I finally have a question of the day that can be presented to all! Most of the ones I've been asking have been about friends' lives and therefore have not been posted here. But a while ago I learned about something new and exciting while walking and talking with a friend: binary systems.
A binary star system is a pair of stars that are close enough to one another that they are connected by mutual gravitational pull. The brighter star is the primary star, and its partner is usually called the companion star. The speed of their movement depends on their distance from one another along their elliptical orbits. The closer they are, the faster they move.
That's all I could find out without getting into things that have way too much astrophysics for me to understand. While I think they're interesting, they're not interesting enough for me to extensively educate myself on them.
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