wunder beta☀️ The Sun
Our nearest star: the giant ball of fire that lights up our days!
What you’ll learn
- Explain that the Sun is a star made of hot gas, and describe its size, age, and distance from Earth.The Sun is the closest star, a huge ball of hydrogen and helium gas about 4.6 billion years old. It is around 93 million miles away, and its light takes about eight minutes to reach us.
- Describe how the Sun gives Earth light, warmth, and energy, and explain what causes day and night.The Sun provides the light, warmth, and energy that make life on Earth possible, powering plants through photosynthesis. Day and night happen because the spinning Earth turns toward and away from the Sun.
Questions this course answers
What is the Sun?
The Sun is a star, the closest one to Earth, which is why it looks so big and bright.
What is the Sun mostly made of?
The Sun is a giant ball of hot gas made mostly of hydrogen and helium.
About how long does the Sun's light take to reach Earth?
Light takes about eight minutes to travel the 93 million miles from the Sun to Earth.
What would happen to Earth without the Sun?
Without the Sun's light and warmth, Earth would be a frozen, dark place with no life.
How do plants use the Sun?
Plants catch sunlight in their leaves to make their own food in a process called photosynthesis.
What really causes day and night?
Earth spins once about every 24 hours, so the side facing the Sun has day and the other has night.
Grounded in trusted sources
- NASA Science: Sun Facts (science.nasa.gov/sun/facts)
- NASA Space Place: All About the Sun (spaceplace.nasa.gov/all-about-the-sun)
- Britannica Kids: Sun (kids.britannica.com/kids/article/Sun/353824)
- National Geographic Kids: The Sun (kids.nationalgeographic.com)
Every Wunder lesson is built from real, reputable sources — never invented.
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