S1-4-03 - Celestial Navigation
... Show students the northern circumpolar constellations. Note that depending on where you live, some constellations are visible all year round and some constellations are seasonal. If you live in the Northern Hemisphere, the constellations that circle around the North Star are visible all year. These ...
... Show students the northern circumpolar constellations. Note that depending on where you live, some constellations are visible all year round and some constellations are seasonal. If you live in the Northern Hemisphere, the constellations that circle around the North Star are visible all year. These ...
Extragalactic Astrophysics 1 AA 2011-2012 Prof. LA Antonelli
... LMC and SMC orbit around their common center of mass, and also orbit the Milky Way. orbit of the Clouds is slowly decaying as energy is transferred to random motions of MW stars. position and motion of the Clouds suggest that their orbit is strongly eccentric, with a period ~2Gyr, and that ~200-400 ...
... LMC and SMC orbit around their common center of mass, and also orbit the Milky Way. orbit of the Clouds is slowly decaying as energy is transferred to random motions of MW stars. position and motion of the Clouds suggest that their orbit is strongly eccentric, with a period ~2Gyr, and that ~200-400 ...
Chapter 11
... 12. According to Figure 11-5, the Protosun was cooler yet much more luminous than the Sun is now. How can this be true? a. The Protosun had more mass. b. The Protosun was much larger. c. The rate of nuclear fusion was higher inside the Protosun. d. Both a and c above. e. Both b and c above. ...
... 12. According to Figure 11-5, the Protosun was cooler yet much more luminous than the Sun is now. How can this be true? a. The Protosun had more mass. b. The Protosun was much larger. c. The rate of nuclear fusion was higher inside the Protosun. d. Both a and c above. e. Both b and c above. ...
StellarManual
... -4.8) emits more energy than Alkaid (M = -1.8). Barnard’s Star (m = 9.5) appears brighter than Wolf 359 (13.4), and Barnard’s Star (M = 13.2) emits more energy than Wolf 359 (M = 16.6). Aldebaran (m = 0.9) appears brighter than Acrux (m = 1.6), but Acrux (M = -4.0) emits more energy than Aldebaran ( ...
... -4.8) emits more energy than Alkaid (M = -1.8). Barnard’s Star (m = 9.5) appears brighter than Wolf 359 (13.4), and Barnard’s Star (M = 13.2) emits more energy than Wolf 359 (M = 16.6). Aldebaran (m = 0.9) appears brighter than Acrux (m = 1.6), but Acrux (M = -4.0) emits more energy than Aldebaran ( ...
Geoscience Astronomy Formative on Stellar Evolution and
... c. 20 parsec (20 pc) b. 65 light years d. both “b” and “c” The H-R diagram was created by a. Harvey and Russel c. Hersmeyer and Rothchild b. Hertzsprung and Russell d. Hershey and Ramseys Stars of which color have the highest surface temperature? a. red c. yellow b. orange d. blue The mass of a star ...
... c. 20 parsec (20 pc) b. 65 light years d. both “b” and “c” The H-R diagram was created by a. Harvey and Russel c. Hersmeyer and Rothchild b. Hertzsprung and Russell d. Hershey and Ramseys Stars of which color have the highest surface temperature? a. red c. yellow b. orange d. blue The mass of a star ...
Chapter 8: The Pennsylvanian Period in Alabama: Looking Up
... brighter now than it was 310 million years ago. Main sequence stars that are much cooler than the Sun are only a tenth the Sun's radius and are very dim in comparison to the Sun, while the most massive main sequence stars can be 10-50 times the Sun's radius and a million times as bright. The main se ...
... brighter now than it was 310 million years ago. Main sequence stars that are much cooler than the Sun are only a tenth the Sun's radius and are very dim in comparison to the Sun, while the most massive main sequence stars can be 10-50 times the Sun's radius and a million times as bright. The main se ...
The Pennsylvanian Period in Alabama: Looking Up Astronomy and
... main sequence lifetimes. Since the system existed 310 million years ago, it is interesting to ask where it was at that time. Although Rigel Kent's orbit is close to ours, its distance from us and its direction in the sky vary considerably over time. 310 million years ago, it was 2,900 light years a ...
... main sequence lifetimes. Since the system existed 310 million years ago, it is interesting to ask where it was at that time. Although Rigel Kent's orbit is close to ours, its distance from us and its direction in the sky vary considerably over time. 310 million years ago, it was 2,900 light years a ...
Death of Stars • Models of Star behavior can give estimates of how
... • SN1987A in the Large Magellanic Cloud. The neutrino flux from this event was seen before the visible light was observed. The star was known as Sanduleak 69-202, a blue supergiant 25 times more massive than the Sun. ...
... • SN1987A in the Large Magellanic Cloud. The neutrino flux from this event was seen before the visible light was observed. The star was known as Sanduleak 69-202, a blue supergiant 25 times more massive than the Sun. ...
epsilon Aur
... of the secondary object in the system. The last primary eclipse took place during 1982-84. The years 2009-2011 thus provide a rare opportunity to see Epsilon Aurigae in eclipse. The primary star in the system is a yellow-white supergiant, whose diameter is comparable in size with that of the Earth’s ...
... of the secondary object in the system. The last primary eclipse took place during 1982-84. The years 2009-2011 thus provide a rare opportunity to see Epsilon Aurigae in eclipse. The primary star in the system is a yellow-white supergiant, whose diameter is comparable in size with that of the Earth’s ...
