"mock space" is not a common or correct phrase in English.
It is unclear what the intended meaning or usage of this phrase would be. If you can provide more context or explain your intention for using this phrase, I can provide a more accurate answer or alternative suggestions.
Every few months, I make another try at a visually mesmerizing program called Personal Brain ($79.95 from TheBrain.com), which displays facts, ideas and research elements floating in a mock 3-D space, with lines indicating the connections among them.
The MIT-developed system operates in a scaled down model of a city block, complete with traditional roadways, buildings and mock green space.
"Challenging" and "offensive" don't seem quite the right words for this, which is shown in a foam-rubber lined, mock-up space capsule.
A series of tests are performed using a goniophotometer and spectrometer to investigate the photometric characteristics of the system in terms of luminous intensity distribution and spectral radiance, which are used in link with the actual photometric measurements for a lightless mock-up space of 4.9 m × 4.9 m × 2.6 m.
Russians are mocking their space program after the SpaceX launch / Greg Walters.
The test was intended to test elements to be used in the next attempt to shoot down a mock warhead in space.
A crucial flight test of the technology is set for next Friday, when a ground-based interceptor missile is to thunder aloft and try to destroy a mock warhead in space.
— Russians took to social media to mock their own space program and mega-yacht-buying billionaire set after Elon Musk's Falcon Heavy rocket sent a cherry red Tesla Roadster flying through the cosmos.
The New Yorker found a way to persevere, and merrily uses that space to mock the blunders of others.
