
• Long-Period Comets: Newly discovered comets typically have aphelia near 50,000 AU — more than a thousand times farther than Pluto
• Short-Period Comets: Originate from the Kuiper Belt, not the Oort Cloud — an important distinction students must remember
• Population: Astronomers estimate there are about a trillion (10¹²) comets in the Oort Cloud
• Proposed by: Dutch astronomer Jan Oort in 1950 — hence the name Oort Cloud