Christen Sorensen

Managing Real Estate Broker with Fathom Realty PB00068179

Christen Sorensen was born in Jutland, Denmark back in 1562. His father died when he was eight. An uncle took charge of him educating him at Lemvig. This only lasted three years due to him being sent back to his mother who needed him to help her work the fields.

She agreed to let him study during the winter months however in 1577 he ran away to Viborg to continue his studies. In 1588, you would find him working as an assistant at the astronomical observatory in Uraniborg. He worked there for eight years, continuing his education taking a master’s degree at Rostock. In 1605, he was a professor at the University of Copenhagen. In 1607, he was elected chair of the mathematics department. He held that position until his death in 1647.

Now enough background about Christen Sorensen Longomontanus. It was what he did in those years that will forever place him in the history book of the world. In 1622, he improved on Tycho Brach’s geoheliocentric model of the astronomical tables. His found a mathematical formula about refraction better known as “squaring the circle”. The challenge was constructing a square with the same area as a given circle by using a finite number of steps with a compass and straightedge. His mathematical formula was finding the square roof off 18252 with gives 3.14185 (or 22/7). To date no-one has ever demonstrated they were more accurate than Christen in the formula he came up with several hundreds of years earlier. Recognize his formula???  

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Roy Kelley
Realty Group Referrals - Gaithersburg, MD

Thank you very much, James, for sharing this very interesting story.

May 14, 2017 04:38 AM #1
Sally K. & David L. Hanson
EXP Realty 414-525-0563 - Brookfield, WI
WI Real Estate Agents - Luxury - Divorce

Quite a discovery....long remembered by mathematically inclined folks !

May 14, 2017 04:41 AM #2
Barbara Todaro
RE/MAX Executive Realty - Franklin, MA
Marketing Agent for The Todaro Team

Good morning, James Dray I DO recognize and know that figure and I know the formula very well.... I was a geometry teacher in my other life 47 years ago...but I still remember it...

May 14, 2017 04:47 AM #3
Gabe Sanders
Real Estate of Florida specializing in Martin County Residential Homes, Condos and Land Sales - Stuart, FL
Stuart Florida Real Estate

Good morning James.  Are you saying this gentleman was the pi maker?

May 14, 2017 04:48 AM #4
Raymond E. Camp
Howard Hanna Real Estate Services - Ontario, NY
Licensed Real Estate Salesperson Greater Rochester

Good morning James,

Keep the math ones coming.

Make yourself an astonishing day.

May 14, 2017 05:28 AM #5
Nina Hollander
Coldwell Banker Residential Brokerage - Charlotte, NC
Your Charlotte/Ballantyne/Waxhaw/Fort Mill Realtor

Sorry, James, wish I did know whom and what you were talking about. 

May 14, 2017 05:40 AM #6
Ron and Alexandra Seigel
Napa Consultants - Carpinteria, CA
Luxury Real Estate Branding, Marketing & Strategy


Thanks for making sure our math knowledge stays fresh.  I do remember square roots.  A

May 14, 2017 06:43 AM #7
Sheila Anderson
Referral Group Incorporated - East Brunswick, NJ
The Real Estate Whisperer Who Listens 732-715-1133

Good morning again James. No didn't recognize him or understand what he did however for you to write of him today is amazing.

May 14, 2017 06:53 AM #8
Brian England
Arizona Focus Realty - Gilbert, AZ
MBA, GRI, REALTOR® Real Estate in East Valley AZ

As a mathematician myself, I definitely recognize that as Pi.  I had not heard the story of this man before though!

May 14, 2017 06:57 AM #9
Wayne Martin
Wayne M Martin - Chicago, IL
Real Estate Broker - Retired

Good morning James. Wow, Christen was a creative guy! Enjoy your day!

May 14, 2017 07:00 AM #10
Joe Pryor
The Virtual Real Estate Team - Oklahoma City, OK
REALTOR® - Oklahoma Investment Properties

I had studies about Brach in college but don't recollect anything about this gentleman.

May 14, 2017 08:41 AM #11
Kathy Streib
Room Service Home Staging - Delray Beach, FL
Home Stager - Palm Beach County,FL -561-914-6224

James once again...a person whose mathematical background is far superior to mine but I do remember the formula.

May 14, 2017 09:23 AM #12
Paul S. Henderson, REALTOR®, CRS
Tacoma, WA
South Puget Sound Washington Agent/Broker!

Again you've taught me for what I do not know James Dray. Thank you! 

May 14, 2017 08:46 PM #13
Jeff Dowler, CRS
eXp Realty of California - Carlsbad, CA
The Southern California Relocation Dude

Interesting story, James, especially for those who are mathematically inclined,

Have a terrific week!


May 15, 2017 05:10 AM #14
faye schubert
Branson, MO
Living the Branson Lake Life

I don't remember much with math but I know that one!

May 15, 2017 05:23 AM #15
Endre Barath, Jr.
Berkshire Hathaway HomeServices - Beverly Hills, CA
Realtor - Los Angeles Home Sales 310.486.1002

Ha James you made me laugh, of all the math courses I took Geometry was my strength but clearly not memory:)) long behind long forgotten, Endre

May 15, 2017 10:06 PM #16

This is one of the best Blog. Keep up great work.I like your post and everything you share with is extremely informative.
novels urdu keep sharing informative posting here.

Dec 06, 2019 12:48 AM #18
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