For the past 5 billion years, the expansion of the universe has been powered by a mysterious repulsive force known as dark energy.
The world.edu network focuses on education, science, innovation and the environment.
Here you can submit and vote on the best content from the world’s leading organisations and websites.
The case of the missing quasar gas clouds has been solved by a worldwide research team led by Penn State astronomers Nurten Filiz Ak and Niel Brandt.
The first evidence of a planet's destruction by its aging star has been discovered by an international team of astronomers.
The Sloan Digital Sky Survey III (SDSS-III), an international collaboration that includes Penn State astronomers, has produced the largest-ever three-dimensional map of massive galaxies and distant black holes.
A loose group of stars that has been known for more than 180 years but never before studied in detail has been revealed to be an important new tool in the quest to understand the evolution of stars like the Sun, and in the search for planets like Earth.
A new space telescope is scheduled to rocket into orbit during a launch window that begins at 11:30 a.m. EDT on June 13.