AstroSat:

• India’s Astrosat space telescope has witnessed the birth of a black hole in space for the 500th time.
• AstroSat is India’s first multi-wavelength space telescope, which has five telescopes seeing through different wavelengths simultaneously — visible, near UV, far UV, soft X-ray and hard X-ray.
• It has been studying Gamma-Ray Bursts (GRB).

What is a black hole?

• A black hole is a place in space where gravity is so strong that even light cannot escape its pull.
• According to Nasa, the gravity in black holes is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.