The Family of Stars
... more luminous than star A, so star B must be further away. The flux received from both stars is the same, but star B is 100 times more luminous than star A, so star B must be further away. Both stars are equally luminous, but the flux received from star A is 5 times less than from star B, so star A ...
... more luminous than star A, so star B must be further away. The flux received from both stars is the same, but star B is 100 times more luminous than star A, so star B must be further away. Both stars are equally luminous, but the flux received from star A is 5 times less than from star B, so star A ...
The Temperature of Stars
... Apparent magnitude the brightness of a star as seen from the Earth. The apparent magnitude of a star depends on both how much light the star emits and how far the star is from Earth. Absolute magnitude the brightness that a star would have at a distance of 32.6 lightyears from Earth. The brighter a ...
... Apparent magnitude the brightness of a star as seen from the Earth. The apparent magnitude of a star depends on both how much light the star emits and how far the star is from Earth. Absolute magnitude the brightness that a star would have at a distance of 32.6 lightyears from Earth. The brighter a ...
Chap 11 Characterizing Stars v2
... the constellation Orion labeled with their names and apparent magnitudes. ...
... the constellation Orion labeled with their names and apparent magnitudes. ...
The Life Cycle of a Star and the Hertzsprung
... stars of different ages and in different stages, all at the same time. It is also a great tool to check your understanding of the star life cycle. In the Hertzsprung-Russell (HR) Diagram, each star is represented by a dot. There are lots of stars out there, so there are lots of dots. The position of ...
... stars of different ages and in different stages, all at the same time. It is also a great tool to check your understanding of the star life cycle. In the Hertzsprung-Russell (HR) Diagram, each star is represented by a dot. There are lots of stars out there, so there are lots of dots. The position of ...
Star- large ball of gas held together by large ball of gas held
... molecules that clump up due to gravity. When the clump reaches the size of Jupiter, it creates enough energy by nuclear fusion to shine – becoming a star. For stars that are about the size of our sun, after main sequence they become giants, white dwarfs, and then black dwarfs. For stars larger than ...
... molecules that clump up due to gravity. When the clump reaches the size of Jupiter, it creates enough energy by nuclear fusion to shine – becoming a star. For stars that are about the size of our sun, after main sequence they become giants, white dwarfs, and then black dwarfs. For stars larger than ...
Star - Uplift Education
... Cepheid variables are stars with regular variation in absolute magnitude (luminosity) (rapid brightening, gradual dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces wit ...
... Cepheid variables are stars with regular variation in absolute magnitude (luminosity) (rapid brightening, gradual dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces wit ...
For stars
... As the Sun sets, some stars are visible. These are the first magnitude stars. Later, when twilight is over, more stars are visible. These are the second magnitude stars, and so on…Is this apparent magnitude or absolute magnitude? ...
... As the Sun sets, some stars are visible. These are the first magnitude stars. Later, when twilight is over, more stars are visible. These are the second magnitude stars, and so on…Is this apparent magnitude or absolute magnitude? ...
Powerpoint Presentation (large file)
... • Relatively young Population I stars are metal rich; ancient Population II stars are metal poor • The metals (heavy elements) in Population I stars were manufactured by thermonuclear reactions in an earlier generation of Population II stars, then ejected into space and incorporated into a later ste ...
... • Relatively young Population I stars are metal rich; ancient Population II stars are metal poor • The metals (heavy elements) in Population I stars were manufactured by thermonuclear reactions in an earlier generation of Population II stars, then ejected into space and incorporated into a later ste ...
Objectives
... • Less massive stars burn cooler and therefore can last longer • Our Sun will fuse hydrogen for about 10 billion years • Once a star’s Hydrogen supply runs out, fusion stops and the core begins to contract • At this time, the outer layers of hydrogen fuse at an incredible rate and the star expands t ...
... • Less massive stars burn cooler and therefore can last longer • Our Sun will fuse hydrogen for about 10 billion years • Once a star’s Hydrogen supply runs out, fusion stops and the core begins to contract • At this time, the outer layers of hydrogen fuse at an incredible rate and the star expands t ...
