Homunculus Nebula

The Homunculus Nebula is composed primarily of gas and cosmic dust ejected from the massive binary star system Eta Carinae. It consists largely of elements like nitrogen, carbon, and iron that were forged inside the dying star's core. This dust is slowly expanding outward into the surrounding space.

The nebula was violently formed during the 'Great Eruption' of Eta Carinae, which was observed by astronomers on Earth starting in the 1840s. During this event, Eta Carinae became the second-brightest star in the night sky as it blasted huge amounts of its own mass into space. The star survived the outburst, creating the two-lobed cloud we see today.

The Homunculus Nebula is located approximately 7,500 light-years away from Earth in the constellation Carina. It sits deep within the sprawling Carina Nebula complex, which is one of the largest star-forming regions in the Milky Way. The exact coordinates point to the southern deep-sky sky, visible primarily from the Southern Hemisphere.

The two massive lobes of the Homunculus Nebula stretch to a total length of about one light-year across. Despite its massive physical size, it appears very small from Earth due to its extreme distance. Its expanding gas is currently moving outward at a speed of roughly 2 million kilometers per hour.