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When Bright Spots Go Dark
Light and dark regions speckle the Sun and other stars, complicating the interpretation of exoplanet transmission spectra. New modeling suggests that faculae — bright areas on the visible surface of...
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Complexities and Mysteries in the Atmosphere of Ultra-Hot Jupiter WASP-121b
Ultra-hot Jupiter WASP-121b is once again puzzling astronomers. New JWST observations have revealed aspects of this superheated planet’s atmosphere that models cannot yet explain. An Extreme Planet...
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Can Arid Planets Keep Their Cool?
Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we...
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Life on the (Red) Edge
Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we...
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Jupiter’s Atmosphere Holds Steady
Jupiter’s upper atmosphere is hundreds of degrees hotter than it has any right to be, and for decades astronomers could only study it in brief, seemingly chaotic glimpses. New global maps built from...
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Are Water Worlds Just Made of Soot?
Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we...
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Selections from 2025: JWST Searches for an Atmosphere on TRAPPIST-1e
Editor’s Note: For the remainder of 2025, we’ll be looking at a few selections that we haven’t yet discussed on AAS Nova from among the most-downloaded articles published in AAS journals this year. The...
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Weather Forecast for the Habitable Worlds Observatory: Cloudy with a Chance...
Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we...
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Planets Around Small Stars Even Less Likely to Have Atmospheres Than...
Which of the nearly 6,000 known exoplanets have atmospheres? New research suggests that small, rocky planets around the smallest and coolest stars are even less likely to hang on to their atmospheres...
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Abundant but Ambiguous: Understanding the Atmospheres of Sub-Neptunes with JWST
Recent JWST observations of exoplanet GJ 3090b reveal intriguing qualities of one of the galaxy’s most abundant planet types. Many Sub-Neptunes, Many Mysteries Over the past 30 years, astronomers have...
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Two More Double-Faced White Dwarfs Discovered
A recent study brings the number of known double-faced white dwarfs to seven. These rare objects, which feature compositional changes across their surfaces, may arise under the influence of magnetic...
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Life Is Like a Box of Potential Biosignatures
Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we...
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Roasted Marshmallows Setting Fire to Our Understanding of Planet Formation?
Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we...
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Now That’s Ingenuity: First Aircraft Measurement of Winds on Another Planet
Researchers have used an aircraft to measure the wind speed on Mars, marking the first time this method has been used on another planet. This groundbreaking measurement was made possible by the...
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Charting the Cosmic Shoreline: Which Planets Have Atmospheres?
Which of the nearly 6,000 known exoplanets have atmospheres? With help from JWST, astronomers are inching closer to an answer, and new observations of a super-Earth planet around a low-mass star help...
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Pointing to the Poles of Brown Dwarfs: Polar Vortex Possibilities
Somewhere between planets and stars is a cool, cloudy class of objects called brown dwarfs. A new study suggests that swirling clouds at the poles of these intriguing objects may provide clarity on...
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Featured Image: Finding Swirls on Jupiter
As you gaze upon these images of swirling clouds on Jupiter, do you see vortices? This is the question posed by the Jovian Vortex Hunter citizen science project, which invites participants to examine...
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It’s An Eyeball Summer, and Other Weird K/M-Dwarf Habitable Climate Tales
Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we...
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Monthly Roundup: The Allure of Temperate Exoplanets
Choosing a favorite planet has never been more challenging: researchers have discovered more than 5,600 exoplanets that range from super-heated super-puffs skimming the surfaces of their host stars to...
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The Case of Shrinking Planets
Editor’s Note: Astrobites is a graduate-student-run organization that digests astrophysical literature for undergraduate students. As part of the partnership between the AAS and astrobites, we...
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