What is the life cycle of a nebula?
Over time, the hydrogen gas in the nebula is pulled together by gravity and it begins to spin. As the gas spins faster, it heats up and becomes as a protostar. Eventually the temperature reaches 15,000,000 degrees and nuclear fusion occurs in the cloud’s core.
What is the nebula stage of a star?
A nebula is a large cloud of gas and dust. Gravity can pull some of the gas and dust in a nebula together. The contracting cloud is then called a protostar. A protostar is the earliest stage of a star’s life.
How do stars form ks3?
Formation of a star Stars are formed from massive clouds of dust and gas in space. Gravity pulls the dust and gas together to form a protostar. As the gases come together, they get hot. A star forms when it is hot enough for nuclear reactions to start.
What are the five steps in the life cycle of a star?
What are the 5 stages of a star?
- A nebula. A star forms from massive clouds of dust and gas in space, also known as a nebula.
- Protostar. As the mass falls together it gets hot.
- Main sequence star.
- Red giant star.
- White dwarf.
- Supernova.
- Neutron star or black hole.
What’s it called when a star dies?
Some types of stars expire with titanic explosions, called supernovae. When a star like the Sun dies, it casts its outer layers into space, leaving its hot, dense core to cool over the eons. But some other types of stars expire with titanic explosions, called supernovae.
How is the size of a StAR related to its life cycle?
The larger its mass, the shorter its life cycle. A star’s mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born.
What happens to the gas in a protostar nebula?
Over time, the hydrogen gas in the nebula is pulled together by gravity and it begins to spin. As the gas spins faster, it heats up and becomes as a protostar. Eventually the temperature reaches 15,000,000 degrees and nuclear fusion occurs in the cloud’s core. The cloud begins to glow brightly, contracts a little, and becomes stable.
What happens to a star at the end of its life?
The core is stabilized and the end is near. The star will now begin to shed its outer layers as a diffuse cloud called a planetary nebula. Eventually, only about 20% of the star�s initial mass remains and the star spends the rest of its days cooling and shrinking until it is only a few thousand miles in diameter.
How long does it take for a star to form?
As we know that stars take millions of years in their formation. The life cycle of a star from birth till death and all the stages in between take millions of years, that’s why we find no changes in their appearance, as human life is like a fraction of the blink of an eye to these titans.