what is the likely reason that we cannot find any examples of the first generation stars?

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What Is The Likely Reason That We Cannot Find Any Examples Of The First Generation Stars??

What is the likely reason that we cannot find any examples of the first generation stars? The first generation stars were all very massive and exploded as supernova.

Which of the following would be a reason why scientists think that our solar system must have formed sometime after nearby supernovae explosions?

It is produced during the supernova explosions of high-mass stars. Why do scientists think that our solar system must have formed sometime after nearby supernovae explosions? … The two stars should be the same age, so the more massive one should have become a giant first.

What prevents the pressure from increasing as a Protostellar cloud contracts due to its gravity quizlet?

It is absorbed by dust grains and heats up the cloud. density only. What prevents the pressure from increasing as a cloud contracts due to its gravity? Thermal energy is converted to radiative energy via molecular collisions and released as photons.

What prevents the pressure from increasing too greatly in a molecular cloud as it contracts due to gravity thus allowing continued contraction and star formation?

When the cloud’s thermal energy can no longer escape in the form of photons, the cloud heats up and the pressure rises. This resists the pull of gravity and slows the contraction. what is a protostar?

How long does the Protostellar stage last for a star like our sun?

A protostar is a very young star that is still gathering mass from its parent molecular cloud. The protostellar phase is the earliest one in the process of stellar evolution. For a low-mass star (i.e. that of the Sun or lower), it lasts about 500,000 years.

What would you be most likely to find if you returned to the Solar System in 10.0 billion years?

What would you be most likely to find if you returned to the solar system in 10.0 billion years? If the Sun had been born as a high-mass star 4 1/2 billion years ago rather than as a low-mass star, the planet Jupiter would probably have Earth-like conditions today, while Earth would be hot like Venus.

Why does the sun not explode?

The gravitational pull of the mass of the sun is kept in check by the fusion that this pull provides. Thus the Sun is at exactly the equilibrium of these two forces. In other words, the Sun doesn’t explode because its forces are balanced.

What prevents the pressure from increasing as a cloud contracts due to its gravity group of answer choices?

What prevents the pressure from increasing as a cloud contracts due to its gravity? Thermal energy is converted to radiative energy via molecular collisions and released as photons. Calculations show that gravity begins to overcome thermal pressure in clouds that are: More massive than a hundred times the Sun.

What prevents a brown dwarf from undergoing nuclear fusion?

What prevents a brown dwarf from undergoing nuclear fusion? … Degeneracy pressure prevents a brown dwarf from undergoing nuclear fusions.

What does the gravitational force in a molecular cloud depends on?

The latter depends both on the density and temperature of the cloud. The high densities in molecular clouds means that the gravitational forces are relatively strong but the pressure is no higher than elsewhere because the temperatures are low.

What will happen if the cloud does not have enough mass?

Some objects in space are created from clouds of gas and dust. What will happen if the cloud does not have enough mass? A core will form. … Gravity pulls gas and dust together.

Why star formation happens in giant molecular clouds?

Star formation

The formation of stars occurs exclusively within molecular clouds. This is a natural consequence of their low temperatures and high densities, because the gravitational force acting to collapse the cloud must exceed the internal pressures that are acting “outward” to prevent a collapse.

Why is it important for a molecular cloud to be cold for star formation?

Molecular clouds are rare, but are important parts of the galaxy where molecules form and evolve. In the colder, denser areas, and under the right conditions, stars are formed. … Understanding how molecules are released from dust at low temperatures is crucial to explaining how chemicals evolve in such cold clouds.

Why do nuclear reactions in a star occur only near its center?

Why do nuclear reactions in a star occur only near its center? Nuclear reactions occur at the center of a star because the core has the correct temperature, pressure, and density. … The pressure gets higher the deeper the star, meaning that the density, and therefore temperature, must be higher as well.

What is T Tauri stage?

It begins life as a protostar still enshrouded in its natal molecular cloud, accreting new material and developing a proto-planetary disc. Slowly, stellar winds and radiation blow away the surrounding shell of gas and dust, and the third stage, when the surrounding envelope has cleared, is called the T-Tauri phase.

