The Argus Array’s 900 telescopes will each watch a different patch of sky for rapid changes, from supernovae to the passing shadow of the hypothetical Planet 9. Learn more: ScienceVisuals
Argus Panoptes, the all-seeing, manyeyed giant of Greek mythology, is about to take physical form in the mountains of North Carolina. In October, an array of 38 small telescopes will begin monitoring a slice of visible sky 1700 times the size of the full Moon. Known as the Argus Array Pathfinder, it will register changes in the stars second by second, essentially making a nightlong celestial movie.
Argus aims to achieve its unique vision with hundreds of off-the-shelf telescopes, each just 20 centimeters across and watching a different patch of sky. The final array will match the light-gathering power of a telescope with a single 5-meter mirror, which typically costs hundreds of millions of dollars, but cheap components should keep Argus’s cost below $20 million, Law says. The challenge will come in stitching together the array’s 900 images into a single, seamless movie of the night sky.
Data from Argus Pathfinder and its successor will be freely available in real time, and the software will issue automatic alerts when it detects an event. That will allow other, larger telescopes to quickly swivel to the same spot in the sky and collect more detailed data, a boon for astronomers probing stellar outbursts such as flares, supernovae, and gamma ray bursts.
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