Final answer:
The orbits of light closer to the Sun than Earth's orbit are known as perihelion. Perihelion is the point in an orbit where a planet or satellite is closest to the Sun. Understanding the perihelion of Earth's orbit helps explain the variation in seasons and sunlight received on different parts of the Earth throughout the year.
Step-by-step explanation:
The orbits of light closer to the Sun than Earth's orbit are known as perihelion.
Perihelion is the point in an orbit where a planet or satellite is closest to the Sun. In the case of Earth, perihelion occurs in early January.
Understanding the perihelion of Earth's orbit helps explain the variation in seasons and sunlight received on different parts of the Earth throughout the year.