What law explains why a collapsing cloud usually forms a Protostellar disk around a protostar?

Thermal energy is converted to radiative energy via molecular collisions and released as photons. … What happens to the rotation rate (speed) of a molecular cloud as it collapses to form a star? The rotation rate increases and the gas flattens into a disk around a protostar.

What is the ultimate fate of our Sun quizlet?

Gas ejected from a low-mass star in the final stage of its life. The ultimate fate of our Sun is to____. become a white dwarf that will slowly cool with time.

What is the fate of an isolated brown dwarf?

What is the fate of an isolated brown dwarf? it will remain a brown dwarf forever.

Why can iron not be fused?

Iron cannot be fused into anything heavier because of the insane amounts of energy and force required to fuse iron atoms. The atomic structure of iron is very stable, more so than most other elements.

Can sun become a black hole?

No. Stars like the Sun just aren’t massive enough to become black holes. Instead, in several billion years, the Sun will cast off its outer layers, and its core will form a white dwarf – a dense ball of carbon and oxygen that no longer produces nuclear energy, but that shines because it is very hot.

Does black hole have gravity?

Black holes are points in space that are so dense they create deep gravity sinks. Beyond a certain region, not even light can escape the powerful tug of a black hole’s gravity.

What will happen 5 billion years from now?

Five billion years from now, the sun will have grown into a red giant star, more than 100 times larger than its current size. It will also experience an intense mass loss through a very strong stellar wind. The end product of its evolution, 7 billion years from now, will be a tiny white dwarf star.

What force prevents the inward pull of gravity from pulling the sun ball of gas inward and collapsing it?

Gravity constantly works to try and cause the star to collapse. The star’s core, however is very hot which creates pressure within the gas. This pressure counteracts the force of gravity, putting the star into what is called hydrostatic equilibrium.

What happens when an interstellar cloud fragment contracts?

What happens when an interstellar cloud fragment contracts? Its pressure increases.

What happens when a star’s core runs out of hydrogen and why does this occur?

When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts. The outer shell of the star, which is still mostly hydrogen, starts to expand. As it expands, it cools and glows red.

Why does a brown dwarf not count as a star?

These objects, known as brown dwarfs, have many of the elements of their more famous siblings but lack the mass needed to jumpstart nuclear fusion in their core. Because brown dwarfs never burn fusion at their core, scientists sometimes refer to them as “failed stars.”

What are brown dwarfs quizlet?

Brown dwarf. A star-like object that has insufficient mass to start nuclear reactions in its core and thus become self-luminous.

Which of the following is not true about differences between novae and supernovae?

Which of the following is not true about differences between novae and supernovae? Supernovae eject gas into space but novae do not. Will our Sun ever undergo a white dwarf supernova explosion?

What external forces may have triggered the collapse of molecular clouds?

Summary: Stars form in cold, dense regions of space called molecular clouds. When the force of gravity pulling in on the cloud is greater than the strength of internal pressure pushing out, the cloud collapses into a protostar.

What prevents the pressure from increasing too greatly in a molecular cloud as it contracts due to gravity thus allowing continued contraction and star formation?

When the cloud’s thermal energy can no longer escape in the form of photons, the cloud heats up and the pressure rises. This resists the pull of gravity and slows the contraction. what is a protostar?

What prevents the pressure from increasing as a cloud contracts due to its gravity quizlet?

What prevents the pressure from increasing as a cloud contracts due to its gravity? … The pressure is transferred from the center of the cloud to its outer edges where it can dissipate. C) Thermal energy is converted to radiative energy via molecular collisions and released as photons.

What will happen if the cloud does not have enough mass quizlet?

What will happen if the cloud does not have enough mass? A star will not form. Which event signals the birth of a star? Extreme heat and pressure causes nuclear fusion.

What color are the hottest stars?

Blue stars
White stars are hotter than red and yellow. Blue stars are the hottest stars of all.

What happens first when a star begins to run out of fuel Brainly?

The star’s core shrinks. The star becomes a black hole.

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