File:Eso2003c.jpg · Wikimedia Commons · See Wikimedia Commons
AI overview
A variable star is a star whose brightness changes over time as seen from Earth. These stars matter because their brightness patterns help astronomers measure cosmic distances and understand what's happening inside stars.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
- Subclass of
- star
- Image
- Eso2003c.jpg
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- Commons category
- Variable stars
- topic's main category
- Category:Variable stars
- has characteristic
- change
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
- topic has template
- Template:Variable star topics
- Stack Exchange tag
- astronomy.stackexchange.com/tags/variable-star
- short name
- Var
via Wikidata · CC0
Article · 中文
變星是從地球上觀察其亮度（視星等）有起伏變化的恆星。 這種變化可能是由於發射的光量變化，或某些部分被阻擋而引起的，因此變星可被歸類為： * 內因變星（本質變星）：其亮度是實際上發生變化。例如，因為恆星週期性的膨脹和收縮。 * 外因變星：其亮度變化是由於可以到達地球的光量有所變化。例如，因為是聯星，它的伴星有時會經過它的前方。 許多，也可能是大多數，恆星的亮度或多或少都有一些變化：例如，我們的太陽，它的能量輸出在11年的週期中大約有著0.1%的變化。
Abstract from DBpedia / Wikipedia · CC BY-SA
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