SOLAR SYSTEM

Detailed explanation-1: -Rocky planets, like Earth, formed near the Sun, because icy and gaseous material couldn’t survive close to all that heat. Gas and icy stuff collected further away, creating the gas and ice giants.

Detailed explanation-2: -Because only metal and rock could condense in the inner solar system, while ice also condensed in the outer solar system.

Detailed explanation-3: -12. Planetary systems begin their lifecycles as large spinning disks of gas and dust that consolidate over the course of a few million years or so. Most of the gas accretes into the star at the center of the system, while solid material slowly coalesces into asteroids, comets, planets, and moons.

Detailed explanation-4: -The temperature of the solar nebula was too hot for water ice to exist and Earth was too small to hold onto a substantial atmosphere of hot gases.

Detailed explanation-5: -Gas giants could get their start in the gas-rich debris disk that surrounds a young star. A core produced by collisions among asteroids and comets provides a seed, and when this core reaches sufficient mass, its gravitational pull rapidly attracts gas from the disk to form the planet.