Related Handout - Orange County Astronomers
... Mars is the last of the terrestrial planets. Its diameter is 4,116 miles, its mass 11% of Earth’s, and it circles the Sun in 1.88 years at an average distance of 1.5 AU. The planet is cratered, has a thin atmosphere of carbon dioxide, and has two small moons, Deimos and Phobos, beyond the reach of t ...
... Mars is the last of the terrestrial planets. Its diameter is 4,116 miles, its mass 11% of Earth’s, and it circles the Sun in 1.88 years at an average distance of 1.5 AU. The planet is cratered, has a thin atmosphere of carbon dioxide, and has two small moons, Deimos and Phobos, beyond the reach of t ...
Stars are made of very hot gas. This gas is mostly hydrogen and
... Blue giant stars die in a spectacular way They grow larger just like the Sun sized stars, but then instead of shrinking and forming a planetary nebula they explode in what is called a super nova. Super nova explosions can be brighter than an entire galaxy, and can be seen from very far away ...
... Blue giant stars die in a spectacular way They grow larger just like the Sun sized stars, but then instead of shrinking and forming a planetary nebula they explode in what is called a super nova. Super nova explosions can be brighter than an entire galaxy, and can be seen from very far away ...
2009_ASU_Exam
... magnitude as observed from earth. If an observer were able to move 10 pcs closer to both stars, which star will appear brighter from the new observation point? 14) Star P is a pulsating variable star. As it pulses, the apparent magnitude of Star P changes by 5 magnitudes. Assuming that its temperatu ...
... magnitude as observed from earth. If an observer were able to move 10 pcs closer to both stars, which star will appear brighter from the new observation point? 14) Star P is a pulsating variable star. As it pulses, the apparent magnitude of Star P changes by 5 magnitudes. Assuming that its temperatu ...
Lecture 33: The Lives of Stars Astronomy 141
... This lecture concerns the life cycle of normal stars. Stars shine because they are hot, and need a source of energy to keep shining. Main Sequence stars are powered by the fusion of Hydrogen into Helium in their cores The more massive a star is, the shorter its lifetime. Low-Mass stars are long-live ...
... This lecture concerns the life cycle of normal stars. Stars shine because they are hot, and need a source of energy to keep shining. Main Sequence stars are powered by the fusion of Hydrogen into Helium in their cores The more massive a star is, the shorter its lifetime. Low-Mass stars are long-live ...
Surveying the Stars
... • Just about anything you want to find out about a star, you can find out if it’s in an eclipsing binary system (well, maybe a slight exaggeration, but not much) ...
... • Just about anything you want to find out about a star, you can find out if it’s in an eclipsing binary system (well, maybe a slight exaggeration, but not much) ...
Why is there a main sequence?
... Mmax ~ 100 solar masses a) More massive clouds fragment into smaller pieces during star formation ...
... Mmax ~ 100 solar masses a) More massive clouds fragment into smaller pieces during star formation ...
9 Measuring the properties of stars - Journigan-wiki
... It offers a simple, pictorial summary of stellar properties. Most stars lie on the main sequence with the hotter stars being more luminous. Blue stars are hottest while red stars are the coolest A star’s mass determines its location along the main sequence with more massive stars located at the top. ...
... It offers a simple, pictorial summary of stellar properties. Most stars lie on the main sequence with the hotter stars being more luminous. Blue stars are hottest while red stars are the coolest A star’s mass determines its location along the main sequence with more massive stars located at the top. ...
View poster
... The solution is to start considering the Moon. Therefore the dynamic range of the star sensor had to include the brighter stars in our galaxy and the very bright Moon. Ranges from magnitudes 1 to -13 need to be covered. In the lab we have shown that the dynamic range of the star sensor can include t ...
... The solution is to start considering the Moon. Therefore the dynamic range of the star sensor had to include the brighter stars in our galaxy and the very bright Moon. Ranges from magnitudes 1 to -13 need to be covered. In the lab we have shown that the dynamic range of the star sensor can include t ...
Life on the Main Sequence + Expansion to Red Giant
... is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer four essential questions: • Why is there a main sequence of stellar luminosities and surface temperatures? • Why is there a simple relationship between the m ...
... is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer four essential questions: • Why is there a main sequence of stellar luminosities and surface temperatures? • Why is there a simple relationship between the m ...
Exercise 4
... radiation curve. On the curve, there is a peak which shifts to shorter wavelength when the temperature of the blackbody increases. From the position of the peak, astronomers can deduce the surface temperature of the star. In general, the spectra of hot stars peak at shorter wavelengths and therefore ...
... radiation curve. On the curve, there is a peak which shifts to shorter wavelength when the temperature of the blackbody increases. From the position of the peak, astronomers can deduce the surface temperature of the star. In general, the spectra of hot stars peak at shorter wavelengths and therefore ...
