Astronomers have directly measured the mass and velocity of an isolated black hole for the first time using gravitational lensing.
Using a superconducting X-ray laser, researchers at SLAC achieved a temperature 4 degrees Fahrenheit above absolute zero.
Massive gravitons may have formed a trillionth of a second after the Big Bang, in abundances great enough to account for dark matter.
Reference The sun is the solar system's central star and enables all life on Earth to exist and flourish.
Reference As long as humanity has been gazing at the stars we have dreamed about life on other worlds, now known as exoplanets.
The Geiger-Marsden experiment, also called the gold foil experiment, gave physicists their first view of the structure of the atomic nucleus.
From worlds that rain iron and glass to diamond worlds and planets that have escaped the grip of their parent stars, here are 10 of the most extreme alien planets.