Sunrise
Sunrise is defined as the moment the upper edge of the solar disk—called the upper limb—becomes visible above the horizon.
Sunrise is defined as the moment the upper edge of the solar disk—called the upper limb—becomes visible above the horizon.
As the upper edge of the solar disk—called the upper limb—disappears below the horizon, the Sun has set.
A temporary dark blemish on the surface of the Sun that is a planet-size region of gas cooler than its ...
The stage in a star's evolution where the core contracts and the star swells to about five hundreds times its ...
A conjunction that occurs when a planet passes behind the Sun and is on the opposite side of the Sun ...
A planet that exists outside the orbit of the Earth. All of the planets in our solar system are superior ...
How we describe objects that have a million times (or more!) than our sun.
A term used to describe a full moon that occurs during the Moon's closest approach to the Earth. During a ...
A star ending its life in a huge explosion. In comparison, a nova is a star that explosively sheds its ...
An expanding shell of gas ejected at high speeds by a supernova explosion. Supernova remnants are often visible as diffuse ...