The Sun is a unique physical laboratory in which the various domains of physics inaccessible to laboratories on earth can be studied in great detail. Its proximity allows us to understand it in great depths. George Ellery ...

Sun has complex magnetic features like sunspots, magnetic bright points, plages, network fields, filaments, etc. These complex magnetic features are found to be associated with various observed dynamical phenomenons like ...

We are developing compact astronomical payloads for ultraviolet (UV) observations from CubeSats and high altitude balloons. It is important to have a highly sensitive, low noise detector in the UV region where the ...

Our Galaxy, also called the Milky Way, is a spiral galaxy consisting of three major distinct components: bulge, disc and halo. They differ from each other in their structural as well as kinematical and chemical properties. ...

One of the primary causes for the occurrence of observed features on the Sun is its magnetic field. The traditional way of measuring the solar magnetic fields is through the Zeeman effect. Over the decades, as the precision ...

The group of hydrogen-deficient (H-deficient) and carbon rich supergiants spanning a range in their effective temperatures are: hydrogen deficient carbon (HdC) stars, R Coronae Borealis (RCB) stars, and extreme helium ...

The thesis is focused on the study of the coronal transients at different spatial and tem- poral scales seen in different layers of the solar atmosphere using space-based imaging and spectroscopic instruments. The first ...

Cosmic Microwave Background (CMB) is a relic from the early Universe. It was generated due to the physical processes in the early Universe during an epoch known as the recombination or decoupling epoch. The CMB has highly ...

The discovery of several bright supernovae (SNe) in recent years has evoked a great deal of interest in these objects. The study of these objects are of importance not only as probes to the end stages of stellar evolution, ...