The telescope was also instrumental in the discovery of dark energy, a little-known but ubiquitous force that works against gravity and contributes to the ongoing expansion of the universe.

But to a car-size telescope 26 million miles (41.8 million kilometers) from Earth, they are alive with light—infrared light, or heat rays. Since its launch in August 2003, says Robert Kennicutt ...

This telescope was used on board HMS Discovery during the British Arctic Expedition from 1875-76. It was also used on Captain Robert Falcon Scott's National Antarctic (Discovery) Expedition from ...