Kind of supernovae

FOUND ONLINE: In 2011 a team of astronomers used just this kind of supernovae to measure luminosity independently of distance -- and in the process, discover the existence of dark energy.

I wonder why they used supernovae, the plural form of supernova. I see no reason to do so. I think supernova would have worked fine here.

EMAIL: tgilli52@gmail.com TWITTER: EDITORatWORK

More EDITOR@WORK blog entries
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• Reminders for would-be novelists

• What I do when I'm editing

• What I charge (it's a deal) and what I edit

• Slogging through the Internet

• J-school: More eyes on your stories

• J-school: Go out and learn

• Rookie mistakes for magazine writers

Entries from The Dog Blog

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• 13-plus years with my dog Lady

• ... said the spider to ...

• The Dog Diary (2014)

• YIP! YIP! The stereo-sound huskies

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Blog entries from The Auto Racing Journal

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(a book of great stories about the Intimidator)

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(the book of great NASCAR stories)

• My best day as a sports writer

• Jeff Gordon's milk toast to Dale Earnhardt

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More blog entries by Tom Gillispie

• Resume for a writer and editor

• An editor's views on powerful writing

• Advice for be and would-be novelists

• Links to TG's stories online

• Favorite quotes

• What I do when I'm editing

Anecdotes by Tom Gillispie

• Good Samaritan

• The PRESS cap and my friend Mike

• Watching TV

• No luck with Billy Sims

• Wipeout at Death Valley

• Days with rainbows

• A desperate writer working in the dark

• Yer outta there!