What is the nature of the object found in M1?

The object found in M1, also known as the Crab Nebula, is indeed a pulsar wind nebula. This classification comes from its composition and formation history following a supernova explosion, which created the nebula around 1054 AD. At the core of the Crab Nebula lies a rapidly rotating neutron star known as a pulsar, which emits beams of radiation as it spins. These beams are detectable as pulses of energy, hence the term "pulsar."

The surrounding nebula consists of ejected material from the supernova that continues to expand and is energized by the pulsar's intense magnetic fields and stellar winds. This interaction leads to the emission of radiation across the electromagnetic spectrum, a characteristic feature of pulsar wind nebulae.

This classification distinguishes M1 from other celestial objects like red variable stars, which are typically luminous stars that change brightness, binary systems that consist of two stars orbiting each other, and black holes, which are regions of spacetime exhibiting gravitational forces so strong that nothing can escape from them. The scientific understanding and observations surrounding M1 clearly indicate that it is a pulsar wind nebula, showcasing the complex interplay between stellar remnants and their surroundings after supernova events.