Scientists have uncovered new evidence that tiny grains of ancient stardust may have played a key role in creating the first solid material in our solar system more than 4.5 billion years ago. The discovery suggests that these microscopic particles, left behind by stars that lived and died before our Sun existed, acted as the […]

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When stars like our Sun age, they puff up into red giants. Their bubbling outer mass gradually escapes into space, and their remaining cores contract into white dwarfs. Since most stars end their lives this way, the universe is teeming with white dwarfs. A new study from Caltech’s Jim Fuller, professor of theoretical astrophysics, proposes a […]

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