A thick layer of haze around the ultra-low-density planet Kepler-51d likely obscures not only the strange planet's ...

In an unprecedented leap forward in our understanding of the universe’s origins, NASA’s James Webb Space Telescope (JWST) has potentially identified the earliest galaxy ever observed. This galaxy ...

小行星2024 YR4在2024年末被智利的ATLAS巡天系统发现。刚发现时，轨道观测还很稀疏，断断续续的“目击记录”让轨道解算出现不确定区间——科学家们算出了一条“可能会擦过月球”的轨迹，统计上的撞击概率一度达到4.3%。这类早期的不确定并不罕见：当观测弧短、天体又变暗难以继续追踪时，轨道解算会留出较大的可能区域。

Europa is not supposed to look the way it does. Jupiter's icy moon is scarred by a chaotic patchwork of fractured terrain, ...

Initially, much uncertainty surrounded the flight path of the space rock known as 2024 YR4, a small asteroid that has ...

NASA’s James Webb Space Telescope Optical Telescope Element Pathfinder and Parker Solar Probe models are now on permanent ...

When NASA launched its $10 billion James Webb Space Telescope in 2021, scientists hailed the mission as the greatest achievement of its kind in over three decades. Soon, however, scientists noticed a ...

A Northwestern University-led team of astronomers used NASA’s James Webb Space Telescope to discover a former star that exploded millions of years ago. The star, which was in a nearby galaxy, exploded ...

NASA’s James Webb Space Telescope has found the most compelling evidence to date that a rocky planet beyond the solar system may have an atmosphere. Although it’s not Earth-like, a planet called ...

New observations from the James Webb Space Telescope confirm asteroid 2024 YR4 will not strike the Moon in 2032. NASA scientists refined the object’s orbit using infrared data, showing it will pass ...