Lecture 6: Properties of Stars The Constellations The Constellations
... o Distant stars used as reference points. Closer star appears to move relative to distant stars during Earth’s orbit about Sun. o Parallax angle: p ~ 1 AU / d => d = ~ 1 AU / p ...
... o Distant stars used as reference points. Closer star appears to move relative to distant stars during Earth’s orbit about Sun. o Parallax angle: p ~ 1 AU / d => d = ~ 1 AU / p ...
Astronomy I Ex.2
... What is the (approximate) age of the universe in Gyr? 3. Convert the following distances in cm to distances in AU: a) Approximate distance from the earth to the sun: 1.44 × 1013 cm b) Approximate distance from the earth to the next nearest star - Alpha Centauri: 3.97 × 1018 cm c) Approximate distanc ...
... What is the (approximate) age of the universe in Gyr? 3. Convert the following distances in cm to distances in AU: a) Approximate distance from the earth to the sun: 1.44 × 1013 cm b) Approximate distance from the earth to the next nearest star - Alpha Centauri: 3.97 × 1018 cm c) Approximate distanc ...
Document
... g. Which star is the closest (find m-M)? h. Which star has the smallest parallax angle? i. ...
... g. Which star is the closest (find m-M)? h. Which star has the smallest parallax angle? i. ...
stars concept review
... b. Carbon fuses into hydrogen. c. Helium fuses into hydrogen. d. Carbon fuses into oxygen. _____ 8. How long would a star with the sun’s mass stay on the main sequence? a. a million years c. 10 trillion years b. a billion years d. 10 billion years _____ 9. After a protostar’s temperature rises to 10 ...
... b. Carbon fuses into hydrogen. c. Helium fuses into hydrogen. d. Carbon fuses into oxygen. _____ 8. How long would a star with the sun’s mass stay on the main sequence? a. a million years c. 10 trillion years b. a billion years d. 10 billion years _____ 9. After a protostar’s temperature rises to 10 ...
Morning Announcements
... Part 2: Stellar Sizes: Once we know a star’s temperature and its total luminosity we can also deduce its size. The reason is that there is a connection between temperature and total energy output, which is described by the Stefan-Boltzmann law. There are two important aspects to remember: • The tota ...
... Part 2: Stellar Sizes: Once we know a star’s temperature and its total luminosity we can also deduce its size. The reason is that there is a connection between temperature and total energy output, which is described by the Stefan-Boltzmann law. There are two important aspects to remember: • The tota ...
100 X size of Sun - East Penn School District
... • In the magnitude scale, lower numbers are associated with brighter stars. • Star A has an apparent magnitude = 5.4 and star B has an apparent magnitude = 2.4. Which star is brighter? • We can't actually move stars around, but we can calculate how bright a star would be if placed at the agreed-upon ...
... • In the magnitude scale, lower numbers are associated with brighter stars. • Star A has an apparent magnitude = 5.4 and star B has an apparent magnitude = 2.4. Which star is brighter? • We can't actually move stars around, but we can calculate how bright a star would be if placed at the agreed-upon ...
HS-ESS1-2 - Trimble County Schools
... A. What are Binary Stars? 1) How do most of them appear from Earth? 2) How are Astonomers able to identify them? B. What are Doppler Shifts? 1) Compare/Contrast blueshift and redshift. 2) How does speed affect it? C. What are two units of measure for long stellar distances? D Describe the apparent s ...
... A. What are Binary Stars? 1) How do most of them appear from Earth? 2) How are Astonomers able to identify them? B. What are Doppler Shifts? 1) Compare/Contrast blueshift and redshift. 2) How does speed affect it? C. What are two units of measure for long stellar distances? D Describe the apparent s ...
The Family of Stars
... but Sirius B is a white dwarf star, with a radius ~ 560 times smaller than Spica B. ...
... but Sirius B is a white dwarf star, with a radius ~ 560 times smaller than Spica B. ...
September Evening Skies
... objects of first magnitude or brighter are visible. In order of brightness they are: Arcturus, Vega, Capella, Altair, Antares, Fomalhaut, and Deneb. Our usual monthly maps are designed for stargazers just beginning to find their way around the sky. This month’s map is useful for serious stargazing f ...
... objects of first magnitude or brighter are visible. In order of brightness they are: Arcturus, Vega, Capella, Altair, Antares, Fomalhaut, and Deneb. Our usual monthly maps are designed for stargazers just beginning to find their way around the sky. This month’s map is useful for serious stargazing f ...
