The character is a fictional astronaut who has trained and flown missions in space, but the show doesn't depict him floating in a weightless environment.
There are a few instances where the show may have given the impression of floating:
* Spacewalk Scenes: The show used special effects and harnesses to simulate the feeling of weightlessness during spacewalks, but these were visual effects rather than actual floating.
* Humorous Moments: The show sometimes played with the idea of Howard's "floating" in a comedic way, but again, this was never presented as genuine.
Overall, Howard Wolowitz, like any astronaut, experiences weightlessness during space travel. However, the show used creative techniques to portray this, but he never actually floats in the way you might imagine.