科学与环境
A tiny shift exposes a cold brown dwarf masquerading as an early galaxy
来源: Phys.org - latest science and technology news stories · 发布于
A faint red object spotted by the James Webb Space Telescope originally appeared to offer a possible glimpse of the universe's first galaxies. But images taken about 3½ years apart revealed a giveaway: The object, nicknamed Capotauro, had moved.
A faint red object spotted by the James Webb Space Telescope originally appeared to offer a possible glimpse of the universe's first galaxies. But images taken about 3½ years apart revealed a giveaway: The object, nicknamed Capotauro, had moved.
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Leviathan's sprawling stars challenge idea that dusty giants become compact galaxies
Astronomers using the James Webb Space Telescope (JWST) have confirmed a massive, dust-rich galaxy called Leviathan in the early universe. Seen when the universe was roughly 1.5 billion years old, the galaxy has its stars spread out rather than in a concentrated fashion. A paper,
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James Webb discovers a scorching lava planet with a “giant sunscreen”
A scorching lava planet 280 light-years away has surprised astronomers by apparently maintaining a thick atmosphere despite conditions that should have stripped it away billions of years ago. James Webb Space Telescope observations suggest that TOI-561 b reflects about 75% of inc
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NASA's Hubble and Webb discover ancient worlds that remember their past
NASA’s Hubble and James Webb Space Telescopes have uncovered surprising clues about the solar system’s origins by studying 27 tiny, distant objects beyond Neptune. Scientists discovered that these ancient building blocks of planets have remained remarkably unchanged for billions
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NASA’s Artemis I mission reveals surprising radiation levels near the Moon
NASA’s Artemis I mission has revealed that cosmic radiation near the Moon is higher than in Earth orbit, but not by as much as scientists might expect. Tiny experimental detectors also uncovered surprising details about how radiation passes through the human body, offering valuab
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The hidden cost of the night shift and how to sleep it off
More than three million people in the UK work night shifts, which can greatly impact their health. What can be done to help them?
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