The James Webb Space Telescope — minus the telescope — recently underwent another round of testing. (Credit: NASA/Chris Gunn)

The James Webb Space Telescope (JWST) is NASA’s long-planned – and long-delayed – successor to Hubble. But after a recent spate of testing to mimic the extremes of space, it’s looking like the telescope is still on track for its 2021 launch date.

The telescope itself, along with its instrumentation, passed many of its final tests last year, before being delivere