“Obey gravity. It’s the law” is a jocular saying that has been printed on many images. The law of gravity is a natural law and wasn’t passed by any legislature.
 
“Everyone has to obey gravity—it’s the law” was posted on the newsgroup alt.fan.dragons on November 7, 1998. “Obey gravity, it’s the law!” was posted on the newsgroup alt.acme.exploding.newsgroup on June 5, 1999.
 
   
Wikipedia: Gravity
Gravity (from Latin gravitas, meaning ‘weight’ ), or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward (or gravitate toward) one another. On Earth, gravity gives weight to physical objects, and the Moon’s gravity causes the ocean tides. The gravitational attraction of the original gaseous matter present in the Universe caused it to begin coalescing, forming stars—and for the stars to group together into galaxies—so gravity is responsible for many of the large-scale structures in the Universe. Gravity has an infinite range, although its effects become increasingly weaker on farther objects.
       
Google Groups: alt.fan.dragons
TIME TRAVEL IS *POSSIBLE*
Devio X
11/7/98
(...)
Hmm . . . My guess is that they’d orbit each other (everyone has to obey gravity—it’s the law).
     
Google Groups: alt.acme.exploding.newsgroup
Vacation!!!
Anna2dd
6/5/99
(...)
Have a great weekend and remember, “Obey gravity, it’s the law!”
 
Google Groups: alt.acme.exploding.newsgroup
hungry penguins
~* panDEEora *~
12/16/99
(...)
“Obey gravity. It’s the law.” - Fig Newton.
     
Google Books
Meteorology for Scientists and Engineers
By Roland B. Stull and C. Donald Ahrens
Pacific Grove, CA: Brooks/Cole
2000
Pg. 21:
Science Graffito
Spray painted on the sidewalk of a large university was: “Obey gravity. It’s the law.”
 
November 2004, InStyle (New York, NY), “NETSHOPPER” by Selene Milano, pp. 337-346:.
“Obey gravity. It’s the law!” ($15).
 
Twitter
Diana Rajchel
@diana_rajchel
Obey gravity. It’s the law.
9:30 PM · Jul 30, 2007·Twitter Web Client
 
Twitter
Paul Nicholson
@pwnicholson
Going to East Nashville night out against crime. Wearing my “obey gravity, it’s the law” shirt. See you there!
7:25 PM · Aug 7, 2007·Twitter Web Client
 
Twitter
Busy Mom
@Busymom
Obey gravity. It’s the law.
10:08 AM · Oct 8, 2007·Twitter Web Client
 
Twitter
cait
@cait
Replying to @tgtips
@tgtips you need some geek t-shirts… like “Obey gravity, it’s the law”
2:52 AM · Jan 12, 2008·Twitter Web Client
   
8 December 2008, The Blade (Toledo, OH), “Clever writers abound in T-shirt trade” by Thomas Walton, pg. A9:
“Obey gravity ... it’s the law.”
 
HotCars
8 License Plates And Bumper Stickers That Are Just…So Embarrassing
BY CORY BARCLAY – ON DEC 27, 2018 IN CAR ENTERTAINMENT
(...)
5
OBEY GRAVITY. IT’S THE LAW!
via Sub5Zero
This one’s pretty harmless and funny, and clearly belongs to a person with an interest in science and physics. It reads, “Obey Gravity, it’s the law!” It’s a bit of a play on words—as in how an off-duty police officer might own this as a tongue-in-cheek way of showing that he’s part of law enforcement. It’s telling you that you should always obey the law. But when gravity is concerned, you don’t really have a choice, do you?
 
Google Books
Title Obey Gravity It’s the Law Composition Notebook: College Ruled 93/4 X 71/2 100 Sheets 200 Pages for Writing
Author Flippin Sweet Books
Publisher Independently Published, 2019
ISBN 1795873175, 9781795873178
Length 102 pages
Subjects Humor › Topic › Business & Professional