The homunculus is the remnant of an explosive event involving the star Eta Carinae. It is embedded in the much larger Carina Nebula. Wikipedia has an excellent article about this object at:
https://en.wikipedia.org/wiki/Homunculus_Nebula
This image was compiled from forty exposures using a Celestron EdgeHD 8-inch SCT and an ASI2600MCPro camera mounted on a ZWO AM5 (apologies for poor quality focussing). Embiggened version at:
https://app.astrobin.com/i/ps3372
Tim Anderson