protostar

noun

pro·​to·​star ˈprō-tō-ˌstär How to pronounce protostar (audio)
: a cloud of gas and dust in space believed to develop into a star

Examples of protostar in a Sentence

Recent Examples on the Web
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The telescope has recorded young protostars, early-stage stars still accumulating mass from surrounding clouds, emitting powerful jets of material. Tiffany Acosta, The Arizona Republic, 17 Sep. 2024 The protostar itself sits in the rotating, dusty disk at the center of the image, where infrared radiation cannot escape because of the density of the dust and gas. Lori Youmshajekian, Scientific American, 1 Jan. 2024 The chemicals found around the protostars may mirror the early history of our solar system, allowing astronomers a way to look back at what was present when the sun and the planets that orbit it, including Earth, were forming. Ashley Strickland, CNN, 15 Mar. 2024 Dense clumps within these clouds can collapse to form protostars. Ashley Strickland, CNN, 15 Mar. 2024 See all Example Sentences for protostar 

Word History

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of protostar was in 1947

Dictionary Entries Near protostar

Cite this Entry

“Protostar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/protostar. Accessed 22 Nov. 2024.

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