Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. [1] . It contains ultra-low levels of particle densities, constituting a near-perfect vacuum [2] of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fields and dust.

NASA’s Solar System Interactive (also known as the Orrery) is a live look at the solar system, its planets, moons, comets, and asteroids, as well as the real-time locations of dozens of NASA missions.

2025年1月2日 · Discover the universe: Learn about the history of the cosmos, what it’s made of, and so much more. Concentrations of matter with gravity so powerful not even light can escape. Collections of stars, planets, and vast clouds of gas and dust bound together by gravity. Worlds beyond our solar system.

Outer space, commonly shortened to space, is the near-vacuum between celestial bodies. [1] It is where all of the planets, stars, galaxies and objects are found. It is the expanse that exists beyond Earth and its atmosphere. On Earth, space begins at the Kármán line (100 km above sea level). [2]

Learn about the inner planets, the outer planets, and the dwarf planets. Our solar system has hundreds of moons, and they come in many shapes and sizes. Hyperion is the largest of Saturn’s irregularly shaped moons. Four Planets in One View!

2024年10月29日 · About 8,000 miles (12,800 kilometers) below your feet — on the opposite side of Earth — lurks the unforgiving vacuum and radiation of outer space. In fact, you’re technically in space right now.

2022年2月17日 · From our Earth -bound perspective, outer space is most often thought to begin about 62 miles (100 kilometers) above sea level at what is known as the Kármán line. This is an imaginary...

2023年5月24日 · The term outer space refers to anything beyond Earth, even things very close to home in low-Earth orbit, which begins as low as 100 miles (160 kilometers) above the planet.

Explore the 3D world of the Solar System. Learn about past and future missions.

Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fields and dust.