Prompt: An intrepid astronaut stands against the cosmic backdrop, pointing decisively into the unknown. The space suit glistens with reflections of distant stars, and the helmet visor reveals a determined expression. For this photograph, use an [f-stop] of 4.5 to create a shallow depth of field, capturing the astronaut in sharp focus while blurring the cosmic expanse. Set the shutter speed to [1/500] to freeze any potential movement, and maintain an ISO rating of [400] for optimal exposure. Illuminate the scene with natural sunlight, casting dynamic shadows on the astronaut's suit. Allow the cosmic background to subtly enhance the atmosphere, creating a captivating interplay of light and shadows.