2024年10月22日 · Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements. Every star has its own life cycle, ranging from a few million to …

2024年10月22日 · Hydrogen fusion begins moving into the star’s outer layers, causing them to expand. The result is a red giant, which would appear more orange than red. Eventually, the …

Local concentrations of matter have condensed into stars and galaxies. Intergalactic space takes up most of the volume of the universe, but even galaxies and star systems consist almost …

2025年2月5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 …

2023年12月20日 · Explore NASA's media galleries to view and download high-resolution images of the solar system, agency missions, and more. Discover the cosmos! Each day a different …

Explore the night sky with NASA's interactive star map and discover constellations, planets, and more.

2025年1月14日 · The space between the stars is filled with gas and dust – sometimes thick, sometimes thin, and often invisible unless illuminated. A cosmic spotlight in the form of a …

2022年7月12日 · The James Webb Space Telescope’s first images will be shared on Tuesday, including a nebula where stars are born, the color spectrum of an exoplanet and the …

2025年1月13日 · The researchers used NASA’s James Webb Space Telescope (JWST) to observe Westerlund 1, a so-called super star cluster with hundreds of very massive and …

2025年1月28日 · Smaller stars like our sun end their lives by ejecting their outer layers of gas into space over the course of about 10,000 years, leaving behind the star’s hot core — a white …