They open at 10 no need to queue, the museum is very large
You had to queue but it goes fast. Keep in mind that the price they indicate for general admission is orientation, in principle you can pay whatever you want. You can also take advantage of the hours when access is free (just before closing)
The most recommended time is just when it opens at 10. If you go at noon and especially at the weekend you can find a queue of thousands of people like I came to see. You have a second option, which is the one that suited me very well and saves me a lot of time, which is to enter from the back, through the Planetary Museum that gives you access to everything in the museum but the queues are much shorter, in fact I did not find a tail.
I went on a Sunday at 2:00 p.m., it was not necessary to stand in line, normal and agile.
Before noon take out the lockers
Thanks! Your answer is awaiting moderation.