61 relations: Albedo, Alexander von Humboldt, Antisolar point, Asteroid, Asteroid belt, Astronomy in the medieval Islamic world, Autumn, Backscatter, Brian May, Cambridge University Press, Comet, Comet dust, Cosmic dust, Cosmos (Humboldt), Dawn, Ecliptic, Exoplanet, Exozodiacal dust, Extinct comet, False sunrise, Forward scatter, Fresh Air, Gegenschein, Giovanni Domenico Cassini, Hadith, Interplanetary dust cloud, Islam, Joshua Childrey, Kordylewski cloud, Light pollution, Light scattering by particles, Lunar phase, Meteorite, Microgram, Micrometeorite, Micrometre, Minor planet, Moon, Moonlight, Muhammad, Nicolas Fatio de Duillier, Night sky, Optical phenomena, Orbit, Particle size, Photon diffusion, Poynting–Robertson effect, Queen (band), Rosetta (spacecraft), Salah, ..., Solar System, Spectroscopy, Spring (season), Springer Nature, Sun, Sunlight, Sunrise, Sunset, Twilight, Zodiac, 67P/Churyumov–Gerasimenko. Expand index (11 more) » « Shrink index
Albedo (albedo, meaning "whiteness") is the measure of the diffuse reflection of solar radiation out of the total solar radiation received by an astronomical body (e.g. a planet like Earth).
Friedrich Wilhelm Heinrich Alexander von Humboldt (14 September 17696 May 1859) was a Prussian polymath, geographer, naturalist, explorer, and influential proponent of Romantic philosophy and science.
The antisolar point is the abstract point on the celestial sphere directly opposite of the Sun from an observer's perspective.
Asteroids are minor planets, especially those of the inner Solar System.
The asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter.
Islamic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age (9th–13th centuries), and mostly written in the Arabic language.
Autumn, also known as fall in American and Canadian English, is one of the four temperate seasons.
In physics, backscatter (or backscattering) is the reflection of waves, particles, or signals back to the direction from which they came.
Brian Harold May, (born 19 July 1947) is an English musician, singer, songwriter, astrophysicist, and photographer.
Cambridge University Press (CUP) is the publishing business of the University of Cambridge.
A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing.
Comet dust refers to cosmic dust that originates from a comet.
Cosmic dust, also called extraterrestrial dust or space dust, is dust which exists in outer space, as well as all over planet Earth.
Cosmos (in German Kosmos – Entwurf einer physischen Weltbeschreibung) is an influential treatise on science and nature written by the German scientist and explorer Alexander von Humboldt.
Dawn, from an Old English verb dagian: "to become day", is the time that marks the beginning of twilight before sunrise.
The ecliptic is the circular path on the celestial sphere that the Sun follows over the course of a year; it is the basis of the ecliptic coordinate system.
An exoplanet or extrasolar planet is a planet outside our solar system.
Exozodiacal dust is 1-100 micrometre-sized grains of amorphous carbon and silicate dust that fill the plane of extrasolar planetary systems.
An extinct comet is a comet that has expelled most of its volatile ice and has little left to form a tail and coma.
A false sunrise is any of several atmospheric optical phenomena in which the Sun appears to have risen, but is actually still some distance below the horizon.
In telecommunication and astronomy, forward scatter is the deflection—by diffraction, nonhomogeneous refraction, or nonspecular reflection by particulate matter of dimensions that are large with respect to the wavelength in question but small with respect to the beam diameter—of a portion of an incident electromagnetic wave, in such a manner that the energy so deflected propagates in a direction that is within 90° of the direction of propagation of the incident wave (i.e., the phase angle is greater than 90°).
Fresh Air is an American radio talk show broadcast on National Public Radio stations across the United States since 1985.
Gegenschein (German for "countershine") is a faintly bright spot in the night sky, around the antisolar point.
Giovanni Domenico Cassini (8 June 1625 – 14 September 1712) was an Italian (naturalised French) mathematician, astronomer and engineer.
Ḥadīth (or; حديث, pl. Aḥādīth, أحاديث,, also "Traditions") in Islam refers to the record of the words, actions, and the silent approval, of the Islamic prophet Muhammad.
The interplanetary dust cloud, or zodiacal cloud, consists of cosmic dust (small particles floating in outer space) that pervades the space between planets in the Solar System and other planetary systems.
