Young stellar objects (YSOs) as a research area encompass the observational and theoretical study of stars in their early evolutionary phases, from deeply embedded protostars to pre-main-sequence stars such as T Tauri and Herbig Ae/Be objects. This field investigates accretion processes, circumstellar disks, jets and outflows, variability, and the interaction of YSOs with their natal molecular environments across multiple wavelengths (X-ray to radio). Research on YSOs constrains star formation efficiencies, timescales, initial mass functions, and disk evolution, providing critical boundary conditions for models of planet formation and feedback-regulated galactic star formation.
An international team of astronomers has uncovered the most unmistakable evidence yet that the powerful jets launched by newborn stars reliably record a star's most violent growth episodes, confirming a long-standing model ...
Astronomy
Dec 16, 2025
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Astronomers from the University of Hawai'i (UH) at Manoa and elsewhere have observed the Taurus star-forming region, which resulted in the discovery of planetary-mass and stellar companions of two ultracool dwarf stars. The ...
Stars form in massive clouds of gas called molecular clouds. As they form, they accrete gas from these clouds, and as the stars rotate, gas and dust accumulates in a rotating disk around the star called a protoplanetary disk. ...
Astronomy
Dec 5, 2025
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Researchers used the MIRI instrument onboard the James Webb Space Telescope (JWST) to identify the presence of ultraviolet radiation in five young stars in the Ophiuchus region, and to understand its role in the formation ...
Astronomy
Nov 25, 2025
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Close companions can influence stellar evolution in many ways. While some companions can be detected around young stellar objects, direct observational evidence of companions around asymptotic giant branch (AGB) stars or ...
Astronomy
Nov 14, 2025
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When it comes to finding baby, still-forming planets around young stars, the Atacama Large Millimeter/submillimeter Array (ALMA) observatory is astronomers' most adept tool. ALMA has delivered many images of the protoplanetary ...
Astronomy
Nov 4, 2025
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Astronomers have used simultaneous ground-based and space-based observations to measure the temperature and velocity of gas ejected from a young sun-like star. The result showed a two-component ejection consisting of a hot ...
Astrobiology
Oct 28, 2025
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A team of astronomers led by Paulo Cortes, a scientist with the U.S. National Science Foundation National Radio Astronomy Observatory and the Joint ALMA Observatory, have made a groundbreaking discovery about how young star ...
Astronomy
Oct 22, 2025
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Star formation is a fundamental physical process in our universe. Stars light up the cosmos, and give rise to planets, some of which may support life. While humans have no doubt wondered about stars since prehistoric times, ...
Astronomy
Sep 26, 2025
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Scientists created the most accurate three-dimensional map of star-formation regions in our Milky Way galaxy, based on data from the European Space Agency's Gaia space telescope. This map will teach us more about these obscure ...
Astronomy
Sep 16, 2025
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