Astronomy Science Olympiad 2025 – 400 Free Practice Questions to Pass the Exam

LHa115-N19, also known as N19, is classified as a supernova remnant. This designation indicates that it is the remnants of a massive star that has undergone a supernova explosion. During such an event, the outer layers of the star are expelled into space, leaving behind a shell of ionized gas, dust, and other materials. These materials can often be observed in various wavelengths of light, revealing the processes happening within and around the remnant.

Supernova remnants like N19 provide valuable insights into the lifecycle of stars, the chemical enrichment of the interstellar medium, and the dynamics of cosmic explosions. The material ejected from the supernova contributes to the formation of new stars and planets, illustrating their importance in the ongoing cycle of cosmic evolution.

Other types of astronomical objects mentioned, such as nebulae, stars, or black holes, do not accurately represent the nature of N19. Nebulae can be associated with regions of star formation or remnants of dying stars but lack the specific characteristics linking them to a supernova event. Stars are still in their nuclear fusion phase and would not be classified as remnants. Black holes are formed from the core remnants of very massive stars after supernova explosions and are distinct from the