Triple Star Systems Protoplanetary Disks Young Stars Alpha Centauri Red Dwarfs Binary Systems Binary Stars Barnard's Star Binary Star Systems Planetary Systems Recurring Novae White Dwarf-Red Giant System Planetary Ingestion Planet Formation Star Mergers Nebulae Magnetic Stars Stellar Evolution Stellar Binaries Triple-Star System Binary System Beta Pictoris System Star Systems Young Stellar System WL20 Polaris Barnard's Star System TOI-3261 System Red Dwarf Stars