- 1脈衝星
A pulsar is a tiny, extremely dense leftover star far away in space that spins and sends out regular beats of radio — like a lighthouse, but with radio, not light you can see with your eyes. Each sweep can be timed so sharply that use pulsars as clocks. The name was made in 1968 by the British Antony Hewish and Jocelyn Bell, after the pattern of . You will meet it in science class and space news, not in daily chat. Though actually it is not “like a star” in the everyday yellow-sun way: a pulsar is the leftover core of a huge dead star, spinning hard after the star exploded.
組成A blend of pulsating + (radio) star, built to sound like quasar. On the surface it also looks like pulse + -ar. Coined in 1968, and first used in print in The Daily Telegraph.
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
pulsarnoun
- 1
astronomynatural-sciencesA rotating neutron star that emits radio pulses periodically.
- Rapidly rotating dead stars, pulsars are so named because as they spin, they release beams of electromagnetic radiation across space that appear to pulse like celestial lighthouses. But a pulsar called PSR J1023+0038, located about 4,500 light-years away from Earth in the Sextans constellation, is even more unusual in that some of the pulses are brighter than others, almost like it’s switching between different modes.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。