Outer space - Wikipedia
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.
What Is Space? - A Definition of Our Universe and Beyond | Space
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 boundary at...
NASA/JPL Eyes - Solar System Interactive
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.
Solar System Exploration - Science@NASA
NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. The solar system has one star, eight planets, five dwarf planets, at least 290 moons, more than 1.3 million asteroids, and about 3,900 comets.
外层空间 - 维基百科，自由的百科全书
外层空间，亦称 外太空 、 宇宙 空间，简称 空间 、 外空 或 太空 （英語： outer space），指的是 地球 大氣層及其他 天體 之外的虛空區域。 與 真空 有所不同的是，外太空含有密度很低的物質，以 等離子態 的 氫 為主。 其中還有 電磁輻射 、 磁場 等。 理論上，外層空間可能還包含 暗物質 和 暗能量。 外太空與 地球大气层 並沒有明確的界線，因為大氣隨著 海拔 增加而逐漸變薄。 假設大氣層 温度 固定， 大氣壓 會由 海平面 的大約1013 毫巴，隨著高度增加而呈 指數化 減少至 …
Universe - NASA Science
NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. About NASA's Mission. Join Us. Home. News & Events. Multimedia. NASA+. Missions. Humans in Space.
Space exploration | History, Definition, & Facts | Britannica
6 天之前 · Space exploration, investigation, by means of crewed and uncrewed spacecraft, of the reaches of the universe beyond Earth’s atmosphere and the use of the information so gained to increase knowledge of the cosmos and benefit humanity. Learn more about space exploration in …
James Webb Space Telescope - NASA Science
Webb's Science Goals. The James Webb Space Telescope is a giant leap forward in our quest to understand the Universe and our origins. Webb is examining every phase of cosmic history: from the first luminous glows after the Big Bang to the formation of galaxies, stars, and planets to the evolution of our own solar system.
NASA Releases First Breathtaking Images Taken by James Webb Space …
2022年7月12日 · The deepest, sharpest infrared image ever captured of the distant universe reveals a tableau teeming with thousands of galaxies in the cluster SMACS 0723 as it appeared 4.6 billion years ago.
Hubble’s Grand Tour of the Outer Solar System - Science@NASA
2024年10月7日 · From its vantage point high above Earth’s atmosphere, NASA’s Hubble Space Telescope has completed this year's grand tour of the outer solar system – returning crisp images that complement current and past observations from interplanetary spacecraft. This is the realm of the giant planets – Jupiter, Saturn, Uranus, and Neptune ...