According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

If the universe is expanding, then what is it expanding into, and what is it expanding from? Where's the edge of the universe ...

According to the model, dark matter may have started as particles that were hot, light, massless, and fast. As the universe ...

Below the waves of the Mediterranean, Europe's KM3NeT neutrino telescope is on a cosmic hunt. Towering strings of sensors ...

A Hiroshima University team has designed a feasible way to detect the Unruh effect, where acceleration turns quantum vacuum fluctuations into observable particles. By using superconducting Josephson ...

Nearly 50 years ago, physicists floated a bold idea: our universe might be stuck in a false vacuum. This state feels stable, but deep down, it's not. Over enormous timescales, it could suddenly tip ...

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star ...

For years, scientists have viewed our solar system as isolated within the vast emptiness of space. But recent findings have revealed a surprising discovery—a “cosmic tunnel” connecting our solar ...

A monster galaxy from the early universe shows that the cosmos was rich with oxygen when it was only less than 3% of its present age, astronomers have found. The discovery raises questions about how ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. About a century ago, scientists were struggling to ...