Glossary
Search and learn key terms.
- Space
Nebula
A cloud of cosmic dust and gas; a region where stars may form.
- Space
Exoplanet
A planet orbiting a star outside the Solar System.
- Depths
Hydrothermal vent
A seafloor opening that releases hot, mineral-rich water.
- Depths
Bathymetry
The measurement and mapping of water depth.
- Space
Black hole
An object whose gravity is so strong that not even light can escape.
- Depths
Pelagic zone
The open water column of the ocean, away from coast and seafloor.
- Space
Spectroscopy
A method of studying composition by analyzing light spectra.
- Depths
Hadal zone
The deepest ocean trenches — typically below 6000 meters.