Hubble Views Lenticular Galaxy NGC 3156: A Celestial Marvel



In a stunning cosmic revelation, the NASA/ESA Hubble Space Telescope has unveiled a mesmerizing portrait of NGC 3156, a colossal lenticular galaxy that graces the celestial canvas in the relatively obscure equatorial constellation of Sextans. This remarkable galaxy, residing a staggering 73 million light-years away from our Blue Planet, offers a captivating glimpse into the enigmatic depths of the universe. Let’s embark on a celestial voyage to uncover the mysteries of Lenticular Galaxy NGC 3156.

Sextans: A Stellar Backdrop

Nestled within the tapestry of the night sky, Sextans is a small constellation, part of the distinguished Hercules family of constellations. Its name is derived from the elegant navigational tool known as the sextant. While often associated with 18th-century seafaring, the history of the sextant in astronomy is far older. Islamic scholars pioneered the use of astronomical sextants centuries before, using them to measure celestial angles. A remarkable relic from this era still stands in Samarkand, Uzbekistan—a colossal sextant with a breathtaking 36-meter radius, created by Ulugh Beg during the fifteenth century. These early sextants may have evolved from Ptolemy’s quadrant, fundamentally changing how we perceive the cosmos. However, in the modern age of astronomy, these instruments have gracefully yielded to more precise technological marvels.

NGC 3156 is a lenticular galaxy situated in the Sextans constellation, located approximately 73 million light-years away from Earth. Lenticular galaxies are a type of galaxy that falls between elliptical and spiral galaxies in terms of their appearance. They have a smooth, disk-like structure, but they lack the spiral arms characteristic of spiral galaxies.

NGC 3156: Unveiling a Celestial Gem

NGC 3156, also known as LEDA 29730 or UGC 5503, entered the astronomical stage on December 13, 1784, when the diligent gaze of the German-British astronomer William Herschel first captured its radiance. This lenticular galaxy, which shares the cosmic canvas with the spiral beauty NGC 3169, finds its place within the NGC 3166 group of galaxies. These galaxies, in turn, are part of the larger Leo II groups—a complex network of galaxies and galaxy clusters that extends from the right edge of the Virgo Supercluster. The Hubble Space Telescope’s image of NGC 3156 reveals the galaxy’s smooth disk and its bright nucleus. Additionally, the image unveils several dust lanes that obscure the view of the galaxy’s central regions.

Hubble Views Lenticular Galaxy NGC 3156: A Celestial Marvel

The Secrets of NGC 3156

NGC 3156 hasn’t just been a casual object of astronomical curiosity. Astronomers have painstakingly investigated its mysteries, delving deep into the realms beyond its exact coordinates. This galaxy boasts a collection of globular clusters, each a sparkling treasure chest of celestial jewels. Moreover, NGC 3156 has recently given birth to new stars, serving as a testament to the cosmic interplay of creation and destruction that unfolds within its boundaries. Yet, perhaps the most captivating aspect lies at its core—a supermassive black hole that voraciously devours stars with ruthless efficiency. Lenticular galaxies like NGC 3156 are believed to form through interactions between spiral galaxies and other galaxies, or through galaxy mergers. These interactions or mergers can disrupt the spiral arms of the galaxy, resulting in the smooth, lens-like appearance that characterizes lenticular galaxies.

NGC 3156 is a relatively youthful galaxy that is currently in the process of forming stars. The Hubble Space Telescope’s image of this galaxy reveals several vivid blue star clusters within its disk. These star clusters serve as the birthplaces of young, hot stars that are radiating their brilliance brightly in the cosmic tapestry.

The Hubble Space Telescope’s image of NGC 3156 offers a stunning and informative glimpse of this lenticular galaxy. This image provides valuable insights into the galaxy’s structure, its ongoing star formation activity, and its evolutionary history.


Here are some additional key facts about NGC 3156:

  1. It boasts a diameter spanning approximately 100,000 light-years, giving it a substantial cosmic footprint.
  2. NGC 3156 possesses a mass of roughly 100 billion solar masses, underscoring its considerable gravitational influence.
  3. It falls into the classification of an S0 galaxy, signifying its lenticular nature with a smooth disk and an absence of spiral arms.
  4. NGC 3156 is situated within the constellation Sextans, positioned in the southern celestial hemisphere.
  5. This galaxy was initially discovered by the renowned astronomer William Herschel in the year 1784, cementing its place in the annals of astronomical history.

FAQs: Lenticular Galaxy NGC 3156

Q1: What is a lenticular galaxy?

A1: Lenticular galaxies, such as NGC 3156, are celestial entities that exhibit characteristics of both spiral and elliptical galaxies. They possess a disk-like structure akin to spirals but lack the prominent spiral arms.

Q2: How far is NGC 3156 from Earth?

A2: NGC 3156 resides a staggering 73 million light-years away from our planet, nestled in the constellation of Sextans.

Q3: What is the significance of Sextans in astronomy?

A3: Sextans, a small constellation, is named after the sextant, an ancient navigational instrument. Islamic scholars utilized astronomical sextants for celestial measurements long before their nautical counterparts.

Q4: Who discovered NGC 3156?

A4: NGC 3156 was first discovered by the renowned German-British astronomer William Herschel on December 13, 1784.

Q5: What is the NGC 3166 group of galaxies?

A5: The NGC 3166 group of galaxies is a collection of celestial bodies, including NGC 3156 and NGC 3169, nestled within the larger Leo II groups—a part of the intricate cosmic tapestry.

Q6: What lies at the heart of NGC 3156?

A6: NGC 3156 conceals a supermassive black hole at its core, responsible for the relentless destruction of stars within its gravitational grasp.



In the vast tapestry of the cosmos, NGC 3156 shines as a celestial jewel—a lenticular galaxy whose fascination goes far beyond its captivating looks. From the ancient origins of the sextant to the enigmatic depths of black holes, this cosmic wonder calls us to delve into the countless facets of the universe. As we journey through the cosmos, NGC 3156 stands as a testament to humanity’s unending curiosity and the profound enigmas that await our exploration in the immense expanse of space.



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