ISP 205 Review Questions, Week 10
... more luminous than the other, what are the relative diameters of the two stars? Luminosity = (surface area) (Energy emitted per unit surface area) If the temperatures are the same, the energy emitted per unit surface will be the same. So the more luminous star must have 10,000 times more surface a ...
... more luminous than the other, what are the relative diameters of the two stars? Luminosity = (surface area) (Energy emitted per unit surface area) If the temperatures are the same, the energy emitted per unit surface will be the same. So the more luminous star must have 10,000 times more surface a ...
Astronomy
... 23. What process creates the light emitted by stars? 24. Stars spend most of their lives in this stage: 25. A visual representation of the temperature and luminosity of stars is called: 26. Relatively dark spots on the sun that contains intense magnetic fields are known as: 27. These reactions join ...
... 23. What process creates the light emitted by stars? 24. Stars spend most of their lives in this stage: 25. A visual representation of the temperature and luminosity of stars is called: 26. Relatively dark spots on the sun that contains intense magnetic fields are known as: 27. These reactions join ...
Characteristics of Stars
... • Absolute Magnitude: the “Real” brightness of the star. How much light it really gives off.(Need to know the distance to the Star) • Apparent Magnitude: How bright the star appears to be. ...
... • Absolute Magnitude: the “Real” brightness of the star. How much light it really gives off.(Need to know the distance to the Star) • Apparent Magnitude: How bright the star appears to be. ...
There's more than one way to make a Blue Straggler 1
... The more massive star in this double-star system cannibalizes its partner, creating a single, even more massive star. ...
... The more massive star in this double-star system cannibalizes its partner, creating a single, even more massive star. ...
Stars and Their Characteristics
... • nebula may condense when an outside force acts upon it • particles move closer together under gravity • increase density = increase temperature • if nebula glows, called protostar • center will become hotter until fusion takes place and a star is born ...
... • nebula may condense when an outside force acts upon it • particles move closer together under gravity • increase density = increase temperature • if nebula glows, called protostar • center will become hotter until fusion takes place and a star is born ...
On my webpage, find the link Star Life Cycle and use it to answer the
... Click the “brown dwarf” link in Option 1 6. How many solar masses are brown dwarfs on average? ...
... Click the “brown dwarf” link in Option 1 6. How many solar masses are brown dwarfs on average? ...
wk09noQ
... core; A main sequence star is also called a dwarf • The time spent by a star on the main sequence (i.e., the time it takes to finish burning hydrogen in its core) depends on its mass • Stars like the Sun have main sequence lifetimes of several billion years; Less massive stars have longer lifetimes; ...
... core; A main sequence star is also called a dwarf • The time spent by a star on the main sequence (i.e., the time it takes to finish burning hydrogen in its core) depends on its mass • Stars like the Sun have main sequence lifetimes of several billion years; Less massive stars have longer lifetimes; ...
Characteristics of Stars
... Way it would take 25,000 years traveling at the speed of light. That is a distance of 250 million billion kilometers. ...
... Way it would take 25,000 years traveling at the speed of light. That is a distance of 250 million billion kilometers. ...
Stars from Afar
... An HR diagram shows the two most important characteristics of stars, which are temperature and absolute magnitude (brightness) and/or luminosity. ...
... An HR diagram shows the two most important characteristics of stars, which are temperature and absolute magnitude (brightness) and/or luminosity. ...
Stars
... Apparent magnitude: brightness as seen from Earth Absolute magnitude: brightness if it were a standard distance from Earth ...
... Apparent magnitude: brightness as seen from Earth Absolute magnitude: brightness if it were a standard distance from Earth ...
LT 5: I can describe how astronomers determine the composition
... star a large celestial body that is composed of gas and that emits light. Nuclear fusion is the combination of light atomic nuclei to form heavier atomic nuclei Astronomers learn about stars by analyzing the light that the stars emit. ...
... star a large celestial body that is composed of gas and that emits light. Nuclear fusion is the combination of light atomic nuclei to form heavier atomic nuclei Astronomers learn about stars by analyzing the light that the stars emit. ...
PowerPoint File
... The Helium shell-burning is unstable and sends thermal pulses through the star, throwing off the outer layers of the star into space. As the outer layers are peeled back, it reveals the extremely hot, ultraviolet-emitting carbon and oxygen core which ionizes the ...
... The Helium shell-burning is unstable and sends thermal pulses through the star, throwing off the outer layers of the star into space. As the outer layers are peeled back, it reveals the extremely hot, ultraviolet-emitting carbon and oxygen core which ionizes the ...
Life cycle of the Stars - Christos N. Hadjichristidis
... Throughout its life, these two forces determine the stages of a star’s life. ...
... Throughout its life, these two forces determine the stages of a star’s life. ...
stars concept review
... d. galaxies are forming. _____ 8. A star moving away from Earth has a spectrum that is a. losing its color. c. shifted toward red. b. shifted toward blue. d. unchanged. _____ 9. About how many stars are visible from Earth without a telescope? a. 6,000 c. 3 billion b. many billions d. a million _____ ...
... d. galaxies are forming. _____ 8. A star moving away from Earth has a spectrum that is a. losing its color. c. shifted toward red. b. shifted toward blue. d. unchanged. _____ 9. About how many stars are visible from Earth without a telescope? a. 6,000 c. 3 billion b. many billions d. a million _____ ...
Star Life Cycle and classroom textbooks for research!
... Star Life Cycle You need to investigate the life cycle of stars and other objects in the universe. Use the internet and classroom textbooks for research! You may work alone or with a partner and turn in one assignment. You may type your answers directly within this document or in PowerPoint. Turn yo ...
... Star Life Cycle You need to investigate the life cycle of stars and other objects in the universe. Use the internet and classroom textbooks for research! You may work alone or with a partner and turn in one assignment. You may type your answers directly within this document or in PowerPoint. Turn yo ...
A Star is Born!
... • The Zero Age Main Sequence (ZAMS) represents the onset or start of nuclear burning (fusion) • The properties of a star on the ZAMS are primarily determined by its mass, somewhat dependent on composition (He and heavier elements) ...
... • The Zero Age Main Sequence (ZAMS) represents the onset or start of nuclear burning (fusion) • The properties of a star on the ZAMS are primarily determined by its mass, somewhat dependent on composition (He and heavier elements) ...
Star
A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Other stars are visible from Earth during the night, appearing as a multitude of fixed luminous points in the sky due to their immense distance from Earth. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explodes. Near the end of its life, a star can also contain degenerate matter. Astronomers can determine the mass, age, metallicity (chemical composition), and many other properties of a star by observing its motion through space, luminosity, and spectrum respectively. The total mass of a star is the principal determinant of its evolution and eventual fate. Other characteristics of a star, including diameter and temperature, change over its life, while the star's environment affects its rotation and movement. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.A star's life begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Once the stellar core is sufficiently dense, hydrogen becomes steadily converted into helium through nuclear fusion, releasing energy in the process. The remainder of the star's interior carries energy away from the core through a combination of radiative and convective processes. The star's internal pressure prevents it from collapsing further under its own gravity. Once the hydrogen fuel at the core is exhausted, a star with at least 0.4 times the mass of the Sun expands to become a red giant, in some cases fusing heavier elements at the core or in shells around the core. The star then evolves into a degenerate form, recycling a portion of its matter into the interstellar environment, where it will contribute to the formation of a new generation of stars with a higher proportion of heavy elements. Meanwhile, the core becomes a stellar remnant: a white dwarf, a neutron star, or (if it is sufficiently massive) a black hole.Binary and multi-star systems consist of two or more stars that are gravitationally bound, and generally move around each other in stable orbits. When two such stars have a relatively close orbit, their gravitational interaction can have a significant impact on their evolution. Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.