The star must have a helium-dominated atmosphere, but the relative H/He abundances could vary over the surface due to the influence of the magnetic field. The observed combination of neutral helium and hydrogen lines (and at comparable intensities) may be unique among white dwarf stars. The proper motion from Luyten and the Lowell Observatory is large enough to very nearly constrain the star to be degenerate, rather than a hot subdwarf the blue continuum indicates that it is the hottest of the known magnetic degenerate stars. It is argued that the period must be due to rotation, and an oblique rotator model with the rotation axis in the plane of the sky and at approx.24degree tilt angle to the magnetic axis is compatible with the available observations. The star in fact provides the first confirmation of the theoretical spectra of hydrogen and helium in such high fields, inaccessible to laboratory measurement. The detailed absorption spectrum is shown to fit Zeeman patterns of hydrogen and neutral helium in the presence of a more » mean homogeneous surface field varying slightly with the polarization period from 18 to 20 megagauss. Spectra obtained with the Lick Observatory scanner and the UCSD Digicon at Steward Observatory are presented. A photon lower in a gravitational potential expends energy to climb out, and this energy cost is seen as a redshift. The mean longitudinal field at peak polarization is estimated to be 5 megagauss. Gravitational redshift experiments are tests of conservation of energy in a gravitational potential. The polarization observations show a variation that is sinusoidal with amplitude 0.3%, a mean of nearly zero, and a period of 2.2 hours an ephemeris is provided. The blue white dwarf suspect Feige 7 (=L795-7=GR 267) has been found to be magnetic with a rich optical spectrum and variable circular polarization. The idea was to use an isotope of Iron (Fe57 to be. Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.=. Gravitational redshift is the reddening of light as it escapes from the gravitational well in space time.
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