In Depth | Sun – NASA Solar System Exploration
The Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star. Without the Sun’s energy, life …
The Sun By the Numbers – NASA Solar System Exploration
2024年11月20日 · The Sun is the star at the heart of our solar system. Its gravity holds the solar system together, keeping everything – from the biggest planets to the smallest bits of debris – in its orbit.
In Depth | Our Solar System – NASA Solar System Exploration
Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids.
In Depth | Mars – NASA Solar System Exploration
The fourth planet from the Sun, Mars is one of Earth's two closest planetary neighbors (Venus is the other). Mars is one of the easiest planets to spot in the night sky – it looks like a bright red point of light.
10 Need-to-Know Things About Jupiter - NASA Solar System …
Jupiter orbits about 484 million miles (778 million kilometers) or 5.2 Astronomical Units (AU) from our Sun (Earth is one AU from the Sun).
In Depth | Earth – NASA Solar System Exploration
Our home planet is the third planet from the Sun, and the only place we know of so far that’s inhabited by living things. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface.
The star nearest to the planet Earth is the sun. The sun’s diameter is 1.4 million kilometers and its distance from Earth is 150 million kilometers. But what do numbers that big really mean? To get an idea of size, use a grapefruit to represent the sun. Set it down and walk a dozen steps away. Turn around and
Genesis : Search for Origins | JPL | NASA
The sun's energy is manifested in the form of short wavelength gamma rays, which can be regarded as tiny packets of energy called photons, the particle component of electromagnetic radiation.
Comet Hale-Bopp - NASA Solar System Exploration
It reached perihelion (closest distance to the Sun) on April 1, 1997 at 0.914 AU. The comet did not pass particularly close to either the Sun or the Earth, but because of its rather large size, the comet was very bright and reached a peak magnitude of about -1.
Genesis : Search for Origins | JPL | NASA - NASA Solar System …
A History of Our Understanding of the Sun - A Closer Look. Pre-Twentieth Century Western Knowledge of the Sun. Ancient cultures, such as the Aztecs, the Mayans, the Hebrews, and the Egyptians, made careful observations of the motion of the sun through the sky.