Home
Space, Sun and Moon
Penumbra
Penumbra definition: A region of lighter shadow around the darkest part of a shadow.
Related Terms
Astronomy
Axis
Crater
Electromagnetic Spectrum
Equinox
Gravity
Lunar Eclipse
Maria
Moon Phase
Observatory
Orbit
Radio Telescope
Reflecting Telescope
Refracting Telescope
Revolution
Rocket
Rotation
Satellite
Solar Eclipse
Space Probe
Space Shuttle
Space Station
Telescope
Thrust
Umbra
Learn While Gaming
