SEATTLE–After three years of observations using the 10-meter Keck II telescope in Hawaii, Lowell Observatory astronomer Lisa Prato announces discovery of four new low-mass double star systems with ...

Astronomers report the rapid transition of WOH G64 from a red supergiant to a yellow hypergiant, based on photometric and spectroscopic observations published in Nature Astronomy.

N-body simulations of primordial binaries and tidal capture in open clusters / Sverre J. Aarseth -- When and how can binary data test stellar models / Birgitta Nordstrom / Johannes Anderson -- ...

Discovered a New Binary Star? Nope, It's Just a Starlink Satellite Astronomers suspect Starlink satellites are photo-bombing a Chinese telescope's spectroscopic observations, prompting some to ...

Context. The CARMENES spectrograph is surveying ~300 M dwarf stars in search for exoplanets. Among the target stars, spectroscopic binary systems have been discovered, which can be used to measure ...

Astronomers from the University of Sheffield and Pennsylvania State University have performed X-ray and optical observations of a massive star known as Melnick 39. As a result, they found that Melnick ...

Using NASA's Nuclear Spectroscopic Telescope Array (NuSTAR), Indian astronomers have performed X-ray observations of an X-ray binary designated 4U 1907+09. Results of the observational campaign, ...

Astronomers have confirmed a giant planet orbiting a tightly bound pair of young stars, marking a first in direct exoplanet imaging. The planet, known as HD 143811 AB b, is the closest-in world ever ...

The A2 V star σ Scl was suspected of being a low-amplitude rotating variable of the Ap-type star by several authors. Aiming to decide whether the star is a variable chemically peculiar (CP) star, we ...

Publisher from verso of t.p. Series from preface. I. Historical sketch: the early period -- II. Historical sketch: the modern period -- III. Observing methods, visual binary stars -- IV. The orbit of ...