The study of the celestial bodies, relative to x-ray emission. Satellites launched to study x-ray sources have revealed many new classes of galactic and extragalactic sources, as well as the definition of spectral properties, positions and time...

A microchannel plate (MCP) is a specialized electron multiplier device used in various applications such as particle...

The study and the interpretation of the infrared emittances of celestial bodies and phenomena.

An intensified charge-coupled device (ICCD) camera is an advanced imaging device that combines the capabilities of both an...

An astronomical mirror, also known as a telescope mirror or primary mirror, is a key component of a reflecting telescope. It...

A photomultiplier tube (PMT) is a highly sensitive vacuum tube that detects and amplifies low levels of light. It is widely...

A retroreflector is an optical device or structure that reflects incident light or electromagnetic waves back to their...

1. In astronomy, the angle measured clockwise (eastward) in a horizontal plane, usually from north (true north, Y-north,...

Magnetorheological finishing (MRF) is a precision optics polishing technique used for shaping and finishing optical surfaces...

Adaptive optics (AO) is a technology used to improve the performance of optical systems by reducing the effects of...

A lateral shearing interferometer is an optical device used in interferometry to measure phase differences between two beams...

A spectroradiometer is a device used to measure the intensity of light at different wavelengths across the electromagnetic...

In astronomy, the relation that states that the intensity of a star's visible radiation is inversely proportional to the...

A holographic grating is a type of diffraction grating that is produced using holographic recording techniques. It consists...

The point spread function (PSF) is a fundamental concept in imaging that describes the response of an imaging system to a...

A reflection grating is an optical component that consists of a series of closely spaced, parallel reflecting surfaces or...

The detection and analysis of naturally formed extraterrestrial electromagnetic radiation within the radio frequency range...

A near-infrared (NIR) camera is an imaging device designed to capture images in the near-infrared region of the...

A wide-field multiobject spectroscopy system used in astronomy, in which a bundle of low-loss optical fibers positioned on...

An emission spectrum is a graphical representation or a characteristic pattern of the wavelengths or frequencies of light...

Scientific complementary metal-oxide semiconductor (sCMOS) refers to a type of image sensor technology specifically designed...

A technique used in astronomy that requires a radio telescope to be directed at a point in the sky west of the object under...

Fizeau fringes are interference fringes observed in an interferometer, specifically in a Fizeau interferometer. The Fizeau...

The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these...

Pyramid error in optics refers to an aberration in the shape of an optical surface, particularly in the context of mirrors....

A diffraction grating is an optical component consisting of a surface with a periodic structure of equally spaced, parallel...

A CCD camera, or charge-coupled device camera, is a type of digital camera that utilizes a CCD image sensor to capture and...

A corner cube, also known as a corner reflector or retroreflector prism, is a type of optical device used to reflect light...

A mid-infrared camera is a type of imaging device designed to capture images in the mid-infrared (mid-IR) spectral range,...

A CubeSat is a type of miniaturized satellite characterized by its standardized size and modular design. CubeSats are...

An optical filter is a device that selectively transmits or blocks specific wavelengths, or colors, of light. Optical...

Optical phase distortion refers to a phenomenon where the phase of an optical wavefront is altered as it propagates through...

Aplanatic points refer to specific points in an optical system where certain aberrations, such as spherical aberration or...

Spectroscopy is a technique used in the study of interactions between matter and electromagnetic radiation. It involves...

The Shack-Hartmann wavefront sensor is an optical device used for measuring the wavefront aberrations of an optical system....

That branch of astronomy concerned with the study of the moon's physical characteristics.

An infrared camera, also known as a thermal imaging camera or IR camera, is a device that captures and visualizes the...

Mie scattering, named after the German physicist Gustav Mie, refers to the scattering of electromagnetic radiation (such as...

A photon sieve is an optical device used in the field of optics and imaging. It's designed to focus and shape light,...

In a remote sensing system, nadir refers to the point on the ground located vertically below the center of the system. In...

In astronomy, the main lobe of an antenna pattern that has a small angular extent in two mutually perpendicular directions....

Photometry is the branch of science that deals with the measurement of light, particularly in terms of its intensity and the...

An EMCCD (electron-multiplying charge-coupled device) camera is a type of scientific camera specifically designed for...

Infrared (IR) refers to the region of the electromagnetic spectrum with wavelengths longer than those of visible light, but...

In astronomy, the method of deliberately viewing objects with peripheral vision to take advantage of the eye's greater...

In astronomy, the relative brightness of a celestial body. Originally a scale from 1 to 6, where 1 represented the brightest...

An apochromat, often referred to as an apochromatic lens or apochromatic objective, is a type of optical system designed to...