Answer to question 1 - Northwestern University
... expands and “over shoots the point where the internal heat (and light) pressure will hold up the envelope. •The result is that the envelope then comes ...
... expands and “over shoots the point where the internal heat (and light) pressure will hold up the envelope. •The result is that the envelope then comes ...
Introduction to Galaxies and Cosmology Exercises 2
... 9. (Challenging) A quasar emits two radiating clouds in our general direction at 13/14 the speed of light. They are first observed when they appear to have been first produced at the central powerhouse, and are subsequently observed to move apparently outward in opposite directions from the centre o ...
... 9. (Challenging) A quasar emits two radiating clouds in our general direction at 13/14 the speed of light. They are first observed when they appear to have been first produced at the central powerhouse, and are subsequently observed to move apparently outward in opposite directions from the centre o ...
Galaxies and the Big Bang Theory
... A _______________ _________________ is a device used to detect long radio waves from objects in space. A ___________ is a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity The three different types of galaxies that exist in our universe are: ...
... A _______________ _________________ is a device used to detect long radio waves from objects in space. A ___________ is a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity The three different types of galaxies that exist in our universe are: ...
The Life Cycle of Stars Introduction Stars are huge spheres of very
... remnants will become a white dwarf, a small, dim, and very dense star about the size of Earth. White dwarfs no longer fuse elements, so they slowly cool. All stars that have a mass of 1.4 solar masses or smaller, or a mass of less than 1.4 times the mass of our sun, will have a similar life cycle. I ...
... remnants will become a white dwarf, a small, dim, and very dense star about the size of Earth. White dwarfs no longer fuse elements, so they slowly cool. All stars that have a mass of 1.4 solar masses or smaller, or a mass of less than 1.4 times the mass of our sun, will have a similar life cycle. I ...
Slide 1
... RED GIANT PHASE of star’s existance A star experiences an energy crisis and its core collapses when the star's basic, nonrenewable energy source - hydrogen - is used up. A shell of hydrogen on the edge of the collapsed core will be compressed and heated. The nuclear fusion of the hydrogen in the sh ...
... RED GIANT PHASE of star’s existance A star experiences an energy crisis and its core collapses when the star's basic, nonrenewable energy source - hydrogen - is used up. A shell of hydrogen on the edge of the collapsed core will be compressed and heated. The nuclear fusion of the hydrogen in the sh ...
Star Life Cycle – Web Activity
... 3. How long ago was our sun born in a nebula? Protostar 4. Click on the animation that shows how a star forms from a nebula. Describe why the core of a forming star is hot. ...
... 3. How long ago was our sun born in a nebula? Protostar 4. Click on the animation that shows how a star forms from a nebula. Describe why the core of a forming star is hot. ...
Unit 3 - Section 9.1 2011 Distances in Space
... Return to the diagram above The diameter of the Earth’s orbit around the Sun is 300,000,000 kilometers. (Question: How do I know that distance?) On dates separated by half-a-year, the Earth position…and where you are relative to the star between viewed…is 300,00,000 kilometers apart. The stars d ...
... Return to the diagram above The diameter of the Earth’s orbit around the Sun is 300,000,000 kilometers. (Question: How do I know that distance?) On dates separated by half-a-year, the Earth position…and where you are relative to the star between viewed…is 300,00,000 kilometers apart. The stars d ...
Grade 9 Academic Science – Unit 3 Space
... Return to the diagram above The diameter of the Earth’s orbit around the Sun is 300,000,000 kilometers. (Question: How do I know that distance?) On dates separated by half-a-year, the Earth position…and where you are relative to the star between viewed…is 300,00,000 kilometers apart. The stars d ...
... Return to the diagram above The diameter of the Earth’s orbit around the Sun is 300,000,000 kilometers. (Question: How do I know that distance?) On dates separated by half-a-year, the Earth position…and where you are relative to the star between viewed…is 300,00,000 kilometers apart. The stars d ...
The Properties of Stars
... relatively short life (30 million years) • Cores complete many fusion reactions: • Hydrogen →helium → carbon → neon → silicon → iron ...
... relatively short life (30 million years) • Cores complete many fusion reactions: • Hydrogen →helium → carbon → neon → silicon → iron ...
Document
... Neutron stars emit little visible light Some neutron stars emit beams of radio waves as they spin – these stars are called pulsars because the seem to pulse as the beams rotate ...
... Neutron stars emit little visible light Some neutron stars emit beams of radio waves as they spin – these stars are called pulsars because the seem to pulse as the beams rotate ...
Chapter 19 Star Formation
... opaque to its own radiation: It has a photosphere! After this, the ‘trapped radiation heats the interior of the object as it contracts. Stage 3: Object becomes opaque and heats. The interior of the fragment has begun heating and is about 10,000 K. This is hot enough to ionize hydrogen, but not much ...
