What is a betta fish? Betta fish—also known as Siamese fighting fish—are among the oldest species of domesticated fish. Their scientific name, Betta splendens, combines two languages ...

A star’s shifts in luminosity, for example, allows experts to use them as “cosmic rulers” to measure distances between galactic entities, which then helped generate an accurate 3D view of ...

We can now measure the CMB—our single greatest piece of evidence about cosmic history—with a precision unimaginable at the turn of the millennium. We have mapped the distribution of galaxies ...

Cosmic inflation is a faster-than-light expansion of the universe that spawned many others. Inflation was invented to explain a couple of features of the universe that are really hard to explain ...

Cosmic rays are particles from outer space that travel across the universe. They can be made by the sun, by other stars exploding, and even black holes. They move extremely fast, nearly the speed of ...

But one in particular, cosmic horror, is a bit harder to define—and that’s the entire point. Here, we dive into the weird worlds of cosmic horror, discuss films that define the genre onscreen ...

An artist’s animated tour of Porphyrion, the biggest set of cosmic jets yet discovered. The jets shoot out from opposite sides of a black hole at the heart of a massive galaxy 7.5 billion light ...

This Cosmic Microwave Background Radiation (CMBR) is the conclusive evidence for the Big Bang theory. The 'temperature' of deep space has been measured as around 3K, not absolute zero, due to the ...

Seen on a diagonal tilt, the galaxy appears to be swinging like a pendulum through space. A dazzling new image from the Hubble Space Telescope captures a bright spiral galaxy on a diagonal tilt ...

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These objects are thought to be a source of galactic cosmic rays, the origins of which are currently a mystery. Understanding how this microquasar works could also help researchers learn more ...