Colossal alien spacecraft racing through glowing deep space

A large, alien spacecraft, resembling a massive, elongated seed or a futuristic asteroid, hurtles through the vast expanse of deep space. The vessel is dark, metallic, and intricately detailed with complex paneling and rows of glowing blue lights. A trail of luminous, ethereal blue-white gas or plasma streams from its rear propulsion system, illuminating the surrounding darkness and creating a sense of immense speed and power. The spacecraft is positioned on the right side of the frame, angled to face towards the left, with its front partially obscured by the bright exhaust plume. The background is a deep, star-filled cosmos, with a scattering of distant stars and a faint, colorful nebula in the upper right corner, rendered in dark blues, purples, and hints of teal. The lighting is dramatic, with the spacecraft's blue lights and the bright rear exhaust casting a cool glow. The perspective is cinematic, slightly below and to the side of the craft, emphasizing its colossal size and its journey through the unknown. The overall atmosphere is one of awe, mystery, and advanced interstellar travel.