Müller-Sánchez’s team also shows how these “winds” have helped to create NGC 6240’s most tell-tale feature: a massive cloud of gas in the shape of a butterfly ... outflow of low ionization gas from ...

NASA Explains How Butterfly Nebula Originated And Got Its Wings Most planetary nebulae are roughly circular, but a few have an hourglass or wing-like shape, like the aptly named 'Butterfly Nebula'.

Black hole and stellar winds form giant butterfly, shut down star formation in galaxy. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2018 / 04 / 180418141517.htm.