Besides being a point of light, a star is a luminous, spherical mass of plasma, enough to hold itself together under its own gravity. On its own, though, gravitational rounding isn't enough.
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January's full Moon peaks at about 5:30 EST on the 13th—earlier as you go westward, though; for example, in Houston, it peaks at 4:26 p.m., and in Sacramento the full Moon peaks at 2:26.