Sun or Moon?

The Sun is a G-type main-sequence star located about 93 million miles (150 million kilometers) from Earth, an average distance light covers in roughly 8 minutes and 20 seconds. Its core fuses about 600 million tons of hydrogen into helium every second, generating energy that radiates outward at a surface temperature near 5,500°C (9,932°F) and reaches a staggering 15 million°C in the core. The Sun accounts for 99.86 percent of the mass in our solar system and drives Earth's climate, weather patterns, ocean currents, and photosynthesis. Without it, life as we know it could not exist. Solar exposure also triggers vitamin D synthesis in human skin, and ancient civilizations from the Egyptians (Ra) to the Aztecs (Huitzilopochtli) worshipped solar deities. The Sun is approximately 4.6 billion years old and is expected to remain in its current stable phase for another 5 billion years before evolving into a red giant.

The Moon is Earth's only natural satellite, sitting about 238,855 miles (384,400 km) away, and orbiting our planet roughly every 27.3 days. Most scientists support the giant-impact hypothesis: about 4.5 billion years ago, a Mars-sized body called Theia collided with the young Earth, ejecting debris that coalesced into the Moon. Its gravitational pull is the primary driver of ocean tides, and it stabilizes Earth's axial tilt, helping create stable seasons. The Moon shows phases because we see different portions of its sunlit half as it orbits. Humans first walked its surface on July 20, 1969, when Neil Armstrong and Buzz Aldrin landed via Apollo 11. The Moon influences calendars, festivals, and folklore worldwide, from the Chinese Mid-Autumn Festival to Ramadan.