The Deslandres table, also known as the Deslandres chart, is a tool used in the field of astronomy and astrophysics to facilitate the classification and analysis of celestial bodies' spectra, particularly stars. Named after the French astronomer Camille Deslandres, the table organizes spectral lines based on their wavelengths. In detail, the Deslandres table presents a systematic arrangement of the absorption or emission lines observed in the spectra of stars.

The term "diffuse series" can refer to different concepts depending on the context. However, it is not a widely recognized term in any specific field, such as mathematics, physics, or biology. It might be a misinterpretation or a specific concept within a niche area that is not broadly known.

The Ellis R. Lippincott Award is an honor presented by the American Association of Law Libraries (AALL). It recognizes significant contributions to the field of legal information and law librarianship, typically through excellence in legal research, teaching, and the development of legal information resources. Named after a prominent figure in law librarianship, the award underscores the importance of innovation, leadership, and dedication in legal information services.

Fluorescence spectroscopy is an analytical technique used to measure the fluorescence emitted by a substance after it has absorbed light or other electromagnetic radiation. This technique is based on the principle of fluorescence, where certain molecules (fluorophores) absorb light at a specific wavelength and subsequently emit light at a longer wavelength.

The GF method, or the Galerkin Finite Element method, is a numerical technique used for solving differential equations, particularly in the fields of engineering and applied mathematics. It is a type of finite element method (FEM) that combines the Galerkin method—which is a technique for converting a continuous problem (like a differential equation) into a discrete one—with the finite element analysis framework.

Gamma spectroscopy is an analytical technique used to measure and analyze the energy and intensity of gamma-ray radiation emitted by radioactive materials. This method is widely utilized in various fields, including nuclear physics, environmental monitoring, medical diagnostics, and radioactive waste management, among others. ### Key Concepts of Gamma Spectroscopy: 1. **Gamma Rays**: Gamma rays are high-energy electromagnetic radiation emitted during radioactive decay. They have no mass or charge, making them highly penetrating and difficult to shield.

A blue dwarf is a theoretical type of star that would occur at the end of the main sequence phase of red dwarfs in the far future. Red dwarfs are the smallest and coolest type of main-sequence stars. They burn their hydrogen at a low rate and can have lifespans that last for tens to hundreds of billions of years, far exceeding that of larger stars, which typically evolve into more massive stages like red giants.

A common envelope jets supernova refers to a specific type of supernova explosion associated with binary star systems, particularly those involving a white dwarf and a companion star. In this scenario, the two stars orbit each other closely, and as they evolve, the outer layers of one star can transfer mass to the other via an unstable mass transfer, leading to a "common envelope" phase.

A Thorne–Żytkow object (TZO) is a hypothetical type of astronomical object that is a unique combination of a neutron star and a red giant star. This concept arises from theoretical studies in astrophysics and is named after physicists Kip Thorne and Edward Żytkow, who proposed the idea in the 1970s.

The Hasegawa–Mima equation is a nonlinear partial differential equation that arises in the study of plasma physics, particularly in the context of magnetically confined plasmas, such as those found in fusion reactors. It describes the evolution of certain wave phenomena in a magnetized plasma, specifically the dynamics of plasma turbulence and the behavior of density perturbations.

The thin-film equation describes the evolution of a thin liquid film, typically on a solid substrate. This equation is important in fluid dynamics and materials science and is often used in contexts such as coatings, wetting, and thin-film flow dynamics. The thin-film equation can be derived from the Navier-Stokes equations under certain assumptions, specifically when considering a thin film with small thickness compared to its other dimensions.

Alpenglow refers to the phenomenon where mountains, typically at sunset or sunrise, are bathed in a warm, reddish or pinkish light. This effect occurs when the sun is just below the horizon, casting its rays onto the mountains. The light interacts with the atmosphere and the snow or rocky surfaces of the mountains, creating a beautiful visual display. Alpenglow is often most pronounced on the peaks and ridges, where the sunlight has a more direct angle.

Aurorasaurus is a citizen science project and online platform that allows individuals to report and track auroras, or the Northern and Southern Lights. Launched in 2014, Aurorasaurus aims to gather real-time data on auroral events by collecting reports from amateur astronomers, photographers, and the general public. Users can share their experiences and photographs of auroras, which are then mapped and made available to researchers and the public.

A keogram is a type of visual representation used primarily in the field of atmospheric science, particularly in the study of auroras and other phenomena related to the Earth's magnetosphere. It is a 2D image that captures the brightness or intensity of a specific phenomenon over time. In a keogram, time is represented on one axis (usually the horizontal axis), while the vertical axis represents a specific spatial dimension — often the zenith angle or latitude of the observation site.

A Lowitz arc refers to a specific type of arc in the context of singularities in mathematical functions or curves. More particularly, it is associated with certain kinds of algebraic varieties and homological properties in algebraic geometry. In the context of algebraic curves, a Lowitz arc is defined as a formal object that generalizes the notion of a point in algebraic geometry, allowing the study of families of points or infinite branches within a curve or surface.

The term "mirage" can refer to a few different concepts depending on the context: 1. **Optical Illusion**: In the most common sense, a mirage is an optical phenomenon that occurs when layers of air at different temperatures create a distortion in the way light travels. This often results in the appearance of water or a reflection of the sky on a hot road or desert surface. The light refracts due to temperature gradients and creates an image of something that isn't actually there.

The Parry arc, named after the geologist John Parry, refers to a specific feature in the context of glaciology and snow dynamics. It is a type of snow accumulation pattern that occurs on the leeward side (the side away from the wind) of an obstruction, such as a mountain or a ridge. When wind blows snow, it can create depositional areas where snow collects and builds up due to the reduction of wind speed and turbulence in the sheltered area.

A double sunset refers to a phenomenon where two sunsets can be observed in quick succession. This typically occurs in areas with unique geographical features, such as high mountains or deep valleys, where the sun can dip below the horizon at different heights or angles, allowing observers to see the sun set multiple times from varying perspectives. Double sunsets are sometimes seen in places like the Écrins National Park in France or in certain regions of the Arctic, where the landscape allows for this unusual optical effect.