FATMAP difficulty grade
Ride the Great Divide Express chairlift up to just below the summit of Brewster Rock/Lookout Mountain.
At the top of the chairlift is a gate which can only be opened by a turned-on avalanche transceiver.
As well as needing your transceiver you need a ski partner, a shovel and a probe, without which ski patrol will prevent you from going through the gate. Provided you have a ski partner and are correctly equipped, go through the gate and make the 5 minute hike up to Lookout Mountain.
From the summit of the mountain there are various entrances to Delirium, the steepest of which is is X-Dive.
For the Galaxy chutes however, you have options.
You can either continue down the ridge and metal staircase past the Dive Proper entrance and ascend Galaxy Ridge where you'll have a mandatory cliff drop to enter these various chutes.
This is a very very challenging option (and is the one depicted on screen) and should only be attempted by seriously experienced skiers.
A Galaxy Ridge entrance into a Galaxy Chute is probably the most challenging way to ski Delirium Dive in general.
The other, though slightly less interesting, way to ski these chutes is to take Dive Proper and cut hard skiers' right to access the bottom 1/2.
This is a very lackluster approach but it can be done if you'd like to at least try these lines.
The third and final approach to ski this line is to continue all the way to the top of Galaxy Ridge and initially drop into Milky Way but then cut hard skiers' right to access the full length of these chutes. Galaxy Chute #1 is the chute furthest lookers' left and Galaxy Chute #6 is the chute furthest lookers' right.
In general, the chutes get harder as their number becomes greater so Galaxy Chute #1 might be a good starting point before trying some of the other ones.