JWST data suggest exoplanet K2-18b may have molten surface rather than a watery ocean

The fraction of nitrogen in the planet’s atmosphere compared to the planet’s total inventory, as a function of magma ocean oxygen fugacity. As oxygen fugacity is decreased, nitrogen’s increased solubility depletes the atmosphere by orders of magnitude. Credit: The Astrophysical Journal Letters (2024). DOI: 10.3847/2041-8213/ad206e A multi-institutional team of astronomers, …

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Which came first: Black holes or galaxies?

An illustration of a magnetic field generated by a supermassive black hole in the early universe, showing turbulent plasma outflows that turn gas clouds into stars. Credit: ROBERTO MOLAR CANDANOSA / JHU Black holes not only existed at the dawn of time, they birthed new stars and supercharged galaxy formation, …

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Learning the trick to finding cannibalized stars

Artistic depiction of a Be star and its disk (upper right) orbited by a faint, hot, stripped star (lower left). Credit: Painting by William Pounds Scientists working with the powerful telescopes at Georgia State’s Center for High Angular Resolution Astronomy (CHARA) Array have completed a survey of a group of …

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Hubble spots a galaxy shrouded by stars

This Hubble image shows irregular galaxy ESO 245-5 located some of 15 million light-years from Earth. Credit: ESA/Hubble & NASA, M. Messa This NASA/ESA Hubble Space Telescope image shows a densely packed field of stars laid upon a background of dust, gas, and light from more distant celestial objects. There …

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Lunar science is entering a new active phase

The Intuitive Machines payload, which will contain materials for ROLSES, shown on the lunar surface in an illustration. Intuitive Machines, Inc. For the first time since 1972, NASA is putting science experiments on the moon in 2024. And thanks to new technologies and public-private partnerships, these projects will open up …

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