ASTR 1150 Lecture Notes - Lecture 8: Light Curve, Binary Star, Planetary Nebula
Document Summary
Astr 1150 - lecture eight: binary stars and exoplanets. Two stars orbiting around a common center of mass. Systems with more than two stars are rare (difficult to keep all 3 around) At least half the stars in two sky are binary stars. Barycentre is closer to star with higher mass. Stars are always on opposite sides of barycenter. Obrits offset from barycenter depending on mass. Multiple star systems are relatively easy to make, but can be unstable. One of many of the star created in the same space can be launched into interstellar space due to gravity- why we usually only binaries and very few systems with more than two stars. Binary systems tend to not to be very kind to planets and other smaller bodies. Most binary star systems are too far away to resolve both stars. Distances between companions is small compared to distance to earth and telescopes can"t resolve those small distances.
