You may have heard people say that aboard the International Space Station (ISS) there's "zero gravity," but in fact, gravity is still very much present. The station orbits Earth at an altitude of ...

This chapter is divided into two sections. The first section is an overview of the materials-science microgravity research program implemented by the National Aeronautics and Space Administration ...

A meteorite chip sat in a small container, bathed in liquid, while the International Space Station floated overhead. Inside, a fungus spread thin threads across the rock. A bacterium built a slick ...

When scientists sent bacteria-infecting viruses to the International Space Station, the microbes did not behave the same way they do on Earth. In microgravity, infections still occurred, but both ...

For deep-space missions to the moon, Mars and beyond, one deceptively simple question drives some of NASA’s most complex engineering challenges: How do you keep enough fuel cold—and stable—long enough ...