Aries The Ram - Maverick`s E-portfolio
... 221 arc seconds away from the other two. It’s about 160 light years away[5]. Objects of Interest The constellation of Aries has several intriguing objects that have kept scientists busy. Aries is home to NGC 772 which is a unbarred spiral galaxy. Recently two supernovae were discovered inside the ga ...
... 221 arc seconds away from the other two. It’s about 160 light years away[5]. Objects of Interest The constellation of Aries has several intriguing objects that have kept scientists busy. Aries is home to NGC 772 which is a unbarred spiral galaxy. Recently two supernovae were discovered inside the ga ...
The Relationship Between a Star`s Brightness and its Distance
... • The next brightest group of stars were 2nd class or magnitude 2 stars, and so forth, down to magnitude 6 stars, which were just barely visible to the naked eye. • Hipparchus also estimated that the brightest (mag. 1) stars were 100 times brighter than the faintest (mag. 6) stars. http://www-gap.dc ...
... • The next brightest group of stars were 2nd class or magnitude 2 stars, and so forth, down to magnitude 6 stars, which were just barely visible to the naked eye. • Hipparchus also estimated that the brightest (mag. 1) stars were 100 times brighter than the faintest (mag. 6) stars. http://www-gap.dc ...
Stellar Magnitudes & Distances
... • The next brightest group of stars were 2nd class or magnitude 2 stars, and so forth, down to magnitude 6 stars, which were just barely visible to the naked eye. • Hipparchus also estimated that the brightest (mag. 1) stars were 100 times brighter than the faintest (mag. 6) stars. http://www-gap.dc ...
... • The next brightest group of stars were 2nd class or magnitude 2 stars, and so forth, down to magnitude 6 stars, which were just barely visible to the naked eye. • Hipparchus also estimated that the brightest (mag. 1) stars were 100 times brighter than the faintest (mag. 6) stars. http://www-gap.dc ...
Stellar Evolution Guiding Questions Stars Evolve
... • Newborn stars may form a star cluster • Stars are held together in such a cluster by gravity • Occasionally a star moving more rapidly than average will escape from such a cluster • A stellar association is a group of newborn stars that are moving apart so rapidly that their gravitational attracti ...
... • Newborn stars may form a star cluster • Stars are held together in such a cluster by gravity • Occasionally a star moving more rapidly than average will escape from such a cluster • A stellar association is a group of newborn stars that are moving apart so rapidly that their gravitational attracti ...
Unit 13―The “Fixed” Stars
... mathematical inclined to notice that 102 is the same as 100 and (10)1/2.5 = 102/5. We told you that astronomers use lots of exponents. A student of math might have guessed that when we flagged a linear range to be compared with a multiplicative range, that would involve the use of logarithms. Take t ...
... mathematical inclined to notice that 102 is the same as 100 and (10)1/2.5 = 102/5. We told you that astronomers use lots of exponents. A student of math might have guessed that when we flagged a linear range to be compared with a multiplicative range, that would involve the use of logarithms. Take t ...
Observational properties of stars
... While most of the boundaries are pretty well defined, the boundary between ideal and radiation pressure is not really correct. Radiation pressure and gas pressure can exist together, not as an option – so there isn’t a point where one replaces the other. Typically only when radiation pressure becom ...
... While most of the boundaries are pretty well defined, the boundary between ideal and radiation pressure is not really correct. Radiation pressure and gas pressure can exist together, not as an option – so there isn’t a point where one replaces the other. Typically only when radiation pressure becom ...
Astro 204: Practice Questions Some of these questions are a bit
... Sun, what fraction of its mass will be lost to energy? b. Consider a star of mass 20 times that of the Sun. Will the fraction of its mass lost to energy be larger or smaller than that of the Sun? To answer this, do a crude, order-ofmagnitude estimate of the fraction of mass lost as a function of mas ...
... Sun, what fraction of its mass will be lost to energy? b. Consider a star of mass 20 times that of the Sun. Will the fraction of its mass lost to energy be larger or smaller than that of the Sun? To answer this, do a crude, order-ofmagnitude estimate of the fraction of mass lost as a function of mas ...
Stellar Continua
... I. The Paschen Continuum • The Paschen continuum slope (B-V) is a good temperature indicator • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K ...
... I. The Paschen Continuum • The Paschen continuum slope (B-V) is a good temperature indicator • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K ...
THE HERTZSPRUNG-RUSSELL DIAGRAM
... The age of a cluster is given by the main sequence turn-off point—the highest point on the main sequence that is still populated by stars. On the left is a wellknown schematic diagram combining the HR diagrams of star clusters of different ages: NGC2362 is the youngest and M67 the oldest. The pink n ...
... The age of a cluster is given by the main sequence turn-off point—the highest point on the main sequence that is still populated by stars. On the left is a wellknown schematic diagram combining the HR diagrams of star clusters of different ages: NGC2362 is the youngest and M67 the oldest. The pink n ...
Time From the Perspective of a Particle Physicist
... What to Remember - EW • What time during the day a star rises, is overhead, and sets changes with the seasons • look up on Star Chart (right ascension is the East-West location) • Changes 2 hours/month • Only on the Equator can all stars be viewed from a single location Hawaii or northern Chile a ...
... What to Remember - EW • What time during the day a star rises, is overhead, and sets changes with the seasons • look up on Star Chart (right ascension is the East-West location) • Changes 2 hours/month • Only on the Equator can all stars be viewed from a single location Hawaii or northern Chile a ...
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.