Galaxies have been experiencing vigorous bursts of star formation from much earlier in cosmic history than previously thought, according to new observations.
When running at maximum observational power, ALMA will see the universe in a resolution 10 times greater than that of Hubble Space Telescope. Its altitude - above 40% of Earth's atmosphere - is part of what makes it so powerful.
On March 11, Earth passed in front of the sun as seen from the orbiting observatory. Then the moon passed in front of the sun, later that same day. Cool photos here.