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Please note!
This fact brief was originally published as an experiment to test the concepts behind fact briefs.
Readers should be aware that while there is still a lot of useful information in fact briefs like this one, not all of them reflect Gigafact's current methods and standards for fact briefs. If you come across any that you feel are out of date, don't hesitate to contact us at support@gigafact.org.
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FACT BRIEF

Does current data suggest there are more trees in Canada’s boreal forest than stars in the Milky Way?

By Jacob Alabab-Moser
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YES

Current data suggests there are more trees in Canada's boreal forest than stars in the Milky Way galaxy.

In 2015, Nature published a study estimating the global tree population at more than three trillion trees. According to data collected by the study's 38 researchers, about 750 billion trees are located in boreal forests in North America and Eurasia. Canada's reported share is 318 billion trees. The estimate was formed using data from international forestry databases and peer-reviewed studies reporting large international inventories published in the preceding 10 years. The study only included trees thicker than 10 centimeters in diameter at breast height. 

In contrast, the most cited estimate of stars in the Milky Way, conducted by the The European Space Agency by measuring the luminosity of the galaxy, is 100 billion.

NASA noted that while 100 billion is the most commonly cited figure, estimates of 400 billion and greater exist.

This fact brief is responsive to conversations such as this one.
Sources
Nature Mapping tree density at a global scale
Our World in Data Number of trees
European Space Agency How many stars are there in the Universe?
The Conversation How many stars are there in space?
NASA Blueshift How Many Stars in the Milky Way?
ABOUT THE CONTRIBUTOR
Gigafact
Between 2020 and 2022, under close editorial supervision, Gigafact contracted a group of freelance writers and editors to test the concepts for fact briefs and provide inputs to our software development process. We call this effort Gigafact Foundry. Over the course of these two years, Gigafact Foundry writers published over 1500 fact briefs in response to claims they found online. Their important work forms the basis of Gigafact formats and editorial guidelines, and is available to the public on Gigafact.org. Readers should be aware that while there is still a lot of relevant information to be found, not all fact briefs produced by Gigafact Foundry reflect Gigafact's current methods and standards for fact briefs. If you come across any that you feel are out of date and need to be looked at with fresh eyes, don't hesitate to contact us at support@gigafact.org.
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About fact briefs published on Gigafact
Fact briefs are short, credibly sourced summaries that offer “yes/no” answers in response to claims found online. They rely on publicly available, often primary source data and documents. Fact briefs are created by contributors to Gigafact —a nonprofit project looking to expand participation in fact-checking and protect the democratic process. See all fact briefs here.