14 relations: Absolute magnitude, Apparent magnitude, Arnold Kohlschütter, Astronomical spectroscopy, Distance modulus, Dynamical parallax, European Space Agency, Extinction (astronomy), Main sequence, Parallax, Parsec, Photometric parallax method, Stellar classification, Walter Sydney Adams.
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
Ernst Arnold Kohlschütter (July 6, 1883 – May 28, 1969) was a German astronomer and astrophysicist from Halle.
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light and radio, which radiates from stars and other celestial objects.
The distance modulus is a way of expressing distances that is often used in astronomy.
In astronomy, the distance to a visual binary star may be estimated from the masses of its two components, the size of their orbit, and the period of their orbit about one another.
The European Space Agency (ESA; Agence spatiale européenne, ASE; Europäische Weltraumorganisation) is an intergovernmental organisation of 22 member states dedicated to the exploration of space.
In astronomy, extinction is the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the observer.
In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.
The photometric parallax method is a method of data analysis used in astronomy that uses the colours and apparent brightnesses of stars to infer their distances.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
Walter Sydney Adams (December 20, 1876 – May 11, 1956) was an American astronomer.