T. P. Bhaskaran, an eminent Indian astronomer, made significant contributions to the field of gaseous nebulae spectroscopy. His research focused on understanding the physical conditions and chemical composition of these nebulae.

U. R. Rao, a renowned Indian astronomer, conducted extensive observations of the Orion Nebula. His work provided valuable information about the nebula's emission lines, helping to unravel its structure and dynamics.

T. K. Menon, an Indian astronomer, proposed the 'Menon Model' to explain the excitation of hydrogen atoms in gaseous nebulae. This model provided a theoretical framework for understanding the emission lines observed in these objects.

J. C. Bhattacharyya, an Indian astronomer, made significant contributions to the study of polarization of light from nebulae. His research provided insights into the magnetic fields and dust grain alignment within these celestial objects.

R. N. Iyengar, an Indian astronomer, conducted extensive research on the chemical composition of planetary nebulae. His spectroscopic observations helped determine the abundances of various elements, providing insights into the nucleosynthesis processes occurring within these objects.

A. K. Das, an Indian astronomer, made significant contributions to the study of the kinematics and dynamics of gaseous nebulae. His spectroscopic observations provided valuable information about the radial velocities and motions of these objects, helping to understand their physical properties.

S. K. Gupta, an Indian astronomer, conducted extensive research on the infrared emission from nebulae. His work provided insights into the properties of dust grains and the role of infrared radiation in the evolution of these celestial objects.

D. K. Biswas, an Indian astronomer, made significant contributions to the theoretical understanding of planetary nebulae formation and evolution. His models incorporated the effects of stellar winds and radiation pressure, providing insights into the dynamics and morphology of these objects.

Govind Swarup, an eminent Indian astronomer, made significant contributions to the study of radio emission from nebulae. His observations using radio telescopes provided valuable information about the distribution and properties of ionized gas and magnetic fields within these objects.

K. Kasturirangan, an Indian astronomer, conducted extensive research on the X-ray emission from nebulae. His work provided insights into the high-energy processes occurring within these objects and the role of X-rays in shaping their structure and dynamics.

S. N. Biswas, an Indian astronomer, made significant contributions to the study of the interaction between nebulae and their surrounding interstellar medium. His research focused on understanding the effects of shock waves, turbulence, and magnetic fields on the evolution of these celestial structures.

D. K. Biswas, an Indian astronomer, conducted extensive numerical simulations of nebulae. His work utilized supercomputers to model the dynamics, structure, and evolution of these celestial objects, providing insights into their physical properties and behavior.

J. C. Bhattacharyya, an Indian astronomer, made significant contributions to the study of the role of magnetic fields in shaping the morphology and dynamics of nebulae. His research focused on understanding the effects of magnetic reconnection and field-driven outflows on the evolution of these celestial structures.

T. P. Prabhu, an Indian astronomer, conducted extensive research on the detection and characterization of protoplanetary disks around young stars. His observations using infrared and millimeter telescopes provided valuable insights into the formation and evolution of planetary systems.

U. R. Rao, an eminent Indian astronomer, made significant contributions to the study of the role of cosmic rays in the ionization and heating of nebulae. His research focused on understanding the effects of particle acceleration and transport on the physical properties and evolution of these celestial structures.