Astrophysical Journal

Citizen science project discovers new brown dwarf

One night three months ago, Rosa Castro finished her dinner, opened her laptop, and uncovered a novel object that was neither planet nor star. Therapist by day and amateur astronomer by night, Castro joined the NASA-funded ...

dateJul 17, 2017 in Astronomy
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Shedding light on galaxy rotation secrets

The dichotomy concerns the so-called angular momentum (per unit mass) that in physics is a measure of size and rotation velocity. Spiral galaxies are found to be strongly rotating, with an angular momentum higher by a factor ...

dateJul 14, 2017 in Astronomy
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Astronomers track the birth of a 'super-Earth'

A new model giving rise to young planetary systems offers a fresh solution to a puzzle that has vexed astronomers ever since new detection technologies and planet-hunting missions such as NASA's Kepler space telescope have ...

dateJul 11, 2017 in Astronomy
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Y-type stars

Brown dwarf stars are failed stars. Their masses are so small, less than about eighty Jupiter-masses, that they lack the ability to heat up their interiors to the roughly ten million kelvin temperatures required for normal ...

dateJul 11, 2017 in Astronomy
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Heart of an exploded star observed in 3-D

Supernovas—the violent endings of the brief yet brilliant lives of massive stars—are among the most cataclysmic events in the cosmos. Though supernovas mark the death of stars, they also trigger the birth of new elements ...

dateJul 10, 2017 in Astronomy
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