What is a space portal look like?

A space portal often appears as a shimmering, swirling vortex or a glowing archway that seems to distort the surrounding space. It may emit light in various colors, creating an ethereal, otherworldly effect. The edges might be defined by intricate patterns or energy fields, suggesting a connection to another dimension or location in the universe. Overall, it evokes a sense of mystery and advanced technology, inviting exploration beyond the known realms.