A group of students are carrying out an experiment in space to settle once and for all the validity of the long-held theory that sound cannot be heard in a vacuum. The team from the Cambridge ...

Dark energy and I came of age together. In 1998, two competing groups of astronomers discovered that the expansion of the universe was accelerating; the same year, I graduated from college with a ...

HANOVER, N.H. -- Black holes are regions of space-time with huge amounts of gravity. Scientists originally thought that nothing could esca­­­­­pe the boundaries of these massive objects, including ...

This Hubble Space Telescope image shows one of the galaxies in the survey to refine the measurement for how fast the universe expands with time, called the Hubble constant. NASA, ESA and A. Riess ...

A group of students are carrying out an experiment in space to settle once and for all the validity of the long-held theory that sound cannot be heard in a vacuum. The team from the Cambridge ...