Sold out

Schwarzschild Radius Pin

PRODUCT TYPE: Pin

The diameter of this pin is the same as a black hole with the mass of Earth.

If you compress any amount of mass, it becomes denser. If you compress it enough, it will become so dense that light can no longer escape it—this size is the object’s Schwarzschild radius. An object that is compressed smaller than this radius is a black hole.

If you compressed all of the mass of Earth into the diameter of this pin, it would be so incredibly dense that you would not even be able to see it.

Every object has a Schwarzschild radius proportional to its density: the Sun's is 3km, Jupiter’s is 2.62m, and a hamburger’s is smaller than a single atom. Karl Schwarzschild derived this property in 1915 using Einstein’s recent field equations.

$10.00

Pickup available at our Tulsa Storefront

Usually ready in 24 hours

Schwarzschild Radius Pin

Default Title

CUSTOMER REVIEWS
CUSTOMER REVIEWS

Customer Reviews

Based on 14 reviews
86%
(12)
14%
(2)
0%
(0)
0%
(0)
0%
(0)
M
M.L. (Virginia, United States)

Morse gave this item 5 stars

A
A.M.M. (Virginia, United States)

Angela rated this item 5 stars

M
M.C. (Virginia, United States)

I bought this for my son‘s birthday, and he loved it!

D
D.

Dolpe rated this 5 stars on Etsy

G
G.

This pin is genius and definitely a great conversation starter! Pin comes with a metal backing and shipping is incredibly fast!

J
J.

The pins are just what I expected!!! They will be fun on shirts.

R
R.

Robin rated this 5 stars on Etsy

A
A.

I love this pin so much! Its high quality and well made. Thank you!

E
E.B.

Fun and educational!

A
A.P. (Florida, United States)
Meditative

I pinned this to the wall next to my computer desk and I can stare at it contemplatively, it’s incredible to visualize and the pin makes a neat way to remind me of how small I am in the universe

Authenticity Guaranteed

Everything we sell is verified authentic. We only deal with the most reputable collectors, and consult with our trusted network of scientists and experts.

Free Shipping

All orders of $50 or more qualify for free shipping in the US.

Easy Payments

We accept most cards, PayPal, After Pay, Apple/Google/Meta Pay, and crypto.

Simple Returns

Change your mind? No problem. Enjoy easy returns within 30 days.

Free Stickers

We toss a random science sticker in every online order

We use cookies to help people find our small business and have an enjoyable shopping experience.

Schwarzschild Radius Pin

Schwarzschild Radius Pin

$10.00