NASA’s James Webb Space Telescope is “fully deployed,” according to the agency’s science administrator Thomas Zurbuchen — and that’s certainly a reason to celebrate after decades of hard work and tens of billions of dollars spent.

But the massive space observatory isn’t out of the woods just yet.

That’s unlike NASA’s Hubble Space Telescope, which the agency’s Space Shuttle visited five times between 1993 and 2009 for repairs and upgrades.

READ MORE: NASA thinks space junk will hit the James Webb Space Telescope — but it’s ok [Inverse]

More on the telescope: The James Webb Space Telescope Has Officially Started Unfolding Its Huge Golden Mirror