Physics

Physics is the science of matter, energy, space and time. It looks both inward and outward, from the smallest subatomic particle to the vastness of the universe—and yet it is also intensely practical. Physics begins with the everyday physical world around us—the blue of the sky, the colors of the rainbow, the fall of an apple, the motions of the moon. What's happening here? Why do things work this way?

Here's what an Antarctic ice shelf sounds like

Winds blowing across snow dunes on Antarctica's Ross Ice Shelf cause the massive ice slab's surface to vibrate, producing a near-constant drumroll of seismic "tones" scientists could potentially use to monitor changes in the ice shelf from afar, according to new research

Using frequency combs to search for planets

The hunt for Earth-like planets, and perhaps extraterrestrial life, just got more precise, thanks to record-setting starlight measurements made possible by a National Institute of Standards and Technology (NIST) "astrocomb"

Event Horizon Telescope's monumental discovery, explained

The Event Horizon Telescope (EHT) -- a planet-scale array of eight ground-based radio telescopes forged through international collaboration -- was designed to capture images of a black hole. On April 10, in coordinated press conferences across the globe, EHT researchers revealed that they have succeeded, unveiling the first direct visual evidence of a supermassive black hole and its shadow

What is a black hole?

What is a black hole? Hans Krimm, an observational astronomer at the National Science Foundation, answers the question on this edition of "Ask a Scientist."

How the seeds of planets take shape

In theoretical research that could explain everything from planet formation to outflows from stars to even the settling of volcanic ash, Caltech researchers have discovered a new mechanism to explain how the act of dust moving through gas leads to clumps of dust

Polymer coating cools down buildings

Columbia engineers have made white paint whiter -- and cooler -- by removing white pigment and inventing a polymer coating, with nano- to microscale air voids, that acts as a spontaneous air cooler and can be fabricated, dyed and applied like paint