A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
a process of inspecting, cleaning, transforming, and modeling data with the goal of discovering useful information, suggesting conclusions, and supporting decision making.
Questions regarding the most massive examples of black holes that typically reside at the centers of galaxies.
Icy bodies that usually consist of methane, water, and other materials that originate from beyond the jovian planets, and occasionally fall into the inner solar system giving off a massive tail as mat…
Questions related to the phenomenon whereby electromagnetic radiation (such as visible light) generated by an object moving away from an observer will have increased in wavelength (i.e. shifted toward…
Questions regarding the history of astronomy, including discoveries and scientists.
Questions about the complete or partial blocking of the sun by the moon.
Waves in spacetime formed by the acceleration of massive bodies. A passing wave causes spacetime to be stretched and squashed by a very small amount. Typically we can only detect the most energic grav…
Questions about the measurement of light waves whereby the wavelength is classified by its position in the electromagnetic spectrum.
Questions about the source or effects of the matter that makes up 85% of the matter in the universe but appears to only interact gravitationally.
The application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft.
Questions regarding the property of astronomical objects that determines their inertial resistance and gravitational interaction with other bodies.
Questions regarding a degenerate star that is mainly composed of neutrons.
Questions related to the physical processes involved in or to the observations of the process of forming a star.
a measurement of the average kinetic energy of the molecules in an object or system. In simpler words: it's the degree or intensity of heat present in a substance or object that is comm…
Questions regarding life in the universe, especially the possibility of life outside our planet, or the influence of astronomical forces on life on Earth.
Questions about the parameters needed to specify the characteristics of an orbit.
Questions about positions of objects in the sky, either relative to a fixed coordinate system like the equatorial and ecliptic coordinate systems, or relative to an observer's point of view.
Questions about the observed frequency range of the electromagnetic radiation of a celestrial object.
Questions regarding massive planets composed of layers of gases, such as hydrogen and helium, surrounding a solid/liquid core.
Questions about the processes, theories and evidence for the formation of planetary bodies.
Questions regarding the region of space containing all the objects that we can detect using any method of observation.
Questions regarding the planet Venus, the second planet from Earth's sun.
Questions on objects passing through the atmosphere which leave visible wakes of incandescent material.
Questions regarding the Hubble Space Telescope, a visible light telescope orbiting Earth.
Questions regarding the phenomenon in the early universe characterized by an extreme expansion of space.
Questions regarding the amount of energy produced by an object per unit of time.
Behaviour and properties of light, and its interaction with matter, particularly in detection of light.
Questions regarding the as-yet-unknown energy permeating the universe that is responsible for its expansion.
Questions regarding an object's movement, or its distance traveled relative to the time taken.
Questions regarding specific terms, names, or naming conventions.