R136 is a massive star cluster located in the 30 Doradus Nebula, which is part of the Large Magellanic Cloud (LMC), a satellite galaxy of the Milky Way. The 30 Doradus Nebula is also known as the Tarantula Nebula due to its spider-like appearance.

Here are some key points about R136 and the 30 Doradus Nebula:

1. Location: The 30 Doradus Nebula is situated in the Large Magellanic Cloud, a dwarf galaxy that orbits the Milky Way. The nebula is one of the largest and most active star-forming regions in our local group of galaxies.
2. R136: R136 is the designation for the central concentration of stars within the 30 Doradus Nebula. It is a massive young star cluster, and at its core lies one of the most massive and luminous star clusters known.
3. Massive Stars: R136 contains some of the most massive and luminous stars ever discovered. The cluster is home to a large number of O-type and Wolf-Rayet stars, which are hot, massive, and emit intense radiation.
4. Tarantula Nebula: The 30 Doradus Nebula, including R136, is often referred to as the Tarantula Nebula due to its intricate, spider-like appearance when observed in visible light.
5. Hubble Space Telescope Observations: The Hubble Space Telescope has provided detailed and stunning images of the 30 Doradus Nebula, capturing the intricate structures and the massive stars within R136. These observations have greatly contributed to our understanding of stellar formation and evolution in extreme environments.
6. Star Formation: The 30 Doradus Nebula is a region of active star formation, and the intense radiation and stellar winds from the massive stars within R136 influence the surrounding gas and dust, shaping the nebula and triggering further star formation.

Studying regions like R136 and the 30 Doradus Nebula helps astronomers understand the processes involved in massive star formation, the dynamics of star clusters, and the effects of massive stars on their cosmic environments.