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is a distant blazar (a type of galaxy with a high-energy jet) that has provided compelling evidence for a supermassive black hole binary .

Adopted in 1965, is the "Declaration on the Inadmissibility of Intervention in the Domestic Affairs of States". is a distant blazar (a type of galaxy

It allows a server to dynamically assign IP addresses and other configuration parameters to devices on a network. It strictly prohibits states from intervening, directly or

It strictly prohibits states from intervening, directly or indirectly, in the internal or external affairs of any other state. Astronomy: PKS 2131–021 Researchers found strong

To protect the sovereignty and political independence of nations and maintain universal peace. 4. U.S. Law: Title 7 and Title 42 Section 2131

This protocol is what allows your phone or laptop to connect to a Wi-Fi network and get internet access automatically without manual setup. 2. Astronomy: PKS 2131–021

Researchers found strong, sinusoidal variations in its brightness that have remained coherent for nearly 50 years.