Gender binary Gender binary The gender binary, also referred to as gender binarism (sometimes shortened to just binarism), is the classification of sex and gender into two distinct, opposite and disconnected forms of masculine and feminine. Gender binary is one general type of a gender system. Sometimes in this binary model, "sex", "gender" and "sexuality" are assumed by default to align. For example, when a male is born, gender binarism assumes the male will be masculine in appearance, character traits, and behavior, including having a heterosexual attraction to females. The term "gender binary" describes the system in which a society splits its
Contact binary of years, the common envelope is a dynamically unstable phase in binary evolution that either expels the stellar envelope or merges the binary in a timescale of months to years. Contact binary In astronomy, a contact binary is a binary star system whose component stars are so close that they touch each other or have merged to share their gaseous envelopes. A binary system whose stars share an envelope may also be called an overcontact binary. Almost all known contact binary systems are eclipsing binaries; eclipsing contact binaries are known as W Ursae Majoris variables, after their type star, W