Six years ago, on assignment from Dutch concert hall Muziekgebouw Eindhoven, Nico Muhly, the National’s Bryce Dessner, and Sufjan Stevens began working on what would become a project of near-endless proportions. By 2012, their songs about the solar system were debuted in the Netherlands, reprised at Brooklyn Academy of Music, and live workshopped at Dessner’s MusicNOW Festival in Cincinnati. The trio performed with percussionist James McAlister while visual artist Deborah Johnson’s fluorescent animations projected onto a black orb floating overhead. For all intents and purposes, it seemed like a piece strictly meant for a live setting—until a few tweets and interviews confirmed that Planetarium remained a work in process, much to the delight of fans who’d closely tracked the endeavor.

Now, as 4AD confirmed yesterday, the collaboration will seebottom chamber of the filtering component after the plunger was pulled out. Then, the plunger was inserted into the upper chamber of the filtering component and pulled down. The filtering component is hermetic except at the exit of the bottom chamber, where a filter membrane is positioned. Ethanol was squeezed out during extrusion of the plunger. After the plunger was pulled and pushed for several times, the liquid was filtered from the Ni-NTA agarose. Then, ultra-pure H~2~O was added into the filtering component and Ni-NTA agarose was thoroughly washed thrice. The enzyme solution was poured in and incubated with Ni-NTA agarose for several minutes to immobilize the enzyme on the resin. The remaining enzyme solution was then pumped out. Finally, MP solutions of different concentrations were added to