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 …
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 | Uranus – NASA Solar System Exploration
The seventh planet from the Sun with the third largest diameter in our solar system, Uranus is very cold and windy. The ice giant is surrounded by 13 faint rings and 27 small moons as it rotates at a nearly 90-degree angle from the plane of its orbit.
Comet Hale-Bopp - NASA Solar System Exploration
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. In fact, Comet Hale-Bopp was at magnitude 0 or brighter for an astounding 8 weeks, the …
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 pebbly, granular surface of the sun, the photosphere, is where early astronomers focused most of their attention, because it is here that we find the easily observed blotches that are now called sunspots.
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.
Genesis : Search for Origins | Science - Solar Wind, Genesis, and …
The sun is in the middle of its life cycle, and will be heating and lighting the planets for billions of years to come. Fusion chemistry as described above forms the basis of the Standard Solar Model, an explanation of the sun's composition and functioning used by Genesis scientists in their design of solar wind collection devices.
The Genesis spacecraft journeyed toward the Sun. It went to a place outside the Earth's magnetic field where the Earth and Sun gravities are balanced. While in orbit, the spacecraft bathed in solar wind that is flung out from the Sun. Solar wind particles are similar to material from which the planets formed, and are atoms, ions,
Planet Compare – NASA Solar System Exploration
2024年11月20日 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.