requirements articles

What are the requirements to live on Mars?

The initial hurdle for settling Mars is confronting a world intrinsically hostile to human biology. We cannot simply ste...

When can you be called an astronaut?

The title of "astronaut" carries immense weight, conjuring images of groundbreaking achievement, scientific dedication, ...

Do satellites require propulsion?

The necessity of propulsion for an orbiting object is not always intuitive; after all, once a satellite is launched, it ...

How many geostationary satellites are required for global coverage?

The simple question of how many geostationary satellites are needed to blanket the Earth reveals a fascinating interplay...