What is the name of this Lego Blacktron anime/cartoon?
Maybe this question would better fit the Science Fiction &amp; Fantasy or MovieStack Exchange, as it's more about the tv-series you're looking for than about LEGO, which just reminds you of that symbol.

Zelda

It absolutely looks like the Triforce of the video game series Zelda. There also was a Zelda cartoon in the late 1980s / early 1990s. To this point, it seems to fit to your memory &mdash; but sadly there's no connection to spaceships, so I assume you where thinking of something else.

Starcom

I found something else: Starcom: The U.S. Space Force. It's an animated series from the 1980s, which totally looks like what you're searching: