Astronomy Exam #2 for the 10
... sequence lifetime compared to the Sun’s lifetime. Some as short as a few million years. The giant stars appear to be mostly G and K spectral types with luminosities over 100 solar luminosities. These giant stars are at the end of their evolution and will shortly perish. Although it appears on this H ...
... sequence lifetime compared to the Sun’s lifetime. Some as short as a few million years. The giant stars appear to be mostly G and K spectral types with luminosities over 100 solar luminosities. These giant stars are at the end of their evolution and will shortly perish. Although it appears on this H ...
The Magnitude System
... It turns out that our eyes read out light signals logarithmically (this means that brightness and magnitudes have some type of logarithmic relation). The relationship was originally determined empirically and now it is used as a definition. It was found that a difference in 5 magnitudes corresponds ...
... It turns out that our eyes read out light signals logarithmically (this means that brightness and magnitudes have some type of logarithmic relation). The relationship was originally determined empirically and now it is used as a definition. It was found that a difference in 5 magnitudes corresponds ...
HR Diagram Lab Handout
... 7. The temperature of the hottest stars is _______________. 8. The color of the hottest stars is ________________. 9. The temperature of the coldest stars is _______________. 10. The color of the coldest stars is ________________. 11. The life expectancy of a very hot star is _______________ years. ...
... 7. The temperature of the hottest stars is _______________. 8. The color of the hottest stars is ________________. 9. The temperature of the coldest stars is _______________. 10. The color of the coldest stars is ________________. 11. The life expectancy of a very hot star is _______________ years. ...
star
... • Very massive stars can explode in a supernova, which destroys the star. • Iron in the core does not fuse and the core collapses quickly under the force of gravity. • The normal space within atoms is eliminated, leaving a dense core of neutrons, or a neutron star. ...
... • Very massive stars can explode in a supernova, which destroys the star. • Iron in the core does not fuse and the core collapses quickly under the force of gravity. • The normal space within atoms is eliminated, leaving a dense core of neutrons, or a neutron star. ...
Chapter 8: Stars
... relationship between a stars’ surface temperature and its absolute magnitude. • The modern HR Diagram is shown below. ...
... relationship between a stars’ surface temperature and its absolute magnitude. • The modern HR Diagram is shown below. ...
Slide 1
... Stellar spectra are much more informative than the blackbody curves. There are seven general categories of stellar spectra, corresponding to different ...
... Stellar spectra are much more informative than the blackbody curves. There are seven general categories of stellar spectra, corresponding to different ...
What units are used in astronomical photometry?
... that m > n when fn > fm, that is: brighter objects have numerically smaller magnitudes. Also note that when the brightnesses are those observed at the Earth, physically they are fluxes. Apparent magnitude is the astronomically peculiar way of talking about fluxes. Here are a few worked examples: (a) ...
... that m > n when fn > fm, that is: brighter objects have numerically smaller magnitudes. Also note that when the brightnesses are those observed at the Earth, physically they are fluxes. Apparent magnitude is the astronomically peculiar way of talking about fluxes. Here are a few worked examples: (a) ...
SGL 9 NGC Galaxy magnitude 9/10 observing challenge Up for
... Once you have seen a few spirals face on you will find you can identify them even before you have looked them up on google! Object 3 – Leo triplet (Taki page 50) No not the famous one. Look half way between delta and theta Leo and then a fraction left. This group NGC3605 / NGC 3607 and NGC 3608 are ...
... Once you have seen a few spirals face on you will find you can identify them even before you have looked them up on google! Object 3 – Leo triplet (Taki page 50) No not the famous one. Look half way between delta and theta Leo and then a fraction left. This group NGC3605 / NGC 3607 and NGC 3608 are ...
Exam2 Review Slides
... In the previous unit, we saw that stars have different temperatures, and that a star’s luminosity depends on its temperature and diameter The Hertzsprung-Russell diagram lets us look for trends in this relationship. ...
... In the previous unit, we saw that stars have different temperatures, and that a star’s luminosity depends on its temperature and diameter The Hertzsprung-Russell diagram lets us look for trends in this relationship. ...
Can you write numbers in scientific notation
... This review sheet serves as a reminder of the material covered in the lectures. It should be noted that some items from lecture may not be included on this review sheet, but will still be referenced on the exam. As such, use these questions as a reminder of the material that was covered in the lectu ...
... This review sheet serves as a reminder of the material covered in the lectures. It should be noted that some items from lecture may not be included on this review sheet, but will still be referenced on the exam. As such, use these questions as a reminder of the material that was covered in the lectu ...
ppt document
... brightness that varies by up to about half a magnitude with a period that ranges from 1 to 100 days. By looking at star clusters where all of its stars appear to be about the same distance away, we find that the period of the star is related to the luminosity of the star! The lower the period, the l ...
... brightness that varies by up to about half a magnitude with a period that ranges from 1 to 100 days. By looking at star clusters where all of its stars appear to be about the same distance away, we find that the period of the star is related to the luminosity of the star! The lower the period, the l ...
Astrophysics Presentation
... -- so if it looks dim it must be a very long way away A red star is not as bright, so if it looks bright it must be relatively close. For example: Sirius and Alpha Centauri are similar in apparent brightness but Sirius is bluish while A.Cent. is yellowish ...
... -- so if it looks dim it must be a very long way away A red star is not as bright, so if it looks bright it must be relatively close. For example: Sirius and Alpha Centauri are similar in apparent brightness but Sirius is bluish while A.Cent. is yellowish ...
