# Absolute magnitude: Quiz

Question 1:
When was the Absolute magnitude?
 1992-10-20 1959-05-22 June 2009 1959-05-25

Question 2: ________ has a parallax of 0.742" and an apparent magnitude of −0.01
Theta CentauriAlpha CentauriGamma CentauriEta Centauri

Question 3: The ________, for example, has an absolute magnitude of about −20.5.
Local GroupGalaxyGalactic CenterMilky Way

Question 4: The lower an object's absolute magnitude, the higher its ________.
StarLuminosityApparent magnitudeSirius

Question 5: For much more distant objects the Euclidean approximation is not valid, and ________ must be taken into account when calculating the luminosity distance of an object.
GravitationIntroduction to general relativityBlack holeGeneral relativity

Question 6: Bolometric magnitude is ________ expressed in magnitude units; it takes into account energy radiated at all wavelengths, whether observed or not.
Absolute magnitudeSiriusLuminosityStar

Question 7: To derive absolute magnitude from the observed ________ of a celestial object its value is corrected from distance to its observer.
StarBinary starApparent magnitudeSupernova

Question 8: In defining absolute magnitude it is necessary to specify the type of ________ being measured.

Question 9: In ________, absolute magnitude (also known as absolute visual magnitude when measured in the standard V phometric band) measures a celestial object's intrinsic brightness.
SunAstronomyStarAstrophysics

Question 10: The absolute magnitude then equals the ________ an object would have if it were at a standard luminosity distance (10 parsecs, or 1 AU, depending on object type) away from the observer, in the absence of astronomical extinction.
Binary starStarApparent magnitudeSupernova