Watch how a unique dual-satellite mission called GRACE-NASA's Gravity and
Climate Experiment-is revealing an unprecedented view of our water planet.
For background information, educational resources and more, visit Grace:
Tracking Water from Space on the Science Bulletins website,
Science Bulletins is a production of the National Center for Science
Literacy, Education, and Technology (NCSLET), part of the Department of
Education at the American Museum of Natural History. This visualization
was supported by the National Oceanic and Atmospheric Administration
The history of cosmic ray research is a story of scientific adventure. For nearly a century, cosmic ray researchers have climbed mountains, soared in hot air balloons, and traveled to the far corners of the Earth in the quest to understand these energetic particles from space. They have solved some scientific mysteries—and revealed many more. With each passing decade, scientists have discovered higher-energy and increasingly more rare cosmic rays. The Pierre Auger Project is the largest scientific enterprise ever conducted to search for the unknown sources of the highest-energy cosmic rays ever observed.
On cloudless, moonless nights, the stars are so bright over the remote village of Sutherland, South Africa, that a person can walk by starlight alone. Learn more about the village’s Southern African Large Telescope (SALT).
Scientists have been studying brown dwarfs, or failed stars, for nearly a century. What have they learned? And what answers are they still seeking about these objects stuck somewhere between stars and planets?
Two teams working independently in 1998 came to the same conclusion: An invisible force, one that seems to act opposite gravity, is separating the matter in space at an increasing pace. Find out more about their “jaw-dropping” discovery.
If LIGO regularly registers gravitational waves, it will more than vindicate Einstein. The observatory may help answer pressing questions about the cosmos’s biggest mysteries, among them black holes, dark matter, and the Big Bang.
Anything with an accelerating mass has a gravitational effect — an atomic bomb, a spinning aircraft carrier, even you. Learn more about these ripples in space and how LIGO is designed to capture the biggest gravitational waves.
LIGO, or the Laser Interferometer Gravitational-wave Observatory, is just one of five large-scale gravitational-wave detectors in the world. Find out how they rely on each other to achieve their goals.
Our eyes can only detect a fraction of light in the electromagnetic spectrum — otherwise we’d see gamma-ray bursts, flashes that outshine the sun by a million trillion times, about once a day. Learn more.
In early 2004, two unlikely explorers traveled to the red planet and found strong evidence to confirm water once existed on the surface of Mars, and in sufficient quantity to possibly have harbored life.