The Magnitude Scale
... are not "exact", in that celestial objects are often measured to a precision or 0.1 or 0.01 magnitude; for example, Sirius shines at V = -1.47 (Yale Bright Star Catalogue), and the planet Venus varies in brightness generally from magnitude -4.5 to -3.7. Note that a comet of magnitude 5 will not be a ...
... are not "exact", in that celestial objects are often measured to a precision or 0.1 or 0.01 magnitude; for example, Sirius shines at V = -1.47 (Yale Bright Star Catalogue), and the planet Venus varies in brightness generally from magnitude -4.5 to -3.7. Note that a comet of magnitude 5 will not be a ...
s*t*a*r chart - Ontario Science Centre
... shifts the entire sky. This is the same motion that swings the Sun on its daily eastto-west trek. The rotational hub is Polaris, the North Star, located almost exactly above the Earth’s North Pole. Everything majestically marches counter-clockwise around it, a motion that becomes evident after about ...
... shifts the entire sky. This is the same motion that swings the Sun on its daily eastto-west trek. The rotational hub is Polaris, the North Star, located almost exactly above the Earth’s North Pole. Everything majestically marches counter-clockwise around it, a motion that becomes evident after about ...
Lecture 11 - Stars and Atomic Spectra
... plotting absolute magnitude versus spectral type • Now, it’s better to think of the HR diagram in terms of physical quantities: luminosity and surface temperature ...
... plotting absolute magnitude versus spectral type • Now, it’s better to think of the HR diagram in terms of physical quantities: luminosity and surface temperature ...
PPT - McMaster Physics and Astronomy
... • At top end – stars are hot and large: blue supergiants • At bottom end – stars are cool and small: red dwarfs • O and B stars extremely rare: one in 10,000 Stars spend most of their life on main-sequence burning hydrogen ...
... • At top end – stars are hot and large: blue supergiants • At bottom end – stars are cool and small: red dwarfs • O and B stars extremely rare: one in 10,000 Stars spend most of their life on main-sequence burning hydrogen ...
HW9_Answers
... cool to a certain temperature. There are no white dwarf stars cooler than about spectral type K. This is because there hasn’t been enough time for them to cool any further since the start of the universe. Knowing the cooling rate, and the cutoff in temperature for the white dwarfs, gives an age for ...
... cool to a certain temperature. There are no white dwarf stars cooler than about spectral type K. This is because there hasn’t been enough time for them to cool any further since the start of the universe. Knowing the cooling rate, and the cutoff in temperature for the white dwarfs, gives an age for ...
HW #9 Answers (Due 10/28)
... cool to a certain temperature. There are no white dwarf stars cooler than about spectral type K. This is because there hasn’t been enough time for them to cool any further since the start of the universe. Knowing the cooling rate, and the cutoff in temperature for the white dwarfs, gives an age for ...
... cool to a certain temperature. There are no white dwarf stars cooler than about spectral type K. This is because there hasn’t been enough time for them to cool any further since the start of the universe. Knowing the cooling rate, and the cutoff in temperature for the white dwarfs, gives an age for ...
1. Which of the following statements is incorrect concerning sidereal
... A. The celestial spheres do not have just one common centre. B. The motions of the Sun are not its motions, but the motion of Earth. C. The Earth follow an elliptical orbit in its revolution around the Sun D. What appears to us as retrograde and forward motion of the planets is not their own, but th ...
... A. The celestial spheres do not have just one common centre. B. The motions of the Sun are not its motions, but the motion of Earth. C. The Earth follow an elliptical orbit in its revolution around the Sun D. What appears to us as retrograde and forward motion of the planets is not their own, but th ...
Reach for the Stars B
... 4. What will eventually cause the dust and gas in this DSO to dissipate? 5. Which DSO, a very bright radio source, is depicted in Image [3]? 6. Why might this DSO not have been visible in the past? 7. Which DSO, a massive star-forming region, is depicted in Image [4]? 8. [T10] What is the common nic ...
... 4. What will eventually cause the dust and gas in this DSO to dissipate? 5. Which DSO, a very bright radio source, is depicted in Image [3]? 6. Why might this DSO not have been visible in the past? 7. Which DSO, a massive star-forming region, is depicted in Image [4]? 8. [T10] What is the common nic ...
Star Formation - University of Redlands
... a. it is hot and things that are hot glow red. b. it is ionized hydrogen which appears red because the brightest emission line is red. c. it is cold and things that are cold appear red. d. it is full of red stars. e. dust between the observer and the region blocks the blue light, but lets the red li ...
... a. it is hot and things that are hot glow red. b. it is ionized hydrogen which appears red because the brightest emission line is red. c. it is cold and things that are cold appear red. d. it is full of red stars. e. dust between the observer and the region blocks the blue light, but lets the red li ...
