inestimable

Not able to be estimated; not able to be calculated, computed or comprehended, as because of great scale, degree or magnitude.

The Voyager spacecraft explored the solar system and continued into the inestimable space beyond.

He has refused to pass other Laws for the accommodation of large districts of people, unless those people would relinquish the right of Representation in the Legislature, a right inestimable to them and formidable to tyrants only.

Venerable, great.

On my arrival hither I found a letter from the inestimable Mr. Wythe, by which he informs me that in consequence of a late act of our general assembly he remains the sole judge of the high court of chancery.