From youngest to oldest
Fetus Protostar
Infancy-Adulthood Fusion Ignition-Main sequence
Middleage Red Giant/Supergiant
Old age-Death White Dwarf/Black hole
Answer: 6.313 miles
Explanation:
The distance is calculated by Simple Rule of Three:

Answer:
The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets and small Solar System bodies.
Explanation:
Air mass, letter a is the correct one
Answer:
Core.
Explanation:
The core is magnetic and is the cause of the Poles and the magnetosphere.