Astronomy 114 Problem Set # 7 Due: 30 Apr 2007 SOLUTIONS 1
... gravitational pull at some radius R is induced by the mass within R, we denote it M(R). For the centrifugal force, we have ...
... gravitational pull at some radius R is induced by the mass within R, we denote it M(R). For the centrifugal force, we have ...
AST101 Lecture 13 The Lives of the Stars
... Stars evolve up and to left in MS (but not much) Solar luminosity has increased by 30% in 4.6 Gyr ...
... Stars evolve up and to left in MS (but not much) Solar luminosity has increased by 30% in 4.6 Gyr ...
Week8Lecture1
... Black Hole at the GC? These stars are very close to the galactic center. The orbit on the right is the best fit; it assumes a central black hole of 3.7 ...
... Black Hole at the GC? These stars are very close to the galactic center. The orbit on the right is the best fit; it assumes a central black hole of 3.7 ...
Introduction to the HR Diagram
... located in the upper right-hand corner of the H-R diagram. As the central core of a main sequence star with a mass from ~0.8 to 8 solar masses runs out of hydrogen, radiation pressure no longer balances gravity and the star begins to collapse. There is still hydrogen in the outer layers surrounding ...
... located in the upper right-hand corner of the H-R diagram. As the central core of a main sequence star with a mass from ~0.8 to 8 solar masses runs out of hydrogen, radiation pressure no longer balances gravity and the star begins to collapse. There is still hydrogen in the outer layers surrounding ...
The “Life” of Non-living Stars - Etiwanda E
... Hydrogen continues to fuse into helium Size of star changes very little during this stage ...
... Hydrogen continues to fuse into helium Size of star changes very little during this stage ...
at A-stars?
... • Pleiades: an “open cluster” of stars about 100 million years old • Compare with Sun’s age of about 4.6 BILLION years old ...
... • Pleiades: an “open cluster” of stars about 100 million years old • Compare with Sun’s age of about 4.6 BILLION years old ...
Astronomical Distances
... 6. Which is a better unit of distance when discussing objects outside of our solar system, an astronomical unit or light-year? 7. A person with perfect eyesight and with perfect conditions we can see about 3000 stars at once with the unaided eye, the farthest star we can see with the unaided eye is ...
... 6. Which is a better unit of distance when discussing objects outside of our solar system, an astronomical unit or light-year? 7. A person with perfect eyesight and with perfect conditions we can see about 3000 stars at once with the unaided eye, the farthest star we can see with the unaided eye is ...
The Universe
... The surfaces (photospheres) of relatively cool red stars are still a toasty 3000 K or so. ...
... The surfaces (photospheres) of relatively cool red stars are still a toasty 3000 K or so. ...
Student Worksheet - Indiana University Astronomy
... of the constellation Ophiuchus. Its age is estimated from the main sequence stars in the cluster to be between about 30-100 million years, and its distance is about 352 parsecs (1150 light ...
... of the constellation Ophiuchus. Its age is estimated from the main sequence stars in the cluster to be between about 30-100 million years, and its distance is about 352 parsecs (1150 light ...
Chapter 5 Notes
... 1. Earth galaxy is Milky Way which is part of a galaxy cluster named the ______ _____. 2. _______ _______ - spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar 3. _______ _________ - large, three-dimensional ellipses; most common type ...
... 1. Earth galaxy is Milky Way which is part of a galaxy cluster named the ______ _____. 2. _______ _______ - spiral arms wind out from inner section; some have barred spirals with stars and gas in a central bar 3. _______ _________ - large, three-dimensional ellipses; most common type ...
Star Formation: Interstellar Gas and Dust
... 150 M 4 million L Highly variable in luminosity. This material ejected in 1843. • Major brightening recorded. • Ejected 3 M • 2nd brightest star in sky at that time. Brightness Î ...
... 150 M 4 million L Highly variable in luminosity. This material ejected in 1843. • Major brightening recorded. • Ejected 3 M • 2nd brightest star in sky at that time. Brightness Î ...
Planet Found In Nearest Star System To Earth
... Alpha Centauri B is very similar to the Sun but slightly smaller and less bright. The newly discovered planet, with a mass of a little more than that of Earth [3], is orbiting about six million kilometres away from the star, much closer than Mercury is to the Sun in the Solar System. The orbit of th ...
