NASA's Fermi Links Cosmic Neutrino to Monster Black Hole

The Ray Space Telescope identified a high-energy neutrino source from a blazar, a type of galaxy with a supermassive black hole. This neutrino, after traveling 3.7 billion years, was detected in Antarctic ice, producing a Muon tracked by the Ice Cube Neutrino Observatory. NASA's Fermi Gamma Ray Space Telescope confirmed the blazar as the source, marking the first time a neutrino was traced to a black hole. This discovery is a significant step in Multi-Messenger Astronomy, which combines light, gravitational waves, and neutrinos to study cosmic phenomena.

How did NASA's Fermi Gamma Ray Space Telescope contribute to the understanding of the blazar?

Explain the concept of Multi Messenger Astronomy as mentioned in the text.