Lü Yongchang suddenly slapped his own... thigh.
He had gotten stuck in a rut!
Why did he have to fixate on how to escape?!
Humanity could invade them instead!
At least in his previous life, no alien civilization from Proxima Centauri had appeared in the Solar System over the next twenty years!
In that case... as long as their technology advanced fast enough, humanity could head straight for Proxima Centauri!
What followed would naturally be interstellar war!
As long as they won that interstellar war, human civilization would gain the breathing room it needed to grow!
"P-Professor Lü?"
Beside him, Cao Liangcai watched Lü Yongchang suddenly grow excited, a strange look coming over his face.
This kid... hadn't been scared out of his mind, had he?
Lü Yongchang abruptly snapped back to reality.
Ignoring Cao Liangcai's strange look, he exclaimed excitedly, "I've got it! I've got it!!"
Cao Liangcai: "???"
"Y-you've got what?"
Cao Liangcai stared at Lü Yongchang in utter bewilderment.
Lü Yongchang took a deep breath, calming the excitement surging inside him.
He pondered for a moment, considering how to phrase it.
After all, he couldn't simply tell Cao Liangcai that they wouldn't need to worry about an invasion from the Proxima Centauri civilization for the next twenty years, could he?
Without any evidence, no one would believe him!
"Cao, think about it. How much thrust do our Hall Thrusters produce?" Lü Yongchang's eyes shone brightly. "Although we don't know how advanced the Proxima Centauri civilization's technology is, since they're using Hall Thrusters, we can roughly estimate their traveling speed."
"One-tenth the speed of light, at the absolute most!"
"What does that speed mean?"
Cao Liangcai's eyes gradually brightened, and he picked up where Lü Yongchang left off. "It means the craft on the Moon would need at