tinh vân

Một tinh vân sáng lấp lánh trong kính thiên văn.

Definition

1. Noun:
   • Nebula: A cloud of gas and dust in outer space, visible in the night sky either as a distinct, luminous patch or a dark silhouette against other luminous matter. Nebulae are often the birthplaces of stars or the remnants of dead or dying stars.

Usage Examples

• Noun:
  • Kính viễn vọng không gian Hubble chụp được nhiều hình ảnh tuyệt đẹp về các tinh vân. (The Hubble Space Telescope has captured many beautiful images of nebulae.)
  • Tinh vân Orion là một trong những tinh vân sáng nhất và có thể nhìn thấy bằng mắt thường. (The Orion Nebula is one of the brightest nebulae and can be seen with the naked eye.)
  • Các ngôi sao mới được hình thành bên trong những đám tinh vân. (New stars are formed inside these nebulae.)

Advanced Usage

• Nebulae are classified into several types based on how they emit or reflect light and their composition:
  • Emission Nebula: A nebula that glows because its gas is ionized by the intense ultraviolet radiation from nearby hot stars.
  • Reflection Nebula: A nebula that shines because its dust particles reflect the light from nearby stars.
  • Dark Nebula: A dense cloud of gas and dust that blocks the light from objects behind it, appearing as a silhouette.
  • Planetary Nebula: The glowing shell of ionized gas ejected from red giant stars in the later stages of their life.
  • Supernova Remnant: The expanding cloud of debris from a massive star that has exploded in a supernova.

Variants and Related Words

• Tinh vân hành tinh (n): Planetary nebula.
  • Tinh vân Chiếc Nhẫn là một ví dụ điển hình của tinh vân hành tinh. (The Ring Nebula is a classic example of a planetary nebula.)
• Tinh vân phát xạ (n): Emission nebula.
• Tinh vân phản xạ (n): Reflection nebula.
• Tinh vân tối (n): Dark nebula.

Synonyms

• Nebula: The direct and primary English equivalent.
• Cloud (in an astronomical context): Often used descriptively, as in "a cloud of interstellar gas and dust."

Related Terms

• Thiên hà (n): Galaxy. A much larger system composed of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity. A nebula is a component a galaxy.
• Ngôi sao (n): Star. Stars are often born within nebulae and, at the end of their life cycles, can create new nebulae.