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What does it mean when a star goes off the main sequence?
When a star "goes off the main-sequence" it generally means the star has run out of hydrogen fuel and is beginning the post-main-sequence or its end of life phase. The main sequence of a star is the time where it is no longer just a proto-star but is burning hydrogen as a primary source of fuel.
When a star is fully formed which type of star does it become?
A Main Sequence star.
What 2 things can happen to a star after a supernova?
It can either become a neutron star or a black hole. If the star is between 8 and 15 solar masses, it will become an incredibly dense neutron star. If it is more than 15 solar masses, it will collapse and become an even denser black hole.
What happens when a star uses hydrogen?
A neutron or white dwarf star is created in most cases when the star isn't large enough to collapse under its own weight and form a black hole. Our sun will be one of those stars.
What cause proto stars to expand?
Proto stars expand primarily due to the gravitational forces acting on them as they accumulate mass. As they gather material from their surrounding molecular cloud, the increasing pressure and temperature at their core can lead to nuclear fusion. This process generates energy that counteracts gravitational collapse, causing the proto star to expand. Additionally, the balance between gravitational contraction and thermal pressure from nuclear reactions influences their size and stability during this phase.
What temperature does a star start to fuse hydrogen?
The temperature at which hydrogen fuses is 10,000,000 degrees Kelvin. This is the minimum temperature the core of a proto star has to have to become a true star.
Is a proto oncogene the same as an oncogene?
No, a proto-oncogene and an oncogene are not the same. A proto-oncogene is a normal gene that plays a role in cell growth and division. When mutated or abnormally expressed, a proto-oncogene can become an oncogene, which promotes uncontrolled cell proliferation and contributes to cancer development. Thus, while all oncogenes originate from proto-oncogenes, not all proto-oncogenes become oncogenes.
What causes the heat to grow in a proto-star?
Compression. Whenever anything is compressed, it heats up. In a proto-star, clouds of hydrogen gas are compressed by gravitational attraction, and the compression heats the gas.
What is the dense center of a stellar nebula after it spins into a disk shape?
A "proto-star".
When proto-oncogenes mutate they may become?
They are called oncogenes.
What are proto-oncogenes and how do they differ from oncogenes?
Proto-oncogenes are normal genes that help regulate cell growth and division. When mutated or altered, they can become oncogenes, which promote uncontrolled cell growth and can lead to cancer. The main difference is that proto-oncogenes are normal genes that can become oncogenes through mutations.
Who named the protostar and why?
No one. It comes from the Greek - proto - meaning first. So first star - a protostar.
A mass of gas in space made hot by nuclear reactions?
A 'proplid', or a proto-stellar object, often called a proto-star, and some believe (as I do) that 'Herbig-Haro Objects', are newly formed stars. At any rate, a star is a mass of gas in space made hot by nuclear reactions.
What causes starts to form out of gas clouds?
Stars form from gas clouds when gravity causes the gas to condense and heat up, eventually reaching temperatures and pressures that trigger nuclear fusion. This fusion reaction releases energy, causing the proto-star to shine and become a fully-fledged star.
Is it true or false that only individuals with cancer have proto-oncogenes?
False. Proto-oncogenes are genes that can potentially become oncogenes, which are associated with cancer development. They are present in all individuals, not just those with cancer.
In the movie Tim refers to baby stars as protostars what can you infer about the prefix proto?
The prefix "proto-" typically means "first" or "primary," indicating that a protostar is an early stage in the formation of a star. This suggests that protostars are the initial phase in stellar development, where matter begins to clump together and heat up before eventually becoming a fully formed star. The use of "proto" highlights the evolutionary process that stars undergo from formation to maturity.
What is a protoplanetary disk?
A disk of gas ad dust that forms round a proto-star as the star coalesces at the center and from which planets accurate. The related links below give more information.
