Spaceship Earth

While no one yet knows what's needed to build a habitable planet, it's clear that the interplay between the sun and Earth is crucial for making our planet livable – a balance between a sun that provides energy and a planet that can protect itself

Four new NASA Earth-observing missions are collecting data from space – with a fifth newly in orbit – after the busiest year of NASA Earth science launches in more than a decade.

NASA's Voyager 1 spacecraft showed its love for the solar system, including Earth, with these images on Feb. 14, 1990.

Researchers have discovered an invisible shield some 7,200 miles above Earth that blocks so-called "killer electrons."

Two astrophysicists argue that questions about the future of life on Earth and beyond may soon be resolvable scientifically, by combining the earth-based science of sustainability with the space-oriented field of astrobiology.

Data from an Earth-observing satellite has provided unexpected evidence that ice loss in Antarctica has had a noticeable effect on Earth's gravity.

At least some of Earth’s water is older than the Sun.

The way we define life matters in our search for life on other planets.

Conditions on Earth during its first 500 million years may have been cool enough to form oceans of water instead of being too hot for life to form.

Dr. Phoebe A. Cohen is a Professor of Geosciences at Williams College and is involved in numerous research projects with the NASA Astrobiology Program. Cohen studies the fossil record to uncover clues about the evolution of complex life on Earth. In her work, she studies