Visitors walk through a tunnel Sunday at the Shanghai Astronomy Museum. Photo: VCG

A visitor looks an exhibit Sunday that illustrates the cosmic microwave background, the radiation pervading the universe that is the theorized to be leftover from the big bang. Photo: VCG

Visitors read about the solar system Sunday. Photo: VCG

A boy checks out a model on display at the museum. Photo: VCG

A kid takes photos for installations that introduce sizes of particles in the universe at the museum in Shanghai. Photo: VCG

Visitors get a look at a life-size model of the core module of China’s Tiangong space station Sunday at the museum. Photo: VCG

Visitors get introduced to China’s lunar exploration program. Photo: VCG

Visitors walk up the museum’s spiral ramp, which mimics the orbits of celestial bodies. Photo: IC Photo

The Sphere, the theater of the planetarium, is partially merged with the museum’s main building. Photo: VCG

Visitors line up outside the museum Sunday. Photo: VCG

The museum’s design features curvilinear shapes to reflect the geometry of the universe. Photo: VCG