Stellar Evolution - Academic Computer Center
... depends on their mass. The H-R diagram showing the • Almost the entire lifetime Main Sequence line (in purple). of a star is spent on the More massive stars are to the upper left, Main Sequence. less massive stars to the lower right. ...
... depends on their mass. The H-R diagram showing the • Almost the entire lifetime Main Sequence line (in purple). of a star is spent on the More massive stars are to the upper left, Main Sequence. less massive stars to the lower right. ...
Notes - Michigan State University
... Little Ghost Nebula distance 2-5 kLy blue: OIII green: HII red: NII ...
... Little Ghost Nebula distance 2-5 kLy blue: OIII green: HII red: NII ...
Page 1 of 4 KEY PSCI 1055 Test #4 (Form A) KEY Spring 2008
... a. Our Sun is considered to be a class G star. What is the expected temperature range of the Sun? Class G stars are about 5000 K – 6000 K b. What type of star has the lowest temperature but the highest level of brightness on the H-R diagram? giants/supergiants c. A particular star has an absolute ma ...
... a. Our Sun is considered to be a class G star. What is the expected temperature range of the Sun? Class G stars are about 5000 K – 6000 K b. What type of star has the lowest temperature but the highest level of brightness on the H-R diagram? giants/supergiants c. A particular star has an absolute ma ...
Project Packet - Montville.net
... Constellations, especially signs of the Zodiac, have influenced human culture and folklore since the time of the Babylonians, although most of the constellations we know today are of Greek and Roman names. Most people have looked up their horoscope once or twice to see what the stars say their day i ...
... Constellations, especially signs of the Zodiac, have influenced human culture and folklore since the time of the Babylonians, although most of the constellations we know today are of Greek and Roman names. Most people have looked up their horoscope once or twice to see what the stars say their day i ...
Star Fromation and ISM
... The Formation of Stars Like the Sun At stage 6, the core reaches 10 million K, and nuclear fusion begins. The protostar has become a star. The star continues to contract and increase in temperature, until it is in equilibrium. This is stage 7: the star has reached the main sequence and will remain ...
... The Formation of Stars Like the Sun At stage 6, the core reaches 10 million K, and nuclear fusion begins. The protostar has become a star. The star continues to contract and increase in temperature, until it is in equilibrium. This is stage 7: the star has reached the main sequence and will remain ...
Phys133 SAMPLE questions for MidTerm#1
... 25) How did Eratosthenes estimate the size of the earth in 240 B.C.? A) by measuring the size of the earth's shadow on the Moon in a lunar eclipse B) by observing the duration of a solar eclipse C) by sending fleets of ships around the earth D) by comparing the maximum altitude of the Sun in two cit ...
... 25) How did Eratosthenes estimate the size of the earth in 240 B.C.? A) by measuring the size of the earth's shadow on the Moon in a lunar eclipse B) by observing the duration of a solar eclipse C) by sending fleets of ships around the earth D) by comparing the maximum altitude of the Sun in two cit ...
The origin, life, and death of stars
... becoming a planetary nebula (which actually has nothing to do with planets, but we didn’t know that in the 18th century when Herschel coined the term) The core collapses to form a White Dwarf ...
... becoming a planetary nebula (which actually has nothing to do with planets, but we didn’t know that in the 18th century when Herschel coined the term) The core collapses to form a White Dwarf ...
CST Prep- 8th Grade Astronomy
... 32. What color is Mars? __________________. It is this color because it has lots of __________________ on its surface. 33. Mars has a very thin __________________. 34. Satellites (moons) and small planets have little or no atmosphere because they are too small and have insufficient ________________ ...
... 32. What color is Mars? __________________. It is this color because it has lots of __________________ on its surface. 33. Mars has a very thin __________________. 34. Satellites (moons) and small planets have little or no atmosphere because they are too small and have insufficient ________________ ...
answers2006_07_BC
... 1. On arrival on MS, star is fusing H to He in core. This stage lasts for ~90% of star’s life, which ex-6. When core He runs out, star starts fusing He plains why most stars are on MS 2. When core H exhausted, starin shell around core, becoming a giant again shrinks under gravity, heating up until H ...
... 1. On arrival on MS, star is fusing H to He in core. This stage lasts for ~90% of star’s life, which ex-6. When core He runs out, star starts fusing He plains why most stars are on MS 2. When core H exhausted, starin shell around core, becoming a giant again shrinks under gravity, heating up until H ...
Chapter 28 Stars and Their Characteristics
... • Step 3 - Fusion stops, temperature drops • Step 4 - Core contracts (gravity pulling atoms in) • Step 5 - Increased temperature (more atoms, more collisions) and density in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins again ...
... • Step 3 - Fusion stops, temperature drops • Step 4 - Core contracts (gravity pulling atoms in) • Step 5 - Increased temperature (more atoms, more collisions) and density in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins again ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.