As I gazed through the small window of the International Space Station, I couldn't believe my eyes. Hovering just outside was an alien spaceship unlike anything I've ever seen. Its sleek, shimmering surface seemed to change colors, creating a mesmerizing spectacle. The spaceship was shaped asymmetrically, defying any earthly notion of aerodynamics. As fear mixed with excitement, I knew this encounter would change humanity's understanding of our universe forever.
You are an astronaut aboard the ISS witnessing an alien spaceship for the first time. Describe the spaceship and your impressions.