How can a planetary nebula be identified? Select the two correct answers.(1 point)
central star remnant
central star remnant
dark area
dark area
diffuse edges
diffuse edges
spherical shape
central star remnant and spherical shape
The two correct answers for identifying a planetary nebula are:
1. Central star remnant: Planetary nebulae are formed when a dying star sheds its outer layers, leaving behind a hot, dense central star remnant at the core.
2. Spherical shape: Planetary nebulae often have a characteristic round or spherical shape, which is a result of the spherical shell of gas and dust expanding outward from the dying star.
To identify a planetary nebula, you should look for two correct characteristics.
1. Central star remnant: A planetary nebula is formed when a low mass star runs out of fuel and sheds its outer layers, leaving behind a hot and compact remnant called the central star. This central star remnant is often visible at the center of the nebula and can help identify it.
2. Diffuse edges: Planetary nebulae have a characteristic appearance of glowing gas, which creates a bright and hazy appearance. The nebula usually has a distinct and diffuse edge, often appearing as a spherical or oval-shaped cloud of gas and dust.
Therefore, the correct answers to identify a planetary nebula are:
- Central star remnant
- Diffuse edges