NGC 7733-34: A Glimpse into the Cosmic Ballet of Galaxies

Immerse yourself in the realm of interstellar interactions by exploring NGC 7733-34 also known as Arp Madore 2339 661 a captivating cluster of galaxies that have caught the attention of astronomers. Located about 500 million years away in the Tucana constellation these galaxies were first observed by John Herschel on November 2 1884.

Delve deeper into this ensemble and discover NGC 7733 (PGC 72177) a spiral barred galaxy that stretches an impressive distance of 175,000 light years. Upon examination you'll find an enchanting sight—a multitude of knots scattered along its spiraling arms showcasing its dynamic nature. Notably it possesses a galactic nucleus and is classified as a type II Seyfert galaxy. Engaging in a cosmic dance with its neighboring counterpart NGC 7734 at a distance similar to that between the Magellanic Clouds—approximately 157,000 light years.

On the hand there's NGC 7734 (PGC 72183) another spiral barred galaxy slightly larger with a span of approximately195,000 light years. What sets this galaxy apart are its peculiar spiral arms—a feature resulting from its interaction with NGC 7733. Moreover the presence of knots, within NGC 7734 adds another layer to its complexity.

It's interesting to note that the analysis of data shows a difference in the ages of two galaxies, NGC 7733 and NGC 7734. NGC 7733 appears to have a population of stars compared to NGC 7734.

As we delve into our exploration we are treated to a composite optical image of NGC 7733 34. This mesmerizing image is created by combining data captured by the Hubble Space Telescope and the Victor M. Blanco 4 meter telescope at Cerro Tololo Inter American Observatory in Chile. The image beautifully showcases NGC 7734 in the left section while NGC 7733 is positioned in the lower right corner. As you examine NGC 7733 closely you will notice another galaxy called NGC 7733N nearby. Initially it may appear as part of NGC 7733 or a companion to the pair. However upon analysis of its color and subsequent research it becomes evident that NGC 7733N is actually a background galaxy unrelated, to NGC 7733.

Image Credit: A collaborative effort from ESA/Hubble & NASA, J. Dalcanton, and Dark Energy Survey/DOE/FNAL/NOIRLab/NSF/AURA, with due acknowledgement to L. Shatz.