Walt Disney wanted to build Space Mountain at Disneyland a decade before the indoor roller coaster forever altered the skyline of the Magic Kingdom a few years after the debut of the Florida theme park. Disney’s Magic Kingdom theme park will celebrate the 50th anniversary of Space Mountain on Wednesday, Jan. 15.

Space Mountain is one of the most recognizable theme park attractions around the world, but here’s what you may not know about the beloved ride.

A cultural touchstone, the dark ride opened to the public on Jan. 15, 1975, three years and three months after the Magic Kingdom’s debut.

For fifty years now, guests to Magic Kingdom have had the chance to travel amongst the stars when riding Space Mountain. The iconic Tomorrowland coaster opened on January 15, 1975

Apparently, it does not end with them. The fallout radius of the Blake Lively and Justin Baldoni legal battle continues to spread, with Marvel president Kevin Feige, Disney CEO Bob Iger and director Tim Miller becoming the latest industry figures swept into the drama. On Jan. 7, Baldoni’s lawyer Bryan Freedman sent a litigation hold …

• Jan. 15, 1975: Space Mountain opened at a cost of $15 million, the Sentinel reported, “an amount more than the whole cost of Disneyland, built in 1955.” Astronauts Scott Carpenter, James Irwin and Gordon Cooper posed with Mickey Mouse, who is decked out in a spacesuit.

This year marks the 50th anniversary of Space Mountain at Walt Disney World and some brand new pins are available.