4 天之前 · The Sun is a star. It is the biggest object in our solar system. The Sun is about 93 million miles away from Earth and about 4.5 billion years old. The Sun affects Earth’s weather, seasons, climate, and more. Let’s learn about how the Sun behaves. Why is the Sun warm and bright? The Sun is a giant ball made of hydrogen and helium gases.

3 天之前 · Both orbit closer to the Sun than Earth, with smaller, faster orbits than the other planets. Venus is visible for only a couple of months at a time when it reaches its greatest separation from the Sun (called elongation), appearing just after sunset or before sunrise. Mercury, completing its orbit in just 88 days, is visible for only a couple ...

5 天之前 · The Sun’s gravity holds the solar system together, keeping everything – from the biggest planets to the smallest particles of debris – in its orbit. The connection and interactions between the Sun and Earth drive the seasons, ocean …

NASA collects data on the Sun and its energy to understand how our closest star impacts Earth's energy fields, atmosphere, weather, and human activity.

2024年11月5日 · From our vantage point on Earth, the Sun may appear like an unchanging source of light and heat in the sky. But the Sun is a dynamic star, constantly changing and sending energy out into space. The science of studying the Sun and its influence throughout the solar system is called heliophysics.

2025年1月14日 · We can’t live without the Sun! Life on Earth depends on the Sun. Here are just a few reasons why: The Sun’s gravity holds our entire solar system together. Our solar system is even named after the Sun (the Latin word for Sun is “sol”). Heat from the Sun makes Earth warm enough to live on.

2024年6月20日 · The Sun wields a huge influence on Earth. Its gravity holds our planet in its orbit, and solar energy drives the seasons, ocean currents, weather, climate, radiation belts, and auroras on Earth. The solar wind, a flow of charged particles from the Sun, constantly bombards Earth’s magnetosphere, a vast magnetic shield around the planet.

It is Earth’s relationship to the sun, and the amount of light it receives, that is responsible for the seasons and biodiversity. The amount of sun a region receives depends on the tilt of Earth’s axis and not its distance from the sun.

Our Earth, orbiting 93 million miles away from the energetic star at the center of the Solar System, receives only one-half of one-billionth of the Sun's energy output. Mere crumbs! Yet those "crumbs" are enough to nourish and power the whole planet.

2024年8月20日 · As the Earth rotates, observers on Earth see the Sun moving across the sky from east to west with the beginning of each new day. We often say that the Sun is “rising” or “setting,” but it is the Earth’s rotation that gives us the perception of …