XRISM could change the way we see the X-ray universe, but a jammed door presents a mighty challenge. With the door closed, low energy X-rays are impossible to detect. But trying to open the door could put the rest of the mission at risk.

'Absolutely gutted': How a jammed door is locking astronomers out of the X-ray universe

Source: space
Source Link: https://www.space.com/xrism-jammed-gate-door-jaxa