Today`s Powerpoint
... - Whole star pulsates more and more violently. - Eventually, shells thrown off star altogether! 0.1 - 0.2 MSun ejected. - Shells appear as a nebula around star, called "Planetary Nebula" (awful, historical name, nothing to do with planets). ...
... - Whole star pulsates more and more violently. - Eventually, shells thrown off star altogether! 0.1 - 0.2 MSun ejected. - Shells appear as a nebula around star, called "Planetary Nebula" (awful, historical name, nothing to do with planets). ...
Stars
... replaced with Wolf 359, it would only be ten times brighter than a full moon on Earth and it would be difficult to make out its spherical shape without a telescope. For Star Trek officianadoes, this is the site where the Federation lost 40 ships in an attack by the Borg. BD +36 degrees 2147 Another ...
... replaced with Wolf 359, it would only be ten times brighter than a full moon on Earth and it would be difficult to make out its spherical shape without a telescope. For Star Trek officianadoes, this is the site where the Federation lost 40 ships in an attack by the Borg. BD +36 degrees 2147 Another ...
Stars
... at one end of a playing field. You hold a baseball. Your friend holds a basketball. You know that a basketball is much larger than a baseball. But what seems to happen if you friend carries the basketball to the other end of the field? The basketball looks smaller than the baseball to you. The baske ...
... at one end of a playing field. You hold a baseball. Your friend holds a basketball. You know that a basketball is much larger than a baseball. But what seems to happen if you friend carries the basketball to the other end of the field? The basketball looks smaller than the baseball to you. The baske ...
Be Stars
... classified into are; O, B, A, F, G, K and M. O stars are the hottest, meaning the temperature of the types of stars in the ...
... classified into are; O, B, A, F, G, K and M. O stars are the hottest, meaning the temperature of the types of stars in the ...
CASPEC Observations of the Most Metal-Deficient Main
... does not lie in an obscured region, and (2) it does not illuminate fairly bright nebulosity in its immediate vicinity. Moreover, N82 is too bright to be a Herbig AelBe star. Strom et al. (1972) give a list of 12 Galactic stars of this type with known distances. If we place these stars in the SMC, th ...
... does not lie in an obscured region, and (2) it does not illuminate fairly bright nebulosity in its immediate vicinity. Moreover, N82 is too bright to be a Herbig AelBe star. Strom et al. (1972) give a list of 12 Galactic stars of this type with known distances. If we place these stars in the SMC, th ...
Finding Constellations From Orion
... Following the stars of Orion’s Belt backwards (from 3 to 1) points us to Sirius (SEER-e-us), the Dog Star. This is the brightest star in the sky, and is part of the constellation Canis Major, the Great Dog. Drawing a line from Bellatrix (bell-LAY-triks) through Betelgeuse points us to Procyon (PRO- ...
... Following the stars of Orion’s Belt backwards (from 3 to 1) points us to Sirius (SEER-e-us), the Dog Star. This is the brightest star in the sky, and is part of the constellation Canis Major, the Great Dog. Drawing a line from Bellatrix (bell-LAY-triks) through Betelgeuse points us to Procyon (PRO- ...
Extra-Solar Life: Habitable Zones
... Mercury/Venus too hot Earth – just right Mars – was OK once (?), but now cold Jupiter, Saturn, Uranus, Neptune too cold (though some moons may be OK) ...
... Mercury/Venus too hot Earth – just right Mars – was OK once (?), but now cold Jupiter, Saturn, Uranus, Neptune too cold (though some moons may be OK) ...
Stars, Galaxies & Universe
... Classifying Stars • Stars are classified by size, temperature, and brightness. • Temperature of a star is indicated by color, hot stars are blue & cooler stars are red. • Apparent brightness is the brightness of a star as observed from earth. • Absolute magnitude is the brightness of a star observe ...
... Classifying Stars • Stars are classified by size, temperature, and brightness. • Temperature of a star is indicated by color, hot stars are blue & cooler stars are red. • Apparent brightness is the brightness of a star as observed from earth. • Absolute magnitude is the brightness of a star observe ...
Answers to Coursebook questions – Chapter E2
... sequence. So it had to be to the right of and lower than the present position. ...
