Missing a P in Olympus. 'Units of measurement' not accepted. 'Astronauts' not accepted. Disappointing all round.

Missing some letters and the answers are not accepted. The problem here is that the answer "astronaut" does not count and the explicit answer is "astronaut". Anyway, nice connections but maybe could have more tricky groups.

Nice grid, but...
Although I solved the wall in 30 secs, all of my answers were marked as incorrect, but contained the words you specify.
I think maybe the answers need widening.

Apart from that, good grid, nice spread of subjects

Thanks for posting

You gotta check your accepted answers before posting, you probably misspelled astronaut, do as suggested shorten to astro,nam,spac etc. Meter is US variant of metre which unless I missed something is distance not weight. Have another go.