Answer: The Sun is the most significant object to us here on Earth. The Earth would be an ice-covered rock ball without the Sun's heat and light.
Explanation: The Sun heats our oceans, agitates our atmosphere, creates our weather patterns, and supplies energy to the expanding green plants that sustain life on Earth by producing food and oxygen. The Moon does not emit light, therefore if it were already dark on our side of the planet, we would notice it abruptly disappear. Only because sunlight reflects off of the Moon can we see it. The Moon would vanish as the sunlight that was illuminating it did. All photosynthesis on Earth would cease if the Sun's rays were to disappear. All living things that depend on plants for food, including humans, will eventually perish along with all plants. While some resourceful people might be able to live without the Sun for a few days, weeks, or even years, it would eventually become impossible to sustain life on Earth.