NGC 2170, also known as the Angel Nebula, is a striking reflection nebula located in the star-forming region of Monoceros, approximately 2,700 light-years away. Unlike emission nebulae that glow due to ionized gas, reflection nebulae like NGC 2170 shine by scattering and reflecting the light of nearby hot, young stars. The nebula’s blue hues are the result of shorter-wavelength light scattering more effectively in the surrounding dust, similar to Earth's sky.

This RGB image showcases the nebula’s delicate structures, including interwoven dark filaments of cosmic dust and the warm glow of ionized hydrogen regions. NGC 2170 is part of the larger Monoceros R2 molecular cloud complex, an active stellar nursery where intense radiation and stellar winds shape the surrounding material. The intricate interplay of light and shadow in this region provides a glimpse into the early stages of star formation and the dynamic processes sculpting our galaxy.