The spinning neutron is known as:

Options

A. Pulsar
B. Protostar
C. Black hole
D. White dwarf

Explanation

To answer the question "The spinning neutron is known as:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**: Begin by understanding the terms provided in the options: pulsar, protostar, black hole, and white dwarf.

2. **Identify the Key Concept**: The question specifically mentions a "spinning neutron." This indicates that we are looking for a term related to neutron stars.

3. **Define Each Option**:
- **Pulsar**: A type of neutron star that emits beams of radiation and spins rapidly.
- **Protostar**: An early stage in the formation of a star, not related to spinning neutrons.
- **Black Hole**: A region of space with a gravitational pull so strong that nothing can escape from it, not specifically related to spinning neutrons.
- **White Dwarf**: A small, dense star that is the remnant of a star that has exhausted its nuclear fuel, not specifically a spinning neutron.

4. **Analyze the Information**: From the definitions, we can see that a pulsar is indeed a spinning neutron star. The video transcript confirms that most neutron stars observed are pulsars and that they emit radiation at regular intervals.

5. **Conclude**: Based on the definitions and the information provided, the correct answer to the question is **Pulsar**.

### Final Answer:
The spinning neutron is known as a **Pulsar**.

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