text: Matter distribution around these objects is accounted for by the Navarro-Frenk-White profile.
full_question: Matter distribution around these objects is accounted for by the Navarro-Frenk-White profile. De Vaucouleurs' ["voh-koo-LURES"] law relates the surface brightness and apparent distance of these objects. MOND theory was created to account for the unexpected observations in these objects made by Vera Rubin, who measured their orbital speed against radius. Intrinsic luminosity and emission line width for these objects were related by Tully and Fisher, and Seyfert names some of these that have active nuclei. The one nicknamed "Cartwheel" is a lenticular one. For 10 points, name these collections of stars that come in elliptical and spiral varieties, like our Milky Way.
first_sentence: Matter distribution around these objects is accounted for by the Navarro-Frenk-White profile.
raw_answer: galaxies [accept specific galaxies, like spiral or elliptical, until mention]