quasars - Master This Word
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quasars Word Meanings
- A distant celestial object emitting massive energy.
- An extremely luminous active galactic nucleus.
- A star-like object that is highly redshifted.
quasars Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
quasars Phonetic & Pronunciation
UK
/ˈkweɪ.zɑː/
US
/ˈkweɪ.zɑr/
quasars Word Etymology
(a) 'quas' + 'ar' (a suffix for relating to), (b) Originating from the term 'quasi-stellar radio source' in 1960s science, (c) Imagine a brilliant star-like object that beams energy across the universe, like a cosmic lighthouse guiding us through the vastness of space.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputReal Context
Quasar is a term used in astronomy for a distant, extremely luminous object powered by gas falling into a supermassive black hole at the center of a galaxy. The light we see from a quasar comes from material heated to extreme temperatures as it spirals inward, emitting across the electromagnetic spectrum and often outshining the entire host galaxy. Quasars were first identified in radio surveys because they appeared star-like, which gave rise to the name quasi-stellar radio source; the nickname stuck even after higher-resolution images revealed their true nature. In science writing and teaching, quasar can be discussed as a beacon from the early universe, illustrating how accretion and relativistic processes produce immense energy across vast cosmic distances.
Usage Reminders
- Quasar is a technical astronomy term, not a common star.
- Describe a quasar as a distant, energetic object powered by black holes.
- Quasars are typically observed far away, often billions of light-years from Earth.
- Do not confuse quasar with pulsar or ordinary stars.
- In writing, emphasize the physical process (accretion, relativistic jets) rather than metaphorical brightness.
Common Misconceptions
- Quasar is a star.
- Quasars are common objects nearby the Earth.
- Quasars emit only in visible light.
- Quasar and pulsar are the same thing.
- Quasars are galaxies, not separate objects.
Thinking Differences
Explain to an English speaker that quasar is a technical noun for a distant, energetic object, not a 'star' or a common object; emphasize the physics rather than sensational brightness.
Learning Tips
- Practice the pronunciation: /ˈkweɪ. zɑːr/.
- Relate quasar to accretion onto a black hole.
- Differentiate quasar from pulsars and normal stars.
- Use in a sentence about distant galaxies.
- Visualize it as a cosmic beacon from the early universe.
- Review several example contexts (science articles, textbooks).
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