File
... • A star enters its third stage when about 20% of the hydrogen atoms within its core have fused into helium atoms. Giant Stars • A star’s shell of gases grows cooler as it expands. As the gases in the outer shell become cooler, they begin to glow with a reddish color. These stars are known as giants ...
... • A star enters its third stage when about 20% of the hydrogen atoms within its core have fused into helium atoms. Giant Stars • A star’s shell of gases grows cooler as it expands. As the gases in the outer shell become cooler, they begin to glow with a reddish color. These stars are known as giants ...
QDSpaperFred1.tex
... between the infrared excess of space colonies and naturally occurring dust or debris. There are two approaches to this discrimination: the temperature range of the source and the age of the star. The temperature of the dust is determined by the distance from the star and the size and composition of ...
... between the infrared excess of space colonies and naturally occurring dust or debris. There are two approaches to this discrimination: the temperature range of the source and the age of the star. The temperature of the dust is determined by the distance from the star and the size and composition of ...
m02a01
... dates commonly quoted for “star signs”. In the next Activity, we will investigate why this is so. Another question may have occurred to you: when the Sun is “in” Aquarius, for example, Aquarius can’t be seen because it is up at the same time as the Sun - that is, during the day. So why would ancient ...
... dates commonly quoted for “star signs”. In the next Activity, we will investigate why this is so. Another question may have occurred to you: when the Sun is “in” Aquarius, for example, Aquarius can’t be seen because it is up at the same time as the Sun - that is, during the day. So why would ancient ...
Lecture (Powerpoint)
... the mass of the Sun, or ~80 Jupiter masses) never ``turn on'' Central temperatures never get hot enough for nuclear burning to begin in earnest Nuclear burning is what powers the star through its life Star sits around as a brown dwarf – too big and hot to be a planet, too small and cold to be a real ...
... the mass of the Sun, or ~80 Jupiter masses) never ``turn on'' Central temperatures never get hot enough for nuclear burning to begin in earnest Nuclear burning is what powers the star through its life Star sits around as a brown dwarf – too big and hot to be a planet, too small and cold to be a real ...
Stellar Evolution
... What then? • When the hydrogen in the core is almost consumed the balance between gravity pulling in and pressure pushing out is disturbed. • The structure and appearance of the star changes ...
... What then? • When the hydrogen in the core is almost consumed the balance between gravity pulling in and pressure pushing out is disturbed. • The structure and appearance of the star changes ...
question - UW Canvas
... a. The locations or coordinates on the celestial sphere where the clusters are located. b. How fast each cluster is moving relative to Earth; i.e., spectral redshifts or blueshifts. c. The value of Hubble’s constant by fitting a slope to the main sequence. d. The approximate masses of main sequence ...
... a. The locations or coordinates on the celestial sphere where the clusters are located. b. How fast each cluster is moving relative to Earth; i.e., spectral redshifts or blueshifts. c. The value of Hubble’s constant by fitting a slope to the main sequence. d. The approximate masses of main sequence ...
PowerPoint Presentation - Research in observational
... outburst (not a supernova) that loses many solar masses in a short time. • LBVs might be the most massive stars where radiation pressure is at the limit for stellar stability. • We observe these LBV nebulae around WR stars. • Sometime, they have bipolar shapes (e.g., e Car) and a binary cause is sus ...
... outburst (not a supernova) that loses many solar masses in a short time. • LBVs might be the most massive stars where radiation pressure is at the limit for stellar stability. • We observe these LBV nebulae around WR stars. • Sometime, they have bipolar shapes (e.g., e Car) and a binary cause is sus ...
Galaxy - Bama.ua.edu
... • In past, more H, He gas, fewer stars. • Galaxy collapsed from H, He gas cloud. ...
... • In past, more H, He gas, fewer stars. • Galaxy collapsed from H, He gas cloud. ...
S T A R S
... extends out to about 200AU. These are more than another asteroid belt as is between Mars and Jupiter. EKOs have a combined mass in the order of 300 times the total mass of all asteroids. They have a very diverse range of colours, surfaces, sizes, surface activities and some possess satellites and at ...
... extends out to about 200AU. These are more than another asteroid belt as is between Mars and Jupiter. EKOs have a combined mass in the order of 300 times the total mass of all asteroids. They have a very diverse range of colours, surfaces, sizes, surface activities and some possess satellites and at ...
Math 111: Logarithm Scales
... where M0 is a very rough estimate of the seismic energy of an earthquake (in dynes-cm). (a) The Kern County earthquake of 1952 released about 2 × 1027 dyne-cm of seismic energy. What was the moment magnitude of the Kern County earthquake? (b) The El Centro earthquake of 1940 had a moment magnitude o ...
