This introduction to the spectroscopy, mainly by radio astronomy, of interstellar molecules was written five years before the discovery of C60. It covers an introduction to interstellar medium and ...

Astronomers have published the first clear detection of signatures long sought in the spectra of X-ray astronomical sources, the so-called EXAFS signatures, standing for "Extended X-ray Absorption ...

ABSTRACT Microlens arrays are now widely used in a variety of astronomical instruments that require high performance. This paper describes the applications of microlenses in astronomical spectroscopy ...

Visual demonstration of the performance of the diffraction grating. The zeroth order transmission refers to light that goes straight through the grating without undergoing diffraction (which should be ...

THE German original of this work appeared in the autumn of 1890, and was doubtless eagerly welcomed by many who had felt the want of a handbook of spectroscopy which gave a tolerably detailed account ...

My main area of research relates to the development of laser and parametric optical frequency combs and their application to optical atomic clocks, tests of fundamental physics, trace gas sensing, ...

High-resolution spectral scans (0.1 Å-1 Å) of the optical candidate for the X-ray transient X0331 + 53 in January 1984 show broad hydrogen and helium emission (FWZI = 335 km s⁻¹) and strong ...

Life for the 19th-century astronomer was kind of monotonous, 200 years after Galileo's revolutionary work with the telescope. Astronomers had carefully tracked the motions of the planets, discovered a ...