IslamThere are ten pronunciations of Islam in English, differing in whether the first or second syllable has the stress, whether the s is or, and whether the a is pronounced, or (when the stress is on the first syllable) (Merriam Webster).
Joshua Childrey (1623–1670) was an English churchman and academic, antiquary and astrologer, the archdeacon of Salisbury from 1664.
Kordylewski clouds are large concentrations of dust that may exist at the and Lagrangian points of the Earth–Moon system.
Light pollution, also known as photopollution, is the presence of anthropogenic light in the night environment.
Light scattering by particles is the process by which small particles (e.g. ice crystals, dust, atmospheric particulates, cosmic dust, and blood cells) cause optical phenomena, such as rainbows, the blue color of the sky, and halos.
The lunar phase or phase of the Moon is the shape of the directly sunlit portion of the Moon as viewed from Earth.
A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon.
In the metric system, a microgram or microgramme (μg; the recommended symbol in the United States when communicating medical information is mcg) is a unit of mass equal to one millionth of a gram.
A micrometeorite is essentially a micrometeoroid that has survived entry through Earth's atmosphere.
The micrometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equaling (SI standard prefix "micro-".
A minor planet is an astronomical object in direct orbit around the Sun (or more broadly, any star with a planetary system) that is neither a planet nor exclusively classified as a comet.
The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.
Moonlight consists of mostly sunlight (with little earthlight) reflected from the parts of the Moon's surface where the Sun's light strikes.
MuhammadFull name: Abū al-Qāsim Muḥammad ibn ʿAbd Allāh ibn ʿAbd al-Muṭṭalib ibn Hāšim (ابو القاسم محمد ابن عبد الله ابن عبد المطلب ابن هاشم, lit: Father of Qasim Muhammad son of Abd Allah son of Abdul-Muttalib son of Hashim) (مُحمّد;;Classical Arabic pronunciation Latinized as Mahometus c. 570 CE – 8 June 632 CE)Elizabeth Goldman (1995), p. 63, gives 8 June 632 CE, the dominant Islamic tradition.
Nicolas Fatio de Duillier (also spelled Faccio or Facio; 16 February 1664 – 12 May 1753) was a Swiss-born mathematician, natural philosopher, inventor, and religious campaigner.
The term night sky, usually associated with astronomy from Earth, refers to the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon.
Optical phenomena are any observable events that result from the interaction of light and matter.
In physics, an orbit is the gravitationally curved trajectory of an object, such as the trajectory of a planet around a star or a natural satellite around a planet.
Particle size is a notion introduced for comparing dimensions of solid particles (flecks), liquid particles (droplets), or gaseous particles (bubbles).
Photon diffusion is a situation where photons travel through a material without being absorbed, but rather undergoing repeated scattering events which change the direction of their path.
The Poynting–Robertson effect, also known as Poynting–Robertson drag, named after John Henry Poynting and Howard P. Robertson, is a process by which solar radiation causes a dust grain orbiting a star to lose angular momentum relative to its orbit around the star.
Queen are a British rock band that formed in London in 1970.
Rosetta was a space probe built by the European Space Agency launched on 2 March 2004.
Salah ("worship",; pl.; also salat), or namāz (نَماز) in some languages, is one of the Five Pillars in the faith of Islam and an obligatory religious duty for every Muslim.
The Solar SystemCapitalization of the name varies.
Spectroscopy is the study of the interaction between matter and electromagnetic radiation.
Spring is one of the four conventional temperate seasons, following winter and preceding summer.
Springer Nature is an academic publishing company created by the May 2015 merger of Springer Science+Business Media and Holtzbrinck Publishing Group's Nature Publishing Group, Palgrave Macmillan, and Macmillan Education.
The Sun is the star at the center of the Solar System.
Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light.
Sunrise or sun up is the instant at which the upper edge of the Sun appears over the horizon in the morning.
Sunset or sundown is the daily disappearance of the Sun below the horizon as a result of Earth's rotation.
Twilight on Earth is the illumination of the lower atmosphere when the Sun itself is not directly visible because it is below the horizon.
The zodiac is an area of the sky that extends approximately 8° north or south (as measured in celestial latitude) of the ecliptic, the apparent path of the Sun across the celestial sphere over the course of the year.
67P/Churyumov–Gerasimenko (abbreviated as 67P or 67P/C-G) is a Jupiter-family comet, originally from the Kuiper belt, with a current orbital period of 6.45 years, a rotation period of approximately 12.4 hours and a maximum velocity of.