... where M0 is a very rough estimate of the seismic energy of an earthquake (in dynes-cm). (a) The Kern County earthquake of 1952 released about 2 × 1027 dyne-cm of seismic energy. What was the moment magnitude of the Kern County earthquake? (b) The El Centro earthquake of 1940 had a moment magnitude o ...
this PDF file - University of Leicester Open Journals
... be seen without a powerful telescope. The bright star we can see is called Sirius A and the companion star predicted by Bessel is Sirius B – a white dwarf, so called due to its small size and white hot glow. The existence of this star was a great puzzle because it was measured to be a similar size t ...
... be seen without a powerful telescope. The bright star we can see is called Sirius A and the companion star predicted by Bessel is Sirius B – a white dwarf, so called due to its small size and white hot glow. The existence of this star was a great puzzle because it was measured to be a similar size t ...
14-1 Reading Questions: Neutron Stars
... 1. A neutron star, containing a little more than _________ solar mass, compressed to a radius of about __________, can be left as a remnant after a type ______ supernova explosion. A neutron star’s density is so high that physicists calculate that this material is stable only as a __________________ ...
... 1. A neutron star, containing a little more than _________ solar mass, compressed to a radius of about __________, can be left as a remnant after a type ______ supernova explosion. A neutron star’s density is so high that physicists calculate that this material is stable only as a __________________ ...
Week 2
... constellation Cancer to the south at midnight. One week later at midnight this same star … A. will be somewhat southwest. B. will again be due south. C. will be somewhat southeast. D. won’t be visible (below the horizon). ...
... constellation Cancer to the south at midnight. One week later at midnight this same star … A. will be somewhat southwest. B. will again be due south. C. will be somewhat southeast. D. won’t be visible (below the horizon). ...
Activities, In the Footsteps of Galileo
... Activity: Observe and draw Venus when it is in its crescent phase. Try to view it at least twice, five to seven days apart. View through the “moon port” to decrease the glare from the planet’s intense light. How to locate Venus in its crescent phase: During its crescent phase, bright Venus can be fo ...
... Activity: Observe and draw Venus when it is in its crescent phase. Try to view it at least twice, five to seven days apart. View through the “moon port” to decrease the glare from the planet’s intense light. How to locate Venus in its crescent phase: During its crescent phase, bright Venus can be fo ...
Stars Part 1
... between height and weight for humans. - now add to your plot the population of basketball players who are very tall and very thin. - now add the population of obese children •The plot would show a cluster of people that would have similar “middle-of-the-road” height/weight ratios •It would also show ...
... between height and weight for humans. - now add to your plot the population of basketball players who are very tall and very thin. - now add the population of obese children •The plot would show a cluster of people that would have similar “middle-of-the-road” height/weight ratios •It would also show ...
Study Guide 4 Part A Outline
... Universe is expanding The expansion started at some definite time in the past (the Big Bang)Universe expands away from every galaxy. Every galaxy would see its own version of the Hubble Law. Quasars & Active Galactic Nuclei o Quasars and other active galaxies emit large amounts of energy from re ...
... Universe is expanding The expansion started at some definite time in the past (the Big Bang)Universe expands away from every galaxy. Every galaxy would see its own version of the Hubble Law. Quasars & Active Galactic Nuclei o Quasars and other active galaxies emit large amounts of energy from re ...
Solutions to Homework #4, AST 203, Spring 2009
... value seems wrong, take three points off. Answers differing slightly from the solutions given here because of slightly different rounding (e.g., off in the second decimal point for results that should be given to two significant figures) get full credit. Two points off per question for not being exp ...
... value seems wrong, take three points off. Answers differing slightly from the solutions given here because of slightly different rounding (e.g., off in the second decimal point for results that should be given to two significant figures) get full credit. Two points off per question for not being exp ...
Lecture Eight (Powerpoint format) - Flash
... The collapse of the disk is arrested at the center once the gas begins to heat up and can support itself under its own weight. At this point, the central “core” is entirely molecular in composition, is a few hundreds of degrees at its surface, and has a radius of a few AU (comparable to the orbi ...
... The collapse of the disk is arrested at the center once the gas begins to heat up and can support itself under its own weight. At this point, the central “core” is entirely molecular in composition, is a few hundreds of degrees at its surface, and has a radius of a few AU (comparable to the orbi ...
Micro_lect20
... • Core collapse stops, neutron star is formed • Rest of the star collapses in on the core, but bounces off the new neutron star (also pushed outwards by the neutrinos) ...
... • Core collapse stops, neutron star is formed • Rest of the star collapses in on the core, but bounces off the new neutron star (also pushed outwards by the neutrinos) ...
Final Study Guide
... b) a total eclipse of the moon. 4. List and describe the various features observed in and above the photosphere of the sun. 5. Name the various types of surface features on the moon and discuss their nature and origin. 6. Discuss the main differences between the terrestrial planets and the Jovian pl ...
... b) a total eclipse of the moon. 4. List and describe the various features observed in and above the photosphere of the sun. 5. Name the various types of surface features on the moon and discuss their nature and origin. 6. Discuss the main differences between the terrestrial planets and the Jovian pl ...
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.