Most of the scientific investigations of Pluto by NASA’s New Horizons spacecraft took place over the course of a single day, when it zipped within 8,000 miles of the dwarf planet in July of last year.

Getting all that information back to Earth where scientists could study it took 15 months.

The last bits of data — an infrared scan of Pluto and its largest moon, Charon, that tells something about the composition of the two — arrived on Earth on Tuesday at 5:48 a.m. Eastern.

“Well, you know, in our hearts, it’s still there,” Alice Bowman, the missions operations manager, said of Pluto, “but our data is on the ground.”