De or het raketlancering?

The correct Dutch article is:

de raketlancering

Rule Words ending in -ing: almost always de. See the rule

How to use raketlancering

the raketlanceringde raketlancering
this raketlanceringdeze raketlancering
that raketlanceringdie raketlancering
our raketlanceringonze raketlancering
your raketlanceringjouw raketlancering
every raketlanceringelke raketlancering
which raketlancering?welke raketlancering?
a big raketlancering / the big raketlanceringeen grote raketlancering, de grote raketlancering