The radius of a planet is a fundamental parameter that probes its composition and habitability. Precise radius measurements are typically derived from the fraction of starlight blocked when a planet ...

The poorly understood ‘matalafi’ -- the homogenate of Psychotria insularum leaves (fresh leaf juice) -- is widely used in Samoan traditional medicine.

New research from the University of Birmingham explores the nature of photons -- individual particles of light -- in unprecedented detail.

NGC 1514’s two central stars, which appear as one in the image from the NASA/ESA/CSA James Webb Space Telescope, formed this scene over thousands of years -- and will keep at it for thousands more.

In 2023, astronomers reported a tentative detection of dimethylsulfide -- which is predominately produced by marine microbes on Earth and regarded as a biosignature gas -- in the atmosphere of K2-18b.