Measuring Distance with Spectroscopic Parallax
... 1. Print out the HR diagram. 2. Using a pen or pencil, draw a smooth best-fit curve that runs through the middle of all of your main sequence stars. Just ignore the red giants and white dwarfs for this activity. Note that this will not be a straight line; it will curve slightly. And, it will not go ...
... 1. Print out the HR diagram. 2. Using a pen or pencil, draw a smooth best-fit curve that runs through the middle of all of your main sequence stars. Just ignore the red giants and white dwarfs for this activity. Note that this will not be a straight line; it will curve slightly. And, it will not go ...
1 Astronomical Measurements and Quantities 2 Astronomical Objects
... binaries (=eclipsing variables) and the light curve. [K], [BM]. Stars: properties: Masses of stars - mass of the Sun, mass of binary stars (visual and spectroscopic); Radii of stars - interferometry and lunar occultations (hints) - eclipsing binaries; Properties from spectra - effective temperature ...
... binaries (=eclipsing variables) and the light curve. [K], [BM]. Stars: properties: Masses of stars - mass of the Sun, mass of binary stars (visual and spectroscopic); Radii of stars - interferometry and lunar occultations (hints) - eclipsing binaries; Properties from spectra - effective temperature ...
Properties of Stars
... are similar, and cannot be simply ignored. Sirius b is a white dwarf, and its orbital period around Sirius takes 50 years.If the distance between the the stars is 20 AU, find the mass of the stars. ...
... are similar, and cannot be simply ignored. Sirius b is a white dwarf, and its orbital period around Sirius takes 50 years.If the distance between the the stars is 20 AU, find the mass of the stars. ...
The Life of Stars
... Every atom in your body was made by a star! “The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, and the carbon in our apple pies were all made in the interior of collapsing stars. We are made of ...
... Every atom in your body was made by a star! “The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, and the carbon in our apple pies were all made in the interior of collapsing stars. We are made of ...
Astronomy 200 Problem Set No
... Plot apparent magnitudes on the vertical axis with dim at the bottom and bright at the top. Plot temperature along the horizontal axis with hot to the left and cool to the right. Note that this is similar to the form of an HR diagram but until we know the distance to the Pleiades, we cannot convert ...
... Plot apparent magnitudes on the vertical axis with dim at the bottom and bright at the top. Plot temperature along the horizontal axis with hot to the left and cool to the right. Note that this is similar to the form of an HR diagram but until we know the distance to the Pleiades, we cannot convert ...
Star - Uplift Education
... Binary star is a stellar system consisting of two stars orbiting around their common center of mass. The ONLY way to find mass of the stars is when they are the part of binary stars. Knowing the period of the binary and the separation of the stars the total mass of the binary system can be calculat ...
... Binary star is a stellar system consisting of two stars orbiting around their common center of mass. The ONLY way to find mass of the stars is when they are the part of binary stars. Knowing the period of the binary and the separation of the stars the total mass of the binary system can be calculat ...
test - Scioly.org
... 65) Which ashonomical object on this year's list is described as "a spherical collection of hundreds of thousands of stars in the outer halo of the Large Magellanic Cloud that catbe seen from the southern fusmisphere." D) NGC 1846 A) SNR G1.9+0.3 E) SNR 0s09-67.s B) SS Cvgni c) NGC 2440 66) Which as ...
... 65) Which ashonomical object on this year's list is described as "a spherical collection of hundreds of thousands of stars in the outer halo of the Large Magellanic Cloud that catbe seen from the southern fusmisphere." D) NGC 1846 A) SNR G1.9+0.3 E) SNR 0s09-67.s B) SS Cvgni c) NGC 2440 66) Which as ...
Assessment Star Characteristics and Life Cycle
... Assessment Star Characteristics and Life Cycle 1. Below is a Hertzsprung-Russell Diagram that scientists use to compare stars based on their properties. ...
... Assessment Star Characteristics and Life Cycle 1. Below is a Hertzsprung-Russell Diagram that scientists use to compare stars based on their properties. ...
Reach for the Stars – Div. B
... Lagoon Nebula(catalogued as Messier 8 or M8, and as NGC 6523) is a giant interstellar cloud in theconstellation Sagittarius. It is classified as an emission nebula and as a H II region. • The Lagoon Nebula was discovered by Giovanni Hodierna before 1654 and is one of only two star-forming nebulae fa ...
... Lagoon Nebula(catalogued as Messier 8 or M8, and as NGC 6523) is a giant interstellar cloud in theconstellation Sagittarius. It is classified as an emission nebula and as a H II region. • The Lagoon Nebula was discovered by Giovanni Hodierna before 1654 and is one of only two star-forming nebulae fa ...
Stars
... because it is electron degenerate, energy created will not expand the star and shut off the fusion. • So, entire star (carbon, mostly) undergoes fusion at once. What a star normally takes billions of years to burn, this star burns all at once. BIG explosion! ...
... because it is electron degenerate, energy created will not expand the star and shut off the fusion. • So, entire star (carbon, mostly) undergoes fusion at once. What a star normally takes billions of years to burn, this star burns all at once. BIG explosion! ...
Boötes
Boötes /boʊˈoʊtiːz/ is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, Boōtēs, meaning herdsman or plowman (literally, ox-driver; from βοῦς bous “cow”). The ""ö"" in the name is a diaeresis, not an umlaut, meaning that each 'o' is to be pronounced separately.One of the 48 constellations described by the 2nd century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the fourth brightest star in the night sky, the orange-hued Arcturus. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye.