The cycles of changes of the face of the moon as seen from earth: new (dark) to waxing to full to waning and back to new.
The phenomenon whereby the shadow of the Moon falls on the Earth, producing a region of darkness in the daytime.
The phenomenon whereby the shadow of the Earth falls on the moon, producing a relative darkness of the full moon.
Temporary relatively cool, dark regions on the sun's surface.
A small, rocky fragment that orbits the sun.
A very small asteroid
A meteoroid that survives passage through the Earth's atmosphere and hits the ground.
A body composed of ice and dust that orbits the Sun, usually in a very eccentric orbit, and which has one or more luminous tails when it is close to the sun.