Capitalization in Science: Playing with Majuscules
Posted by: Peter Rillero in Elementary School Science, High School Science, Middle School Science, science education, tags: capitalization, grammar, NASA, rules, Style Guide, technical writing
Last month, I put in some thoughts about capitalization of Earth and Moon at the end of my blog posting (Long-Lost Lunar Pics and the Lunar Slamdown: Some Recent Space Science News). I did not anticipate reader reaction to this, with over 365 comments and dozens of emails–on both sides of the issue. A few readers told me how tears welled up in their eyes, when they read the line, ““If a meteor hits me, don’t I crater? If my plates move, don’t I crack?” Time magazine did a cover story, “Rethinking the miniscule earth!” Many universities are holding meetings to consider updating their editorial style guide. Of course there was the mail from those who disagreed and like many attacks, they took on distressingly ad hominem nature. No doubt some of these were fueled by Fox TV News, who advocated the status quo: “Why change? Rillero is pandering to the liberal media. We think he should be labeled a Lunatic with a capital ‘L.”
But back to reality… I will be the first to admit that grammar isn’t as exciting as science, but nevertheless, I will share some random ideas about capitalization that science teachers and students should know. Start brewing the coffee; it is difficult to get through all this without some caffeine.
General Guidelines
First, let’s start with rule A from the University of South Carolina’s Publication’s Editorial Style Guide: When in doubt, do not capitalize.
Then a good hedge statement always comes in handy, like this one from the University of Chicago:
“But “rules” in writing — unlike, say, rules in Newtonian physics — are not written in stone. They are established by agreement among experienced writers, even though experienced writers can and do disagree all the time.”
I find this an interesting analogy. I wonder if people of science look at grammar as black and white but consider science to be changing and based upon shared understanding. While people of grammar view science as black and white, but consider grammar to be changing and based upon shared understanding. I like using analogies to explain science, but I find it interesting when people use science to explain other things. (But I will save this for a future blog posting.)
From NASA: Celestial Objects
While not everyone would agree with my call to use capital letters when referring to the Earth, Moon, and Sun as celestial objects, NASA certainly does.
According to the NASA style guide: Names of celestial bodies such as “the North Star, Halley’s Comet, Venus, Earth (the planet), the Sun, the Moon (Earth’s) are capitalized.” So let the controversy end! But we don’t capitalize, again according to NASA, “earth (the ground) and moons of Jupiter.” I went into this a bit more in my earlier blog post.
For lack of a better organization, let’s fly with NASA for a bit. We also capitalize geologic names such as geologic periods (Upper Cambrian Period, Bronze Age) and soil groups (Laterite, Tundra).
These capitalization comments are from NASA’s Grammar, punctuation, and capitalization: A handbook for technical writers and editors written by Mary K. Mccaskill. The entire handbook is online as a PDF document. This guide has way more to it than capitals, so if you want a good free guide to technical writing, have at it. I think it is a good idea to introduce students to different types of style guides.
From NASA: Geologic Entities and Life
Here are a few more capitalization nuggets from NASA:
- While we do capitalize days of the week (Monday) and months (October), we don’t capitalize seasons (fall, spring).
- For biological names, we don’t capitalize common names (red buckeye) unless they contain a proper noun (Ohio buckeye).
- We do capitalize kingdom, phylum, class, order, family, and genus but we don’t capitalize species.

So for instance:
Kingdom: Plantae; Division: Magnoliophyta; Class: Magnoliopsida; Order: Sapindales; Family: Sapindaceae; Genus: Aesculus; and Species: glabra
But of course in binomial nomenclature we describe the species with both the genus and species, so for the Ohio buckeye tree, we have Aesculus glabra (see image to the right).
University of South Carolina: More Science Tidbits
Capitalize the formal name of departments but not the informal names. Correct: He enrolled in the Department of Civil Engineering. Also correct: He enrolled in the civil engineering department.
Capitalize entire geographic names and regions of the country but not compass directions or localities. For example: Saluda River Sesquicentennial State Park; Midwest; western East Coast; and northern Atlantic.
Other Random Tidbits from University of Oregon:
Don’t capitalize names of university majors and minors except for proper nouns. For example, “He has a major in Swahili and a minor in biology.”
The names of university courses are capitalized, so for instance, I often teach Methods of Elementary Science 411.
Company trademarks are capitalized. Both of my sons ate Earth’s Best baby food. (This was the first major organic baby food brand and it was started by my brother-in-law Arnie Koss).
“Addresses on Envelopes The United States Postal Service requires that addresses appear on envelopes in all-capital letters and, except for the hyphenated ZIP code, without punctuation.”
I wonder if the US Postal Service has some sort of amnesty program because I better turn myself in for violating this one. But if you agree with capitalizing Earth and Moon, please write to me at this address on the left and if you disagree with my comments and want to do an ad hominem attack, please write me at the address on the right.

Majuscule
In my internet research on capitalization of science terms, I came across a new term: majuscule. It sounds like a school Harry Potter should attend to work on his magic. But this word refers to, as far as I can tell, capital letters. Odd that most people haven’t heard of majuscule, yet miniscule is well known.
Conclusion
If you read all the way to this point, you really have a strong regard for capital appreciation. Capitalization is a tricky affair, but as long as you have your own style guide—there won’t be any capital punishment. Although, we shouldn’t consider the importance of a proper majuscule as miniscule.
For the Record
The first paragraph about the capital controversy was in jest. The address in capitals quote was real but I don’t know if it is true. Arnie Koss is my brother-in-law. The buckeye drawings are from Minnesota Trees and Shrubs (Clements, Rosendahl, and Butters, 1912), which was scanned by Google.




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