who developed the telescope?
NASA.
Spitzer Space Telescope
In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. 
how does a white dwarf form? After the hydrogen-fusing period of a main-sequence star of low or medium mass ends, such a star will expand to a red giant. It the red giant  has insufficient mass to generate the core temperatures required to fuse carbon it forms a planetary nebula. The remaining core is the white dwarf. what metals does it contain? UNANSWERABLE when was it discovered? In 1910. and who discovered it? Henry Norris Russell, Edward Charles Pickering and Williamina Fleming. mention a few works published by the first person? He co-authored a two-volume textbook titled "Astronomy: A Revision of Young’s Manual of Astronomy" . how is the magnetic field of white dwarf? Since 1970 magnetic fields have been discovered in well over 200 white dwarfs, ranging  0.2 T to 100 kT. is it habitable? It has been proposed that white dwarfs with surface temperatures of less than 10,000 Kelvins could harbor a habitable zone at a distance of c. 0.005 to 0.02 AU. does it have any debris around it? Yes, mainly dust clouds. name a place where such dwarfs can be found? The Sirius binary star. are the dwarfs found in any nebula? UNANSWERABLE which telescope was used to discover the dwarf? Spitzer Space Telescope.
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Spitzer Space Telescope [SEP] Introduction
Pre-launch tests had been conducted to determine the expected performance of the equipment in this state, along with tests at the University of Rochester, confirming the continuing capability of the detectors. During the warm mission, the two short wavelength channels of IRAC operated at 30 K, which was predicted to experience little to no degradation compared to the nominal mission. The "Spitzer" data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA). In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named by a board of scientists, typically after famous deceased astronomers, the new name for SIRTF was obtained from a contest open to the general public.