High up in Chile’s Atacama Desert, miles away from the dull glow of light pollution, the secluded Atacama Cosmology Telescope is in prime position to search the sky for answers. The question most recently on its mind? The age of the universe, a cosmic quandary that can be answered in…
In 2004, astronomers spotted a unique celestial feature that, when observed in ultraviolet, bore the appearance of a glowing eye staring directly back at Earth. Unbeknownst to them, it would take 16 years to figure out what caused the Blue Ring Nebula to form.