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.

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。

Feb 5, 2025 · Captured by Hubble, HOPS 150 and HOPS 153 exist within environments shaped by powerful forces. But these stars release energy that reshapes the space around them, carving out new paths in their cosmic neighborhoods as a reminder that transformation is possible and driven by persistence and light. Learn More

5 days ago · Learn about the inner planets, the outer planets, and the dwarf planets. Explore the Planets

Jan 31, 2025 · The SPHEREx space telescope will shed light on a cosmic phenomenon called inflation. In the first billionth of a trillionth of a trillionth of a second after the big bang, the universe increased in size by a trillion-trillionfold. Called inflation, this nearly instantaneous event took place almost 14 billion years ago, and its effects can be ...

Oct 29, 2024 · Day or night, whether you’re indoors or outdoors, asleep, eating lunch or dozing off in class, outer space is just a few dozen miles above your head. It’s below you too. 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.

Other extreme environments include deserts, the deep sea, high mountains, the upper atmosphere, and outer space. 来自 Cambridge English Corpus The composition of our planet …

Feb 17, 2022 · 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...

Jan 22, 2025 · The Outer Space Institute (OSI) is a network of world-leading space experts united by their commitment to highly innovative, transdisciplinary research that addresses grand challenges facing the continued use and exploration of space.

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.