Detection Methods LIGO Black Hole Mergers Detection Black Holes Astrophysical Phenomena Detection Technology Detection Techniques Binary Systems Space-Time Astrophysics LIGO-Virgo-KAGRA Observatories Cosmology Cosmic Phenomena Supermassive Black Holes Primordial Gravitational Waves LISA Mission Research Methods Dark Matter LISA Observatory Cosmic History Ultralow Frequency Gravitational Waves Interferometry Low-frequency Gravitational Waves Types LISA Sources Perturbation Theory Pulsar Timing Arrays Theoretical Foundations High-Frequency Gravitational Waves Merging Black Holes Wave Behavior Cosmic Events LIGO Detectors Laser Interferometry Cosmic Strings Accretion Disks Formation Stellar Mergers Wave Observations Gravitational Recoil Binary Coalescences LISA Spacecraft Einstein Telescope Scalar Fields Frequency Range Low-Frequency Gravitational Waves Observational Techniques Research Signal Analysis Black Hole Dynamics Data Collection Confirmation of Einstein's Theory Statistical Techniques Black Hole Collisions Neutron Star Physics Observational Astronomy Binary Inspirals Cosmological Phenomena Research Collaboration Wave Spectrum General Relativity Frequency Analysis Detection Protocols Black Hole Interactions Ultra-low Frequency Gravitational Waves Research Techniques Detectors Waveform Modeling Neutron Stars Origins Quasiperiodic Oscillations Astrophysical Signals Stochastic Background Space-Time Distortions Mass Transfer Gravitational Wave Background
Decades of radio imaging reveal a faint second jet consistent with a close pair now modeled on a 121-day orbit.
