Jasper National Park holds designation as the world's second-largest dark sky preserve, spanning 11,000 square kilometres of protected night sky where light pollution measures below 21.0 magnitude per square arcsecond. The Jasper Planetarium opened in 2019 at the base of Whistlers Mountain, replacing seasonal telescope programs that had operated intermittently since the park's 1907 establishment. Its 40-seat dome theatre projects 8K resolution star maps calibrated to real-time celestial positions, synchronized with a retractable roof that opens to the actual sky when atmospheric conditions permit. The planetarium's location at 1,060 metres elevation places it above the inversion layer that traps moisture in the Athabasca Valley, yielding clear viewing conditions on approximately 240 nights per year. Autumn and winter sessions between September and March offer the longest observation windows, with darkness descending by 18:00 and aurora borealis activity peaking during equinox transitions. The facility operates five distinct astronomy programs: dome theatre presentations explaining constellation mythology and planetary motion, guided telescope sessions using 8-inch and 14-inch Celestron reflectors, Dark Sky photography workshops teaching long-exposure technique, private stargazing tours with dedicated interpreters, and seasonal aurora tracking expeditions when geomagnetic activity exceeds KP index 4. Jasper's night sky reveals objects invisible from lower latitudes or light-polluted regions. The Andromeda Galaxy appears as a faint smudge to the naked eye, resolving into a spiral structure through the planetarium's largest telescope. The Pleiades cluster shows not seven stars but over thirty. Saturn's rings separate into distinct bands, and Jupiter's four Galilean moons track visibly across a single observation session. Winter visitors witness Orion rising from the southeastern horizon by 19:00, with the Orion Nebula glowing pink-violet through filtered eyepieces. Summer brings the Milky Way's galactic core directly overhead, a river of ancient light stretching from Sagittarius to Cygnus. The Canadian Royal Astronomical Society designated Jasper a Dark Sky Preserve in 2011, imposing strict ordinances on exterior lighting within park boundaries. Streetlights use downward-facing fixtures with amber filters that minimize blue-spectrum scatter, and commercial properties must shutter illuminated signs after 23:00. These measures have preserved a night environment approaching pre-industrial darkness levels, where the Milky Way casts ground shadows and zodiacal light glows along the ecliptic plane. Telescope programs at Jasper Planetarium operate year-round, adapting to seasonal celestial events—the Perseids in August, the Geminids in December, and rare planetary alignments visible only from northern latitudes.