The eyepiece (bottom) of the massive Subaru telescope.
Carting Instruments Around
The custom-built cart that moves along a track to change out the instruments on the bottom of the Subaru telescope.
Subaru's secondary mirror (the dome above it is closed).
Enormous vents throughout the building keep the temperature the same while barring dust, debris, and fast-blowing winds.
The Dome Door
The door to the dome: how Subaru peers out at the heavens above.
Tracks in the floor leading to the large silver doors of the instrument storage rooms.
Instrument Swap Demo
Nemanja "Nem" Jovanovic demonstrates how the crane changes out the instruments.
Space.com contributor Nola Taylor Redd couldn't resist taking this epic selfie in the mirror of one of Subaru's instruments.
An image of the instrument mirror.
The control console looks like a throwback to the '70s, but Jovanovic said similar machines are common in telescopes around the world.