So here it is. These are the primes of ℤ[√-1], ℤ[√-2], ℤ[(1+√-3)/2], ℤ[√-5], ℤ[√-6], and ℤ[(1+√-7)/2], all in one picture (at the top) and individually (in that order, below.)

The reason these rings are interesting is that each of them consists of solutions to quadratic equations x²+bx+c=0 where b and c are integers and b²-4c is some square times -1, -2, -3, -5, -6, or -7, respectively.

(thx ebering for the idea)

(via visualizingmath)


Last week, my friend, astrophotographer Raivo Hein, skyped me and gave me the chance to see the process of capturing an image with his new telescope and software. I saw a tiny part of this because the final photograph takes many days to complete but I still learned a lot about his techniques. So you can see the outcome above — the Triangulum galaxy (M33) which is the third largest member in the Local Group of galaxies after Andromeda and our own Milky Way. (more from Raivo here)

(via spaceexp)


Mount Rainier Is Beautiful, And It Looks Even Better Under The Stars

Not far beyond Seattle, Washington, Mount Rainier rises out of the sky to greet visitors and locals alike. It’s a majestic sight — one that’s certainly beautiful during the day, but we think Mt. Rainier looks even prettier at night.

(Source: Huffington Post, 9/11/2014)

(via spaceexp)


Penguin Drop Caps Series by Jessica Hische and Paul Buckley.

Jessica Hische and Paul Buckley have collaborated on an exciting new project, a series of cover designs for classic literature featuring Jessica’s Drop Caps. The first six titles, below, look pretty amazing.

Check you favorite one here:

(via goodtypography)