HETDEX: The Search for Dark Energy

Astronomers around the world are racing to devise clever and creative ways to learn the nature of dark energy.

An innovative set of spectrographs will observe thousands of galaxies each night

Karl Gebhardt, HETDEX Project Scientist, explains how a McDonald Observatory telescope will look for dark energy.

When it comes to explaining dark energy, scientists are in the dark.

An introduction to the Hobby-Eberly Telescope Dark Energy Experiment

In 1998, two teams of astronomers discovered that, instead of slowing down, the universe is expanding faster today than it was in earlier epochs.

An introduction to the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX).