What is the single most important property of a star that will determine its evolution quizlet?
degenerate-matter object gets smaller as it gets more massive. at the top left of the main sequence. What is the single most important property of a star that will determine its evolution? As a star leaves the main sequence, it moves up and to the right on the H-R diagram.
What is the single most important quantity in determining the evolution of a star?
Mass: the most important factor in determining the life of a star. Gravity & Internal heat: balance that determines evolutionary stage of a star's life.
What property of a star is the most important to measure in order to determine its characteristics?
In fact, the mass of a star also determines its most important properties: its luminosity, temperature and radius. A star's luminosity, which is how much energy is emitted per second from the star, is measured in Watts or in solar luminosities (L⊙) where 1L⊙ = 3.85 x 1026 Watt.
What is the single most important property of a star?
Mass – The single most important property that determines other properties of the star. Luminosity – The total amount of energy (light) that a star emits into space.
What is the most important concept about stars on the main sequence quizlet?
While on the main sequence, a star is stable because there is a balance between its self-gravity trying to make the star collapse in on itself and the outward pressure of the gas heated by nuclear fusion trying to make it expand.
How does mass determine the main sequence lifetime of a star?
The overall lifespan of a star is determined by its mass. Since stars spend roughly 90% of their lives burning hydrogen into helium on the main sequence (MS), their 'main sequence lifetime' is also determined by their mass.
What is the evolution of a star?
Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe.
How do stars form and evolve?
Stars form from an accumulation of gas and dust, which collapses due to gravity and starts to form stars. The process of star formation takes around a million years from the time the initial gas cloud starts to collapse until the star is created and shines like the Sun.
What are the main properties of stars quizlet?
Terms in this set (25)
- stellar properties. there are six important properties of stars.
- distance. measure parallax for closer stars.
- effective temperature (T) determined from continuous spectrum (blackbody curve), wien's law.
- luminosity (L) …
- chemical composition. …
- radius (R) …
- mass (M) …
- closest star.
What is a stellar property?
Introductory Astronomy: Stellar Properties Stars are the keys to understanding the secrets of the Universe. It is by studying the stars that astronomers learn about the formation of planets, the origin of the elements, the characteristics of galaxies, and the future of our Solar System.
What property determines star type?
Astronomers group stars into general types based on their temperature. Temperature is chosen because the color of a star depends on the temperature and color is a easily seen characteristic, regardless of the distance. However, using color as a temperature probe gives only a crude measurement of the star's temperature.
What are the two most important intrinsic properties used to classify stars?
The two most important intrinsic properties which are used to classify stars are luminosity and surface temperature.
What main factor determines the stages a star will follow after the main sequence?
mass The amount of mass a star has determines which of the following life cycle paths it will take from there. The life cycle of a low mass star (left oval) and a high mass star (right oval).
What are two main requirements for a star to be on the main sequence?
Main Sequence Membership For a star to be located on the Main Sequence in the H-R diagram: It must be in Hydrostatic Equilibrium (Pressure balances Gravity) It must be in Thermal Equilibrium (Energy Generation balances Luminosity) It must generate energy by "burning" Hydrogen into Helium in its core.
How do you determine a star’s life?
The lifetime of a star is proportional to the amount of fuel it has (its mass) divided by the rate at which it expends the fuel (its luminosity). Therefore, you can estimate the lifetime t to be proportional to M/L.
What is the single most important characteristic in determining the course of a star’s evolution?
Mass is the single most important property of a star. It determines the evolution of a star as well as its lifetime (e.g. lower mass stars live longer).
What are the properties of stars?
PROPERTIES OF STARS
- DISTANCE. This is determined from trigonometric and spectroscopic parallaxes. …
- LUMINOSITY. This is the amount of energy generated in the star and released as electromagnetic radiation.
- BRIGHTNESS. …
- RADIUS. …
- CHEMICAL COMPOSITION. …
- TEMPERATURE.
Why do star evolve?
Due to fusion, stars evolve due to two factors: gravity and pressure. The star collapses when gravity exceeds pressure, and the star expands when pressure overcomes gravity. The evolution of stars is driven by nuclear fusion and fission events in the stars. The mass of the stars determines their final stage.
What are the important characteristics of a star?
A star can be defined by five basic characteristics: brightness, color, surface temperature, size and mass.
What are the main characteristics used to classify stars?
Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars vary in their chemical composition. Astronomers use spectrographs to determine the elements found in stars.
Is mass the most important property of a star?
Mass is the most important stellar property. This is because a star's life is a continuous fight against gravity, and gravity is directly related to mass. The more massive a star is, the stronger its gravity. Mass therefore determines how strong the gravitational force is at every point within the star.
What properties of a star determine its luminosity quizlet?
A star's luminosity depends on the star's temperature and size, and both of those things are determined by the star's mass. 7) A star's magnitude is a measure of it's brightness.
What are the main properties of stars?
A star can be defined by five basic characteristics: brightness, color, surface temperature, size and mass.
- Brightness. Two characteristics define brightness: luminosity and magnitude. …
- Color. A star's color depends on its surface temperature. …
- Surface Temperature. …
- Size. …
- Mass.
Mar 13, 2018
What are some important physical properties of stars?
A star can be defined by five basic characteristics: brightness, color, surface temperature, size and mass.
- Brightness. Two characteristics define brightness: luminosity and magnitude. …
- Color. A star's color depends on its surface temperature. …
- Surface Temperature. …
- Size. …
- Mass.
Mar 13, 2018
What is the main factor that causes the evolution of stars?
The primary factor determining how a star evolves is its mass as it reaches the main sequence. The following is a brief outline tracing the evolution of a low-mass and a high-mass star. Stars are born out of the gravitational collapse of cool, dense molecular clouds.
What is the main sequence What basic property of a star determines where it lies on the main sequence?
What basic property of a star determines where it lies on the main sequence? A star's mass will determine where it lies on the main sequence. The most massive stars are in the upper left end while the lowest mass stars are in the lower right end.
What are the two most important properties used to classify stars?
The two most important intrinsic properties which are used to classify stars are luminosity and surface temperature.
What physical property of a star does the spectral type measure?
Cards
| Term Which statement about stellar motion is incorrect | Definition Proper motion is measured in intervals of 6 months |
|---|---|
| Term What physical property of a star does the spectral type measure? | Definition temperature |
| Term Which star would be the hottest? | Definition B0 |
•Feb 27, 2012
What is the importance of star?
In addition stars are very important because they make life on Earth. the most important is the Sun, because without that it wouldn't be life on Earth . Earth would just be a rock with ice. For example: Ancient sailors used the stars to help guide them while they were at sea.
Which is the most useful in classifying stars?
Color Color is the most common way to classify stars.