Common mistake, but it is just ESA, not "the ESA". Just as it is NASA and not "the NASA".
Prepositions are fascinating. Why is it that NASA and ESA don't get a "the" but the Sun, Earth, Moon and USA do? Why does it always feel wrong when Apple doesn't use "the" before iPod, iPhone, etc?
0. https://academicguides.waldenu.edu/writingcenter/grammar/pre...
https://academicguides.waldenu.edu/writingcenter/grammar/art...