The week of May 17, 2015

The Final Frontier

Meet the heroes keeping us safe from space junk

By Aaron Sankin

It’s time to clear out the clutter.

Features

The problems with talking to aliens

By Marissa Fessenden

Is there anybody out there? It may be dangerous to find out.

How we learned to love anthropomorphic space probes

By Gavia Baker-Whitelaw

Our most daring explorers are inanimate, but they feel profoundly human.

Behind the indie video game sensation that caught NASA’s attention

By Cynthia McKelvey

Kerbal Space Program’s spirit of open-ended experimentation has the gravitational pull of 1,000 suns.

A brief history of DIY spaceflight

By Becky Ferreira

From the legend of Wan Hu to the Brooklyn Space Program.

25 iconic images from the Hubble Space Telescope

By Lisa Granshaw and Jason Reed

It’s time to celebrate the Hubble’s 25th anniversary.

How astronauts turn their pee into coffee

By Mike Wehner

It’s good to the last drop.

This visual map shows every manned spacecraft drawn to scale

By Dennis Scimeca

Fifty years of human space travel in one image.