yeah the entire universal century timeline, which is the 79 gundam, zeta gundam, zz gundam, char's counter attack and unicorn. so around 150 episodes plus the side content that is optional.
Okay thanks for your answer so i guess i have to say goodbye to my precious life time xD
For the first gundam show, it's viable to watch this movie trilogy to make it go by quicker instead of watching all 40-something episodes. But the tv show is good too.
Mobile Suit Gundam I
Mobile Suit Gundam II Soldiers of Sorrow
Mobile Suit Gundam III Encounters in Space