SOLAR SYSTEM

Detailed explanation-1: -One AU, about 93 million miles (150 million kilometers), represents the average distance from the Sun to the Earth. It would take an airliner more than 20 years to fly that distance-and that’s just a one-way ticket.

Detailed explanation-2: -Aphelion always happens in early July. About two weeks after the June solstice, Earth is farthest from the Sun. Perihelion always happens in early January. About two weeks after the December Solstice, Earth is closest to the Sun.

Detailed explanation-3: -Our Sun is a 4.5 billion-year-old star – a hot glowing ball of hydrogen and helium at the center of our solar system. The Sun is about 93 million miles (150 million kilometers) from Earth, and without its energy, life as we know it could not exist here on our home planet.

Detailed explanation-4: -The sun, an average, middle-aged star, provides the Earth with light, warmth and energy even though it’s 150 million kilometers (93 million miles) distant. What makes the sun so bright is its power source: a process called nuclear fusion, which yields abundant energy.

Detailed explanation-5: -Astronomers use the distance between Earth and sun, which is 93 million miles, as a new unit of measure called the Astronomical Unit.