A hamburger with a tail

The Edge-On Profile of NGC 3628 in Leo

Located roughly 30 million light-years away in the constellation Leo, NGC 3628 is celebrated for its distinctive edge-on spiral orientation and thick obscuring dust lane, earning it the nickname 'Hamburger Galaxy.' Imaged by Dave Doctor from Las Cruces, New Mexico, this cosmic structure provides a detailed look at the aftermath of sustained gravitational encounters within a compact galactic group.

A 300,000-Light-Year Tidal Stream

As a member of the Leo Triplet alongside spiral galaxies M65 and M66, NGC 3628 has undergone severe gravitational tugging. These past tidal encounters stripped stars and interstellar gas from the main disk, unravelling a faint, sweeping tidal tail that extends about 300,000 light-years into the surrounding medium. Capturing this tenuous structure requires deep imaging capable of tracing extremely low surface brightness features.

Windows into Galaxy Group Dynamics and Evolution

The immense tidal appendage of NGC 3628 serves as compelling evidence of how close encounters reshape galactic morphologies and disperse stellar populations into intergalactic space. Observations of the Leo Triplet provide astronomers with critical empirical data for testing numerical simulations of galaxy mergers and tidal force dynamics across billions of years.