is probably the most famous example. White dwarfs can also exist as binaries or multiple star systems that only consist of white dwarfs. An example of a resolved triple white dwarf system is WD J1953-1019, discovered with Gaia DR2 data. One interesting field is the study of remnant planetary systems around white dwarfs. While stars are bright and often outshine the exoplanets and brown dwarfs that orbit them, the white dwarfs are faint. This allows astronomers to study these brown dwarfs or exoplanets in more detail. The sub-brown dwarf around the white dwarf WD 0806−661 is one such example. Nearest Gallery See also References External links and further reading General Rebassa-Mansergas, A.; Gänsicke, B. T.; Rodríguez-Gil, P.; Schreiber, M. R.; Koester, D. (28 November 2007). "Post-common-envelope binaries from SDSS – I. 101 white dwarf main-sequence binaries with multiple Sloan Digital Sky Survey spectroscopy: Post-common-envelope binaries from SDSS". Monthly Notices of the Royal Astronomical Society. 382 (4): 1377–1393. doi:10.1111/j.1365-2966.2007.12288.x. Physics Black holes, white dwarfs, and neutron stars: the physics of compact objects, Stuart L. Shapiro and Saul A. Teukolsky, New York: Wiley, 1983. . — Discusses how to find mass-radius relations and mass limits for white dwarfs using simple energy arguments. Variability Magnetic field Frequency Observational Images Astronomy Picture of the Day Star types Stellar evolution Stellar phenomena Exotic matter Articles containing video clips