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A "star" must produce energy via fusion.
This is a nuclear reaction in which nuclei (usually hydrogen) ram together at a high enough speed to form a nucleus with more protons than either of the original nuclei. For instance, a proton/neutron nucleus might smash into another proton/neutron nucleus and forming a nucleus of two protons and two neutrons.
This reaction can only be self-sustaining if there is enough energy during the reaction to end up as heat in other nuclei, which then blast into other nuclei and cause more fusion reactions. Because of that, there must be a fairly dense amount of fusionable material at a high temperature in order for a star to form.
The minimum temperature needed to permit fusion is about 8 million degrees Kelvin. Minimum densities would have to be about 10^15 particles per cubic centimeter, on the order of atmospheric pressure.
What else can I help you with?
Why is there only some stars that shoot?
A shooting star is not actually a star. It is a meteorite going through our atmosphere. It becomes white hot as it heats up from the friction in our atmosphere and usually burns up.
When hot lava cooled and hardened it becomes?
Hot lava cools and hardens into igneous rock.
How does a rock turn into lava?
The rock becomes too hot that it must turn into liquid form (lava). This would usually mean that the rock had to have come into contact with lava first.
What is a solar system object that enters Earths atmosphere and becomes very hot?
A meteoroid is a solar system object that enters Earth's atmosphere and becomes very hot due to friction with the air. As it travels through the atmosphere, the meteoroid heats up and creates a bright streak of light called a meteor, commonly known as a shooting star.
What reaction occurs in a protostar that has becomes very hot?
garbanzos
What happens to a high mass star as it ages?
it becomes a volcanic rock that is still very hot but bot as hot as the star was originally
Why does it take about 1 minute before water hot finally becomes hot in any bathroom or shower in the house?
Because the water in the pipes is at room temperature. You must push all that cool water out with the hot water before the hot water reaches your faucet.
How many years will it take for life to become extinct on earth before the sun becomes a red giant star?
It is expected that in a few hundred million years, it will become too hot on Earth for any kind of life we know.
Why is there only some stars that shoot?
A shooting star is not actually a star. It is a meteorite going through our atmosphere. It becomes white hot as it heats up from the friction in our atmosphere and usually burns up.
What are the disadvantages of boiling water for drinking?
It is hot and must be cooled before consumption.
What happens to steam before it becomes water vapour?
Steam is water vapour - just a very hot form of it.
Why do you sweat when you wear a sweater in summer?
You sweat because it is hot outside and the sweater keeps the heat in your body. Your body becomes too hot and must naturally cool itself by sweating.
What must be done to hot-rolled steel in the mill before it can be cold finished?
Hot rolled steel must be descaled by pickling in acid with a lime water rinsebefore it can be cold finished
What force is most responsible for the formation of a star?
Gravity is the most responsible force for the formation of a star. As a cloud of gas and dust contracts due to gravity, the material in the core becomes dense and hot enough to ignite nuclear fusion, leading to the birth of a star.
How long can hot food sit out before it becomes unsafe to eat?
Hot food should not sit out at room temperature for more than 2 hours before it becomes unsafe to eat. After 2 hours, bacteria can start to grow rapidly, increasing the risk of foodborne illness. It is important to refrigerate or reheat hot food within this time frame to ensure food safety.
Why a wonder wheel which was rotating becomes hot after a sudden stop?
it becomes hot due to friction
How does a star turn into a white dwarf star?
A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains. This core becomes a very hot white dwarf, with a temperature exceeding 100,000 kelvin.
