Astronomers in Hawaii have photographed the most distant object ever seen.
Subsequent examinations of the gamma-ray burst were taken from two ground-based telescopes located on Mauna Kea, Hawaii: the United Kingdom Infrared Telescope and the Gemini North telescope.
Astronomers using these telescopes were able to look at the burst's infrared light afterglow to determine the distance of the explosion based on its redshift, or how much the light's wavelength had stretched towards the red end of the spectrum in response to the expansion of the universe. Just as the sound of a radio from a car moving away from us sounds stretched out, so too does light shift to a longer wavelength as its source moves farther away. Since the universe is expanding, faraway objects are moving away at a faster rate than those closer to us, and so their redshift is correspondingly higher.
I just love how they figure these things out.