SPA 302: THE EVOLUTION OF STARS LECTURE 1: BASICS OF
... stars emit at the IR and we do not see them at all. Hotter objects emit more energy at ALL wavelengths due to higher average energy of ALL photons. ...
... stars emit at the IR and we do not see them at all. Hotter objects emit more energy at ALL wavelengths due to higher average energy of ALL photons. ...
Lecture 12
... H-R diagram from Hipparcos measurements An H-R diagram for the 5000 stars with the best distance determinations from Hipparcos: `Observational’ axes: color and absolute magnitude Colors indicate the density of stars in that part of the diagram Most important point: most of the possible combinations ...
... H-R diagram from Hipparcos measurements An H-R diagram for the 5000 stars with the best distance determinations from Hipparcos: `Observational’ axes: color and absolute magnitude Colors indicate the density of stars in that part of the diagram Most important point: most of the possible combinations ...
9J Gravity and Space
... system was set up more than two thousand years ago, the sun's path was divided into twelve equally spaced "signs," each 30 degrees wide. ...
... system was set up more than two thousand years ago, the sun's path was divided into twelve equally spaced "signs," each 30 degrees wide. ...
Which Constellation is Which?
... When you look up at the sky, you may see shapes. Ancient stargazers created these shapes. They are the constellations. They are named after people, animals, and things that were important to them You can use a star chart that shows where stars appear in the sky. As the night passes, these shapes see ...
... When you look up at the sky, you may see shapes. Ancient stargazers created these shapes. They are the constellations. They are named after people, animals, and things that were important to them You can use a star chart that shows where stars appear in the sky. As the night passes, these shapes see ...
giant molecular clouds
... Large masses of Giant Molecular Clouds => Stars do not form isolated, but in large groups, called Open Clusters of Stars. ...
... Large masses of Giant Molecular Clouds => Stars do not form isolated, but in large groups, called Open Clusters of Stars. ...
Lecture Ten - The Sun Amongst the Stars Part II
... O-type stars have very few lines because they are so hot that most of their elements have been stripped of electrons – while in cooler, M-type stars, far more atoms retain their electrons. Patterns of absorption lines can reveal the temperatures of the stars to a precision within 50 degrees K – a f ...
... O-type stars have very few lines because they are so hot that most of their elements have been stripped of electrons – while in cooler, M-type stars, far more atoms retain their electrons. Patterns of absorption lines can reveal the temperatures of the stars to a precision within 50 degrees K – a f ...
Stars, Galaxies & Universe
... A. Satellite telescopes are much closer to the stars. B. Satellite telescopes are able to see through solid objects. C. Satellite telescopes can detect wavelengths that are blocked by the atmosphere. D. Satellite telescopes have the ability to see the future. ...
... A. Satellite telescopes are much closer to the stars. B. Satellite telescopes are able to see through solid objects. C. Satellite telescopes can detect wavelengths that are blocked by the atmosphere. D. Satellite telescopes have the ability to see the future. ...
Chapter 12 Stellar Evolution
... Which of the following are old stars with no current nuclear reactions? A. red giants B. main sequence stars C. white dwarfs D. proto stars ...
... Which of the following are old stars with no current nuclear reactions? A. red giants B. main sequence stars C. white dwarfs D. proto stars ...
answer key
... which makes them burn off (or rather “fuse off”) their fuel faster, which makes them die sooner/younger! ...
... which makes them burn off (or rather “fuse off”) their fuel faster, which makes them die sooner/younger! ...
magnitude handout
... How do we use this table? The magnitude difference between two stars along with Table 2 gives us the brightness ratio, how many times brighter the star is. We can also work the other way. Thus if star A is 40 times brighter than star B, the table tells us that A is 4 magnitudes brighter. It is prett ...
... How do we use this table? The magnitude difference between two stars along with Table 2 gives us the brightness ratio, how many times brighter the star is. We can also work the other way. Thus if star A is 40 times brighter than star B, the table tells us that A is 4 magnitudes brighter. It is prett ...
Phys 100 – Astronomy (Dr. Ilias Fernini) Review Questions for
... 31. The region of the sun just below the photosphere a. is undergoing thermonuclear fusion using the proton-proton chain. b. is undergoing thermonuclear fusion using the CNO cycle. * c. is transporting energy to the photosphere by convection. d. is not in hydrostatic equilibrium. e. a and c above 32 ...
... 31. The region of the sun just below the photosphere a. is undergoing thermonuclear fusion using the proton-proton chain. b. is undergoing thermonuclear fusion using the CNO cycle. * c. is transporting energy to the photosphere by convection. d. is not in hydrostatic equilibrium. e. a and c above 32 ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.