... sequence. So it had to be to the right of and lower than the present position. ...
ppt
... • Binaries help, because one can get mass so that theories can be tested • But stars change so slowly, it is impossible to test theories by watching just one star move through phases • Fortunately, there are 1011 stars in our Galaxy, all with a range of masses and ages! • Conveniently, many stars ar ...
... • Binaries help, because one can get mass so that theories can be tested • But stars change so slowly, it is impossible to test theories by watching just one star move through phases • Fortunately, there are 1011 stars in our Galaxy, all with a range of masses and ages! • Conveniently, many stars ar ...
Introduction to Astronomy
... Magnitude system for brightness • Smaller numbers imply brighter stars. • “Apparent magnitude” is a measure of apparent brightness. Antares has mag. 1; Polaris has mag. 2; naked eye limit is about 6. Sirius has mag. –1.5. • “Absolute magnitude” is a measure of true brightness. It’s what the apparen ...
... Magnitude system for brightness • Smaller numbers imply brighter stars. • “Apparent magnitude” is a measure of apparent brightness. Antares has mag. 1; Polaris has mag. 2; naked eye limit is about 6. Sirius has mag. –1.5. • “Absolute magnitude” is a measure of true brightness. It’s what the apparen ...
star
... spectrum have different wavelengths and different energies. You can see only a small part of the energy in these wavelengths. ...
... spectrum have different wavelengths and different energies. You can see only a small part of the energy in these wavelengths. ...
Earth Science, 10th edition Chapter 23: Beyond Our Solar System I
... b. Apparent shift in a star's position due to the orbital motion of Earth c. Measured as an angle d. Near stars have the largest parallax e. Largest parallax is less than one second of arc 3. Distances to the stars are very large 4. Units of measurement a. Kilometers or astronomical units are too cu ...
... b. Apparent shift in a star's position due to the orbital motion of Earth c. Measured as an angle d. Near stars have the largest parallax e. Largest parallax is less than one second of arc 3. Distances to the stars are very large 4. Units of measurement a. Kilometers or astronomical units are too cu ...
14.5 Yellow Giants and Pulsating Stars Variable Stars Not all stars
... stars. For example, ZZ Ceti stars, a kind of pulsating white dwarf with periods as short as a few minutes are found in the lower portion of the HR diagram. There are many stars like Mira (known as Mira variables) that have pulsation periods of about 1 year. These lie in the upper right of the HR d ...
... stars. For example, ZZ Ceti stars, a kind of pulsating white dwarf with periods as short as a few minutes are found in the lower portion of the HR diagram. There are many stars like Mira (known as Mira variables) that have pulsation periods of about 1 year. These lie in the upper right of the HR d ...
LAB #6 - GEOCITIES.ws
... ANSWER ALL PRE-LAB WARMUPS BEFORE COMING TO LAB. You will begin lab with a short quiz on these questions. This exercise will continue with the techniques used by astronomers to determine the fundamental properties of stars. In this exercise we will use these techniques to study the characteristics o ...
... ANSWER ALL PRE-LAB WARMUPS BEFORE COMING TO LAB. You will begin lab with a short quiz on these questions. This exercise will continue with the techniques used by astronomers to determine the fundamental properties of stars. In this exercise we will use these techniques to study the characteristics o ...
Word
... of our Milky Way galaxy, providing unprecedented positional measurements for about one billion stars in our galaxy - about 1% of our galaxy’s stars. This instrument will measure parallaxes as small as ~25 micro-arcseconds (25 x 10-6 arcsec = 25 as). Use the parallax equation we discussed in class t ...
... of our Milky Way galaxy, providing unprecedented positional measurements for about one billion stars in our galaxy - about 1% of our galaxy’s stars. This instrument will measure parallaxes as small as ~25 micro-arcseconds (25 x 10-6 arcsec = 25 as). Use the parallax equation we discussed in class t ...
Star catalogue
A star catalogue, or star catalog, is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Star catalogues were compiled by many different ancient peoples, including the Babylonians, Greeks, Chinese, Persians, and Arabs. Most modern catalogues are available in electronic format and can be freely downloaded from NASA's Astronomical Data Center.Completeness and accuracy is described by the weakest apparent magnitude V (largest number) and the accuracy of the positions.