Question

lets aim for mars by buzz aldrin. what does aldrin mean when he says weve been locked in earth orbit? that astronauts cant come home that our missions are too focused on the moon that we are too busy trying to solve our problems on earth that we are limited to flying in earths atmosphere

Explanation:

The phrase "locked in Earth orbit" implies that space - missions have been overly concentrated on Earth - centric activities like lunar missions instead of venturing further to Mars. It doesn't mean astronauts can't come home, being too busy with Earth problems, or being limited to Earth's atmosphere.

Answer:

That our missions are too focused on the moon