Astronomy 242: Review Questions #1 Distributed: February 10
... 12. You observe a sample of Cepheid variable stars in a nearby galaxy. Plotting the average apparent K-band magnitude of each one against the period of pulsation yields Fig. 3. The straight line, a least-squares fit to the data, has the equation mK = 16.40 − 3.53 log(P/day). (a) Does it seem reasona ...
... 12. You observe a sample of Cepheid variable stars in a nearby galaxy. Plotting the average apparent K-band magnitude of each one against the period of pulsation yields Fig. 3. The straight line, a least-squares fit to the data, has the equation mK = 16.40 − 3.53 log(P/day). (a) Does it seem reasona ...
Stars - Quia
... the closest - so it should appear the brightest - BUT - it’s just average in reality ...
... the closest - so it should appear the brightest - BUT - it’s just average in reality ...
Characteristics of Stars
... This is 9.5 trillion km in 1 year Proxima Centauri is 4.2 ly away or 39,900,000,000,000 km or 24.8 trillion miles The circumference of the Earth is ~25,000 miles ...
... This is 9.5 trillion km in 1 year Proxima Centauri is 4.2 ly away or 39,900,000,000,000 km or 24.8 trillion miles The circumference of the Earth is ~25,000 miles ...
AST 207 Test 2 Answers 20 October 2010
... star A. Prof. Adams says he discovered a new type of star that is fainter than white dwarfs. Has he discovered a new type of star? Explain. The clues are very much like Walter Adams’ discovery that Sirius B is a white dwarf. However, there is a crucial missing clue. Since Sirius A and B were known t ...
... star A. Prof. Adams says he discovered a new type of star that is fainter than white dwarfs. Has he discovered a new type of star? Explain. The clues are very much like Walter Adams’ discovery that Sirius B is a white dwarf. However, there is a crucial missing clue. Since Sirius A and B were known t ...
Measuring the Stars pages 813-820
... the constellation that is just starting to become apparent, over the horizon, when the sun disappears, and darkness closes on the Earth. ...
... the constellation that is just starting to become apparent, over the horizon, when the sun disappears, and darkness closes on the Earth. ...
Making H-R Diagrams - PLC-METS
... see them the same. The apparent magnitude of a star is the amount of light received on Earth or the brightness of the star as seen from Earth. This is different than the absolute magnitude because the absolute magnitude is based upon the amount of light the star gives off. This difference is the rea ...
... see them the same. The apparent magnitude of a star is the amount of light received on Earth or the brightness of the star as seen from Earth. This is different than the absolute magnitude because the absolute magnitude is based upon the amount of light the star gives off. This difference is the rea ...
The Magnitude Scale
... from a given source (energy per unit area per unit time per unit bandwidth), then the apparent magnitude of the object is defined by Fν m = −2.5 log10 0 Fν where Fν is the flux per unit frequency received from the source, and F ν0 is a normalising constant. The normalising constants have been calibr ...
... from a given source (energy per unit area per unit time per unit bandwidth), then the apparent magnitude of the object is defined by Fν m = −2.5 log10 0 Fν where Fν is the flux per unit frequency received from the source, and F ν0 is a normalising constant. The normalising constants have been calibr ...
Properties of Stars and H
... There are 2 ways to measure brightness: • Apparent magnitude – when we use size, temperature, and distance to earth to calculate brightness. This is not a true measure because ...
... There are 2 ways to measure brightness: • Apparent magnitude – when we use size, temperature, and distance to earth to calculate brightness. This is not a true measure because ...
Space Science Distance Definitions
... means of measuring the luminosity of a star should find the same value. However, apparent brightness is not an intrinsic property of the star; it depends on your location. • Why do light sources appear fainter as a function of distance? The reason is that as light travels towards you, it is spreadin ...
... means of measuring the luminosity of a star should find the same value. However, apparent brightness is not an intrinsic property of the star; it depends on your location. • Why do light sources appear fainter as a function of distance? The reason is that as light travels towards you, it is spreadin ...
HW 5 Solutions What are “black smokers?” Where in our solar
... Figure 11.10: NGC 4414 is a spiral galaxy, with no bar, and numerous arms. Sc Figure 11.11: NGC 1300 is a spiral galaxy, barred, and with two distinct arms. SBb Figure 11.12: M87 is an elliptical galaxy that is almost entirely spherical. E0. 4. How did Edwin Hubble use Cepheid variables to determine ...
... Figure 11.10: NGC 4414 is a spiral galaxy, with no bar, and numerous arms. Sc Figure 11.11: NGC 1300 is a spiral galaxy, barred, and with two distinct arms. SBb Figure 11.12: M87 is an elliptical galaxy that is almost entirely spherical. E0. 4. How did Edwin Hubble use Cepheid variables to determine ...
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.