Earth has a group of cosmic stalkers. Known as “co-orbitals,” these small bits of rock have a 1:1 mean motion resonance with Earth. Basically, they take the exact same amount of time to orbit the sun as we do. Astronomers have long believed these objects wandered in from the main asteroid belt between Mars and […]

They rank among the darkest and coldest places in the solar system: Hundreds of lunar craters, many of them at the moon’s south pole, never receive direct sunlight and lie in permanent shadow. That’s exactly why physicist Jun Ye and his colleagues suggest that these craters are the perfect place to build a critical component […]

Astronomers may have found an explanation for one of the biggest mysteries revealed by the James Webb Space Telescope (JWST): why so many galaxies in the early universe appear unexpectedly bright in ultraviolet light. The new study, posted to the arXiv preprint server on May 11, suggests that galaxies more than 13 billion years ago […]

When it comes to space debris, what goes up is coming down more often—and not safely.

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Astronomers have tracked a dramatic “changing-look” active galactic nucleus (AGN) whose central supermassive black hole appeared to switch off and then rapidly reignite. The galaxy, HE 1237−2252, dimmed in X-rays by a factor of 17 within just 18 months before recovering again. The paper outlining its analysis was uploaded to the arXiv preprint server on […]

Hundreds of companies raised a combined $70 billion by selling shares to the public in the United States last year.

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An international team of astronomers has utilized the Zwicky Transient Facility (ZTF) and the Transiting Exoplanet Survey Satellite (TESS) to investigate a binary system designated ZTF J0007+4804. As a result, they have found that ZTF J0007+4804 is the first hot subdwarf-white dwarf system discovered that produces dwarf nova outbursts. The finding is reported in a […]

When NASA scientists first observed a particular radio burst from the sun in August 2025, there was nothing unusual about it. But then the radio burst kept going. Typically, solar radio bursts like these last a few hours to days. But this one was different. By the time it was over, the radio burst had […]