Prev
Next
Celestial object that is more massive than a giant planet but not massive enough to be considered a star.
One of the brightest stars in the night sky; also called Alpha Orionis.
A region of spacetime where gravity is so strong that nothing can escape from it.
A common galaxy shape.
System where two stars orbit around a common barycenter.
A device made for measuring electromagnetic radiation.
Optical effect observed during a solar eclipse; also called diamond ring effect.
The most commonly accepted theory about the beginning of universe and time.
A large meteor which explodes in the atmosphere.
An additional full moon that appears in a subdivision of a year.