What is AstroSat?

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About AstroSat:

It is India’s first dedicated multi-wavelength space observatory aimed at studying celestial sources in X-ray, optical, and UV spectral bands simultaneously.
It was launched by the Indian launch vehicle PSLV from Satish Dhawan Space Centre, Sriharikota, on September 28, 2015.
The spacecraft control center at Mission Operations Complex (MOX) of ISRO Telemetry, Tracking and Command Network (ISTRAC), Bengaluru, manages the satellite during its entire mission life.
The minimum useful life of the AstroSat mission is around 5 years.
It carries a total of five scientific payloads enabling imaging and studying the temporal and spectral properties of galactic and extra- galactic cosmic sources in a wide range of wavelengths on a common platform.
Objectives:
- To understand high energy processes in binary star systems containing neutron stars and black holes.
- Estimate magnetic fields of neutron stars.
- Study star birth regions and high energy processes in star systems lying beyond our galaxy.
- Detect new briefly bright X-ray sources in the sky.
- Perform a limited deep-field survey of the Universe in the Ultraviolet region.

Q1: What are Black holes?

Black holes are formed after the supernova explosion when the core of a massive dying star more than 2.5 times the mass of the Sun collapses until an infinite density where gravity is so high that even light cannot escape.

Source: ISRO’s AstroSat, NASA’s space observatories capture dramatic eruptions from stellar wreckage