... opaque to its own radiation: It has a photosphere! After this, the ‘trapped radiation heats the interior of the object as it contracts. Stage 3: Object becomes opaque and heats. The interior of the fragment has begun heating and is about 10,000 K. This is hot enough to ionize hydrogen, but not much ...
Chapter 19 Star Formation
... opaque to its own radiation: It has a photosphere! After this, the ‘trapped radiation heats the interior of the object as it contracts. Stage 3: Object becomes opaque and heats. The interior of the fragment has begun heating and is about 10,000 K. This is hot enough to ionize hydrogen, but not much ...
... opaque to its own radiation: It has a photosphere! After this, the ‘trapped radiation heats the interior of the object as it contracts. Stage 3: Object becomes opaque and heats. The interior of the fragment has begun heating and is about 10,000 K. This is hot enough to ionize hydrogen, but not much ...
Stars: some basic characteristics
... If you zoom way in, you can see that the brightest objects are all very blue or very red. The blue ones are mostly hot O- and B- type stars (or “horizontal branch” stars), and the red ones are cool giants ...
... If you zoom way in, you can see that the brightest objects are all very blue or very red. The blue ones are mostly hot O- and B- type stars (or “horizontal branch” stars), and the red ones are cool giants ...
O star
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
The Evolution of Low Mass Stars
... space, forming a planetary nebula. After this nebula dissipates, only the core of the star remains. This is called a white dwarf. It is not hot enough to fuse C and O, so it will cool and fade very slowly forever. ...
... space, forming a planetary nebula. After this nebula dissipates, only the core of the star remains. This is called a white dwarf. It is not hot enough to fuse C and O, so it will cool and fade very slowly forever. ...
Lecture 17 Review
... Interstellar extinction - When enough gas and dust is in the way, far away objects cannot be seen because light is scattered out of the line of sight. Thus, we cannot see the galactic center with visible light. That these clouds are the source of stars follows from several observations: ...
... Interstellar extinction - When enough gas and dust is in the way, far away objects cannot be seen because light is scattered out of the line of sight. Thus, we cannot see the galactic center with visible light. That these clouds are the source of stars follows from several observations: ...
North Star pulses brightly with constant change
... People believe a lot of things that are simply untrue. Like that it's cold in winter because Earth is farther from the sun. Or that Polaris, the "North Star," is the brightest star in the sky. Polaris is only the 49th-brightest star visible from Earth. But two things make Polaris special. One is tha ...
... People believe a lot of things that are simply untrue. Like that it's cold in winter because Earth is farther from the sun. Or that Polaris, the "North Star," is the brightest star in the sky. Polaris is only the 49th-brightest star visible from Earth. But two things make Polaris special. One is tha ...
Star Types
... We can “weigh” stars that are in binary systems (two stars orbiting each other). Fortunately, most stars fall into this category. ...
... We can “weigh” stars that are in binary systems (two stars orbiting each other). Fortunately, most stars fall into this category. ...
Double Stars in Scorpio`s Claws
... stars that are a rewarding challenge to any astronomer. Some of these are actual double stars (pairs of stars that orbit about each other), others are ‘apparent doubles’ – stars that simply lie along the same line of sight, but are very distant from each other in space. The map below indicates the l ...
... stars that are a rewarding challenge to any astronomer. Some of these are actual double stars (pairs of stars that orbit about each other), others are ‘apparent doubles’ – stars that simply lie along the same line of sight, but are very distant from each other in space. The map below indicates the l ...
Yeatman-Liddell College Preparatory Middle School Winter
... Unlike our Sun, giant stars contract or draw in upon themselves. They begin to absorb energy instead ...
... Unlike our Sun, giant stars contract or draw in upon themselves. They begin to absorb energy instead ...
Review Questions for Exam #2
... • Sketch an H-R diagram. Label the axes and indicate the direction of increase along each axis. • Draw in the location of the main-sequence, super giants (I) the giants (III) and the white dwarfs. • On the main-sequence, indicate with an arrow the direction of increasing mass. • Given the arrow tha ...
... • Sketch an H-R diagram. Label the axes and indicate the direction of increase along each axis. • Draw in the location of the main-sequence, super giants (I) the giants (III) and the white dwarfs. • On the main-sequence, indicate with an arrow the direction of increasing mass. • Given the arrow tha ...
Week 9 Concept Summary - UC Berkeley Astronomy w
... below), while their upper layers will gently puff away. The large nebulae formed by the escaping gas is called a planetary nebula, though it has nothing to do with planets. The exposed core is very hot, but very small, a white dwarf. They slowly cool off, emitting blackbody radiation, but generating ...
... below), while their upper layers will gently puff away. The large nebulae formed by the escaping gas is called a planetary nebula, though it has nothing to do with planets. The exposed core is very hot, but very small, a white dwarf. They slowly cool off, emitting blackbody radiation, but generating ...
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.