siriometer
siriometer noun: a unit of distance equal to one million astronomical units or 15.813 light-years.
Noun
siriometer (plural siriometers)
- A unit of distance equal to one million astronomical units or 15.813 light-years.
- The siriometer dates its pedigree from the founder of stellar astronomy, William Herschel. As is well known, the distance unit used by Herschel is the mean distance of the first magnitude stars, which distance was called by him the distance of Sirius.1925, The Observatory, volume 48, page 143
- He had used the star Sirius as his standard, so he decided to call the distance to Sirius, whatever it might turn out to be in miles or kilmetres, one 'siriometer'. Herschel calculated that the grindstone measured 1,000 siriometers across and was 100 siriometers thick.2013, Kitty Ferguson, Measuring the Universe: The Historical Quest to Quantify Space, Random House, →OCLC
siriometer meaning in Tamil
siriometer in Tamil
- பழைய வானியல் நீளஅலகு
Forms of siriometer
| plural | siriometers |
|---|
Origin of siriometer
From Sirius + -o- + meter. It is roughly twice the distance from Earth to the star Sirius.
Questions about siriometer
- What does siriometer mean?
- Siriometer means a unit of distance equal to one million astronomical units or 15.813 light-years.
- What is siriometer in Tamil?
- Siriometer in Tamil is பழைய வானியல் நீளஅலகு. See Siriometer meaning in Tamil.
- What part of speech is siriometer?
- Siriometer is a noun.
- What is the plural of siriometer?
- The plural of siriometer is siriometers.
Words near siriometer in the dictionary
Source and license
Adapted from Wiktionary: siriometer (page history and authors); siriometer (Tamil Wiktionary) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
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Cite this entry: “siriometer.” Word.ws, https://word.ws/siriometer. Based on Wiktionary, CC BY-SA 4.0.