What Spectral Type Of Star That Is Still Around Formed Longest Ago?

What Spectral Type Of Star That Is Still Around Formed Longest Ago??

What spectral type of star that is still around formed longest ago? massive blue stars at the top left on the H-R diagram.

What spectral type of star has existed for the longest?

A supergiant is the largest known type of star some are almost as large as our entire solar system. Betelgeuse and Rigel are supergiants. These stars are rare.

Spectral Classes.
Star Type O
Color Blue
Approximate Surface Temperature over 25 000 K
Average Mass (The Sun = 1) 60
Examples 10 Lacertra

Which of the following stars has the longest lifetime?

red dwarfs

The stars with the longest lifetimes are red dwarfs some may be nearly as old as the universe itself.

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What is the longest stage of stellar evolution?

the main sequence phase

When the core becomes hot enough to burn Hydrogen into Helium the star enters the main sequence phase. This phase is often the longest stellar evolution phase because burning Hydrogen into Helium is a relatively slow process.

Which characteristic of a star cluster is used to determine its age?

As a cluster ages the mass of the main-sequence turnoff stars decreases. By determining the mass of the main-sequence turnoff stars we get the age of the cluster. The cluster age equals the main-sequence lifetime of the turnoff stars.

What is the largest type of star?

hypergiant
The largest known star in the universe is UY Scuti a hypergiant with a radius around 1 700 times larger than the sun. And it’s not alone in dwarfing Earth’s dominant star.Jul 25 2018

What is a stellar spectrum?

A star’s spectrum contains information about its temperature chemical composition and intrinsic luminosity. Spectrograms secured with a slit spectrograph consist of a sequence of images of the slit in the light of the star at successive wavelengths.

Which stars live longest quizlet?

Which stars live the longest? M-type stars (red dwarfs) live the longest because they consume their fuel so slowly. O and B-type stats exhaust their fuel and leave the main sequence in only a few million years.

Which of these has the longest lifetime?

Greenland sharks are currently the vertebrate species with the longest known lifespan.

Which type of star will spend the longest time on the main sequence?

Science Chapter 26
A B
Which kind of star is most likely to spend the longest time on the main sequence? a low-mass red star
Low-mass and medium-mass stars eventually turn into _______. white dwarfs
What is a spinning neutron star emitting radio waves? pulsar
The sun’s major source of fuel is _____. hydrogen
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Which stage of a stars evolution is the longest lived quizlet?

Nuclear Fusion occurs (Hydrogen into Helium and Energy) Longest stage of a star’s life. Average star is here for about 10 billion years.

Which of these phases of a small stars evolution lasts the longest?

The T Tauri phase lasts for about 100 million years after which the star will enter the longest phase of its development – the Main Sequence phase.

Which stars become neutron stars?

Any main-sequence star with an initial mass of above 8 times the mass of the sun (8 M ) has the potential to produce a neutron star. As the star evolves away from the main sequence subsequent nuclear burning produces an iron-rich core.

Which type of star cluster has a similar age and stellar content as which type of galaxy?

globular clusters
Since globular clusters form at once from a single giant molecular cloud a cluster’s stars have roughly the same age and composition.

What do star clusters and associations have to do with star formation?

What do star clusters and associations have to do with star formation? The end result of cloud collapse is a group of stars all formed from the same parent cloud and lying in the same region of space. Such a collection of stars is called a star cluster.

What characteristics of a star cluster determine its age quizlet?

red supergiants like Betelguese and Antares. Noting the turnoff mass in a star cluster allows you to determine its: age.

What is the largest star ever discovered?

UY Scuti

But of all the stars we can discern the largest is the peculiarly named UY Scuti which measures approximately 1 708 ±192 solar radii.

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What is the biggest star ever discovered?

UY Scuti

Although it’s difficult to pin down the exact traits of any given star based on what we know the largest star is UY Scuti which is some 1 700 times as wide as the Sun.

What is the third biggest star?

RW Cephei

The third-largest star in the Universe belongs to the constellation Cepheus in the northern hemisphere sky. An orange hypergiant with the solar radii of 1535 RW Cephei is 11 400 lights years away from Earth’s surface.

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Why are spectra of stars different?

The primary reason that stellar spectra look different is because the stars have different temperatures. Most stars have nearly the same composition as the Sun with only a few exceptions. Hydrogen for example is by far the most abundant element in most stars.

What is an M type star?

M stars are coolest and most common stars in the Universe. M stars range in temperature from 2 500 Kelvin and go all the way up to 3 500 Kelvin. … Most M stars are tiny red dwarfs with less than 50% of the mass of the Sun but some are actually giants and supergiants like the red giant Betelgeuse.

How long do B type stars live?

…of spectral types O and B. They have absolute luminosities as bright as any star in the Galaxy—on the order of one million times the luminosity of the Sun. Such stars have very short lifetimes only lasting a few million years.

What is planetary nebula quizlet?

A planetary nebula is the ejected shell of an evolved giant star. It is the shape of a spherical shell and is composed of relatively cool thing gas which was once the outer part of the star. A planetary nebula is associated with the death of a low mass star.

What is stellar evolution quizlet?

Stellar Evolution. The process by which a star changes over the course of time. Stage 1. Stars are born in a region of high-density Nebula and condense into a huge globule of gas and dust and contracts under its gravity. You just studied 12 terms!

Which of these star clusters is the oldest?

A team of astronomers using the Gemini-South telescope has discovered one of the oldest stellar clusters in the Milky Way. The team’s results date the globular cluster named HP 1 at about 12.8 billion years making its stars among the oldest ever found in our Galaxy.

Which stars live the longest lives on the main sequence the shortest Why?

The most massive stars have the shortest lifetimes. Because they have most fuel they burn it so prodigously that their lifetimes are very short. A stars time on the main sequence varies from a few million to 2×1011.

Which of these stars is the most massive Which of these stars is the most massive?

Although R136a1 is the most massive known star it is not the largest since it only stretches about 30 times the radius of our sun. The largest known star is UY Scuti a hypergiant with a radius somewhere around 1 700 times larger than the sun. Its mass however is only 30 times that of our nearest star.

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Are the very largest and brightest of all the stars?

The stars known as SUPERGIANTS are the very largest and brightest of all the stars.

Which kinds of stars are most common in a newly formed star cluster?

What kinds of stars are most common in a newly formed star cluster? M stars. What law explains why a collapsing cloud usually forms a protostellar disk around a protostar?

Which main sequence star spectral type has the longest hydrogen burning lifetime?

O5 V star

Type O Main Sequence stars

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The most massive stars stars are the Type O stars which are 50 times more massive than the Sun. These stars are very luminous and use up their available H very quickly. Hydrogen-burning lifetime for a O5 V star is about 106 years.

Which of the following types of stars will spend the longest time on the main sequence group of answer choices?

t = Sun MS lifetime = 1010
M = mass of star
M = solar mass

In what stage are stars the most stable?

main sequence phase
A star will enjoy most of its life in the main sequence phase. At this point nuclear fusion is turning hydrogen into helium. The star is only stable because the light pressure of this energy balances out the star’s gravitational collapse.

What stage do stars spend most of their lives?

the Main Sequence

Stars live out the majority of their lives in a phase termed as the Main Sequence. Once achieving nuclear fusion stars radiate (shine) energy into space.

Will a stars life cycle be shorter or longer if its mass is greater?

A star’s life cycle is determined by its mass. 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.

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