What is the purpose of light? How does light work? Why does light exist? This video explores the longstanding debate over ...

Light is well known to exhibit both wave-like and particle-like properties, as imaged here in this 2015 photograph. What's less well appreciated is that matter particles also exhibit those wave-like ...

Astronomers have detected two extraordinary gravitational wave events that may have come from black holes formed in earlier ...

Imprint of vol. II: Kiel, Astronomische Nachrichten; Lynn, Mass., Thos. P. Nichols & Son Co.; [etc., etc.] I. Bulletins 1 to 6 inclusive, announcing the discovery of ...

Are black holes, made famous by Stephen Hawking’s writings and research, actually real? Gravitational-wave astronomy is celebrating ten years of success this September 2025. And just in time for the ...