The smallest time interval ever defined. Named after theoretical physicist Max Planck (1858-1947), Planck time is 10-43 seconds; however, the only measurement ever actually made was more than twice as ...

It's notexactly Doc Brown's DeLorean from "Back to the Future," but theEuropean Space Agency's (ESA) Planck Observatory will be something of a cosmictime machine after it launches this week. Planck ...

The Planck scale, whether referring to size, time, mass, or otherwise, is the smallest unit of the universe we can describe — or, perhaps, that even exists. Below these scales, our current theories ...

ON A human scale, an atom is inconceivably small. But size is relative. On the Planck scale—the smallest that physical theory recognises—atoms are huge. At this scale, named after Max Planck, the ...

Does time flow continuously, gliding without interruption from one happening to another? Or is it choppy and pixelated, an illusory phenomenon formed of innumerable discrete elements? The world of our ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. After hunting for the earliest clues about the evolution of the universe for more than four years ...

The Planck image shows how the sky looks at millimeter-long wavelengths. Red areas are brighter, blue areas are darker. The large red strips show the Milky Way. The small bright and dark spots far ...