What is the term for the hazy cloud of dust surrounding the nucleus of a comet?

What is the term for the hazy cloud of dust surrounding the nucleus of a comet?

• A. Tail
• B. Head
• C. Coma
• D. Nucleus

Answer: (C)

The term for the hazy cloud of dust surrounding the nucleus of a comet is the "coma." This is a significant feature of comets, as the coma forms when a comet approaches the sun. The heat from the sun causes the comet's ices to vaporize, releasing gas and dust particles, which creates this glowing envelope around the solid core or nucleus. Understanding the coma is essential because it is a defining characteristic of a comet and plays a crucial role in how we observe and study these fascinating celestial bodies.

While the tail is the part that extends away from the sun, and the nucleus is the solid central part of the comet, the coma is specifically the thick atmosphere that forms due to sublimation and is what gives comets their striking appearance when they come close to the sun.