Examples of these objects include Mizar, the middle star of the Big Dipper's handle, and Algol.
The first statistical study of these objects was published in 1935 by Gerard Kuiper, who noted a large period gap in the two subpopulations of these objects. The fact that most planetary nebulae are non-spherical suggests that they are formed by ejection from these objects. Methods of discovering these objects include the common proper motion technique as well as observing dual sets of spectroscopic lines with periodically varying radial velocities and eclipsing patterns. In these systems, mass transfer occurs through the first Lagrangian point when one object within them accretes enough mass to fill its Roche lobe. Examples of these objects include Mizar, the middle star of the Big Dipper's handle, and Algol. For 10 points, identify these systems which consist of a pair of stars in mutual orbit.
The first statistical study of these objects was published in 1935 by Gerard Kuiper, who noted a large period gap in the two subpopulations of these objects.
binary star systems