... Alpha Centauri B is very similar to the Sun but slightly smaller and less bright. The newly discovered planet, with a mass of a little more than that of Earth [3], is orbiting about six million kilometres away from the star, much closer than Mercury is to the Sun in the Solar System. The orbit of th ...
Star Classification - University of Louisville
... surface temperatures are much higher, and shine white instead of red. When the Sun comes to the end of its life, it will become a White Dwarf. It will be much smaller than it is now, not quite as bright but twice as hot. Its matter (particles) will be more densely-packed together. ...
... surface temperatures are much higher, and shine white instead of red. When the Sun comes to the end of its life, it will become a White Dwarf. It will be much smaller than it is now, not quite as bright but twice as hot. Its matter (particles) will be more densely-packed together. ...
Astronomy Assignment #1
... 1. What fundamental property of stars determines their evolution? Mass is the fundamental property that determines the evolution of stars. The mass of a star determines the central pressure of the star which in turn is the leading term in establishing the luminosity of the star which in turn determi ...
... 1. What fundamental property of stars determines their evolution? Mass is the fundamental property that determines the evolution of stars. The mass of a star determines the central pressure of the star which in turn is the leading term in establishing the luminosity of the star which in turn determi ...
Stellar Evolution
... Stage 11: Back to the giant branch Helium in the core fuses to carbon Core becomes hotter and hotter Helium burns faster and faster Star is now similar to its condition just as it left the Main Sequence, ...
... Stage 11: Back to the giant branch Helium in the core fuses to carbon Core becomes hotter and hotter Helium burns faster and faster Star is now similar to its condition just as it left the Main Sequence, ...
Stars on the HR Diagram
... 1. Plot the Absolute Magnitude (luminosity/intrinsic brightness) versus Temperature (measured in degrees Kelvin) of stars on the Chart for H-R Diagram (page 3) using data from the Table of Star Data (page 2). 2. Use one colored pencil to plot the nearest stars, 15 light years from the sun or closer, ...
... 1. Plot the Absolute Magnitude (luminosity/intrinsic brightness) versus Temperature (measured in degrees Kelvin) of stars on the Chart for H-R Diagram (page 3) using data from the Table of Star Data (page 2). 2. Use one colored pencil to plot the nearest stars, 15 light years from the sun or closer, ...
PRE-LAB
... Well, you could specify the position of a star in terms of ALTITUDE and AZIMUTH. However, this is messy because ALTITUDE and AZIMUTH change throughout the night. Also, they depend on your position , (i.e., your HORIZON and your latitude) on the EARTH. Clearly, we need a better method to describe the ...
... Well, you could specify the position of a star in terms of ALTITUDE and AZIMUTH. However, this is messy because ALTITUDE and AZIMUTH change throughout the night. Also, they depend on your position , (i.e., your HORIZON and your latitude) on the EARTH. Clearly, we need a better method to describe the ...
ASTRO 1050 The Structure of the Milky Way Galaxy
... halo, a larger cloud of stars that surround the entire Galaxy. The halo is much larger than the bulge. Our Milky Way Galaxy is made up of mostly stars, gas and dust. The dust blocks out light from distant stars, and makes it difficult to see most of the Galaxy, especially the bulge and parts of the ...
... halo, a larger cloud of stars that surround the entire Galaxy. The halo is much larger than the bulge. Our Milky Way Galaxy is made up of mostly stars, gas and dust. The dust blocks out light from distant stars, and makes it difficult to see most of the Galaxy, especially the bulge and parts of the ...
Chapter 12: Measuring the Properties of Stars
... defined as the apparent magnitude a star would have if it were at a distance of 10 parsecs. Tools of Astronomy: Calculating Absolute Magnitude 1. The difference between a star’s apparent (m) and absolute (M) magnitudes is called the distance modulus: m M = 5 log(d) 5, where d is the star’s dis ...
... defined as the apparent magnitude a star would have if it were at a distance of 10 parsecs. Tools of Astronomy: Calculating Absolute Magnitude 1. The difference between a star’s apparent (m) and absolute (M) magnitudes is called the distance modulus: m M = 5 log(d) 5, where d is the star’s dis ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.