Here's awesome time-lapse footage of a single evening from the in-development ALMA Array Operations Site, the largest astronomical project in human history which happens to sit at 5000 meters on the Chajnantor plateau in Chile.

Here's a decription of what you're seeing from the ESO:

As the Moon sets at the beginning of the night, three of the first ALMA antennas start tests as part of the ongoing Commissioning and Science Verification process. Because they are pointing at the same target in the sky at any moment, their movements are perfectly synchronised. As the sky appears to rotate clockwise around the south celestial pole (behind the rightmost, stationary antenna), the centre of the Milky Way, initially visible in the upper left as a yellowish bulge crossed by dark dust lanes, disappears from view. Then, the Small and Large Magellanic Clouds, two neighbouring galaxies of the Milky Way, rise from behind the two antennas on the right. The flashes on the ground are the car lights of the guards patrolling at the AOS.

Click through the gallery to watch videos of the night sky at ALMA from different angles.

[Via reddit]