Planetary systems probably form from the gravitational collapse of a molecular cloud, also known as a nebula. As the nebula condenses the gases clump together in the center to form a star. The remaining debris orbits the newly formed star and clumps together (by the force of gravity) to form planets and other objects such as asteroids and comets.
When the core of a star blows its surface into space to form a planetary nebula, it sheds its outer layers of gas, exposing the hot, dense core of the star called a white dwarf. The white dwarf emits ultraviolet radiation that ionizes the ejected gas, causing it to glow and form the planetary nebula.
The Cats's Eye Nebula is a perfect example of a planetary nebula. See related link for a pictorial.
A planetary nebula is created when a low- to medium-mass star reaches the end of its life cycle and sheds its outer layers of gas into space. This process exposes the hot core of the star, which emits ultraviolet radiation that causes the surrounding gas to glow and form a colorful nebula.
They explode as a supernova/hypernova to form a planetary nebula/black hole.
Pink
a planetary nebula forms after a hsb o3iii
Planetary nebula is a misnomer because it's totally irrelevant to planets and it has something to do with stars. The short form is "nebula".
Planetary nebula is a misnomer because it's a nebula but it has nothing to do with planets, it's about stars.
When the core of a star blows its surface into space to form a planetary nebula, it sheds its outer layers of gas, exposing the hot, dense core of the star called a white dwarf. The white dwarf emits ultraviolet radiation that ionizes the ejected gas, causing it to glow and form the planetary nebula.
The correct term is planetary nebula. Such nebulae form when a low to medium mass star dies.
The Cats's Eye Nebula is a perfect example of a planetary nebula. See related link for a pictorial.
A star like our sun will shed a planetary nebula after its 'death'
a nebula is classified by a planetary nebulae
After a planetary nebula the oxygen in the middle will make it turn into a blackhole or neutron star.
A planetary nebula consists of gas ejected from old red giant stars.
The Stingray Nebula (Hen 3-1357) is a planetary nebula. (The youngest known).
The eye of god is a Helix nebula. Close to a Planetary nebula.