protoplanet
noun
\
Definition of protoplanet
Keep scrolling for more
Other Words from protoplanet
\
adjective
Examples of protoplanet in a Sentence
Recent Examples on the Web
The moon probably formed from another protoplanet smashing into the young Earth, and a runaway planet has long been the suspected culprit behind the odd tilt of Uranus. — John Wenz, Popular Mechanics, "We Might Finally Know What Smacked Uranus Sideways," 2 July 2018 The discoveries, and the new method used to make them, are a thrilling advancement of exoplanet sciences to include protoplanets still in the process of formation, which were previously hidden from view. — Jay Bennett, Popular Mechanics, "Three Newborn Planets Discovered Around an Infant Star," 13 June 2018 Fortunately, the study of protoplanets is just getting started. — Jay Bennett, Popular Mechanics, "Three Newborn Planets Discovered Around an Infant Star," 13 June 2018 Therefore, the meteorite diamonds reveal information about their parent protoplanet. — Doris Elin Salazar, Scientific American, "Diamonds in Meteorite May Come from a Lost Planet," 18 Apr. 2018 The diamonds themselves may have been larger until the protoplanet was destroyed. — John Wenz, Popular Mechanics, "Diamond-Encrusted Meteorite Could Be From a Lost Planet," 17 Apr. 2018 The diamond pieces inside the meteorite hold a compelling record of these protoplanets and their collisions, according to the study. — Doris Elin Salazar, Scientific American, "Diamonds in Meteorite May Come from a Lost Planet," 18 Apr. 2018 The protoplanet in question may have originated in the outer solar system and migrated inward to the inner solar system. — John Wenz, Popular Mechanics, "Diamond-Encrusted Meteorite Could Be From a Lost Planet," 17 Apr. 2018 As Sarah Gibbens at National Geographic reports, in the first 10 million years of our planetary family, swarms of protoplanets composed of rock, dust and gas likely pinballed around the sun. — Jason Daley, Smithsonian, "Diamonds Trapped in Strange Meteorite Came From Solar System’s Earliest Planets," 19 Apr. 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'protoplanet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Keep scrolling for more
Comments on protoplanet
What made you want to look up protoplanet? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Original Meanings Quiz
-
- Which of the following is the earliest known sense of the word awe?
Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
-
Original Meanings Quiz
A quiz for the pedantic and those annoyed by them!
Take the quiz -
A Green Quiz
How many questions can you answer about the word "green"?
Take the quiz -
Name That Thing
Test your visual vocabulary with our 10-question challenge!
Take the quiz -
SCRABBLE® Sprint
SCRABBLE® fans, sharpen your skills!
Play the game
Share protoplanet
Resources for protoplanet