Objectives
... • Recall that two factors determine the luminosity (brightness) of a star: • Temperature • Size • So, a cooler star may still appear bright if it is very large like…. • Giants • Upper right hand side of diagram • Approximately 10 to 100 times larger than our Sun • Ex- Aldebaran ...
... • Recall that two factors determine the luminosity (brightness) of a star: • Temperature • Size • So, a cooler star may still appear bright if it is very large like…. • Giants • Upper right hand side of diagram • Approximately 10 to 100 times larger than our Sun • Ex- Aldebaran ...
• This chapter concentrates on five goals:
... At the bend of the handle of the Big Dipper lies a pair of stars, Mizar and Alcor. Through a telescope you can discover that Mizar has a fainter companion and so is a member of a visual binary system. Adaptive optics observations have discovered a faint close companion of Alcor, not pictured in thi ...
... At the bend of the handle of the Big Dipper lies a pair of stars, Mizar and Alcor. Through a telescope you can discover that Mizar has a fainter companion and so is a member of a visual binary system. Adaptive optics observations have discovered a faint close companion of Alcor, not pictured in thi ...
Galaxies - Indiana University Astronomy
... square law. Recall that the distance in parsecs is related to the difference between the absolute and apparent magnitude as follows: Distance in parsecs = 10(m-M+5)/5 In this case, we know the distance and apparent magnitude and want to determine the absolute magnitude. The expression can be rewritt ...
... square law. Recall that the distance in parsecs is related to the difference between the absolute and apparent magnitude as follows: Distance in parsecs = 10(m-M+5)/5 In this case, we know the distance and apparent magnitude and want to determine the absolute magnitude. The expression can be rewritt ...
Foundation 1 - Discovering Astronomy
... main-sequence star becomes a giant • When hydrogen in the core is no longer fusing into helium, the star can no longer support its weight • The enormous weight from the outer layers compresses hydrogen in the layers just outside the core enough to initiate shell ...
... main-sequence star becomes a giant • When hydrogen in the core is no longer fusing into helium, the star can no longer support its weight • The enormous weight from the outer layers compresses hydrogen in the layers just outside the core enough to initiate shell ...
Lecture 17 Review
... either explodes or fragments into smaller clouds which form individual stars. A second question is, can the mass of the gas be too small. The answer is yes. If the mass of the cloud is too small it heats up from gravitational contraction, but never gets hot enough to ignite. The gas ball then reache ...
... either explodes or fragments into smaller clouds which form individual stars. A second question is, can the mass of the gas be too small. The answer is yes. If the mass of the cloud is too small it heats up from gravitational contraction, but never gets hot enough to ignite. The gas ball then reache ...
May 2013 - Joliet Junior College
... that Arcturus was 40 light years from Earth. (We now know it is closer to 37 light years.) In 1933, it had been 40 years since the last World’s Fair at Chicago (1893), so the promoters of the 1933 fair used the light from Arcturus to throw the switch to start the 1933 World’s Fair. To do so, they us ...
... that Arcturus was 40 light years from Earth. (We now know it is closer to 37 light years.) In 1933, it had been 40 years since the last World’s Fair at Chicago (1893), so the promoters of the 1933 fair used the light from Arcturus to throw the switch to start the 1933 World’s Fair. To do so, they us ...
Galaxy
... star (our sun); however, most are grouped together to groups of two or more – called star systems Star systems with 2 stars are called double stars or binary stars – 3 stars are called triple stars Sometimes binary stars cannot be seen from Earth – only one star can be seen ...
... star (our sun); however, most are grouped together to groups of two or more – called star systems Star systems with 2 stars are called double stars or binary stars – 3 stars are called triple stars Sometimes binary stars cannot be seen from Earth – only one star can be seen ...
Birth and Life of a Star
... elements like gold, lead and iron are created in much larger stars. The Expansion Phase: The Hydrogen in the core of the star has all been used and the star starts to ‘burn’ Helium this has greater radiant forces and so the outer layers expand to form a red giant. One and a half billion years later, ...
... elements like gold, lead and iron are created in much larger stars. The Expansion Phase: The Hydrogen in the core of the star has all been used and the star starts to ‘burn’ Helium this has greater radiant forces and so the outer layers expand to form a red giant. One and a half billion years later, ...
Birth and Life of a Star
... elements like gold, lead and iron are created in much larger stars. The Expansion Phase: The Hydrogen in the core of the star has all been used and the star starts to ‘burn’ Helium this has greater radiant forces and so the outer layers expand to form a red giant. One and a half billion years later, ...
... elements like gold, lead and iron are created in much larger stars. The Expansion Phase: The Hydrogen in the core of the star has all been used and the star starts to ‘burn’ Helium this has greater radiant forces and so the outer layers expand to form a red giant. One and a half billion years later, ...
Sequencing the Stars
... seem to be too bright. These are nearby stars that don’t belong to the globular cluster but just happen to be in the field of view. I like globular clusters so much that I tend to revisit my favorites each year and retake their picture. Hence, I can compare pairs of HR-diagrams of the same cluster t ...
... seem to be too bright. These are nearby stars that don’t belong to the globular cluster but just happen to be in the field of view. I like globular clusters so much that I tend to revisit my favorites each year and retake their picture. Hence, I can compare pairs of HR-diagrams of the same cluster t ...
Mapping the Stars
... • They are forced together to form neutrons. • What is a neutron star? • It is a star that has collapsed under gravity to the point at which all of its particles are neutrons. • What is a spinning neutron star called? • Pulsar ...
... • They are forced together to form neutrons. • What is a neutron star? • It is a star that has collapsed under gravity to the point at which all of its particles are neutrons. • What is a spinning neutron star called? • Pulsar ...
Slide 1 - Physics @ IUPUI
... • Hot spot – some emit x-rays from a hot spot that rotates around. • Accretion – this one is a combination of the other two. • Material tends to accrete more along the magnetic poles creating a magnetic hot ...
... • Hot spot – some emit x-rays from a hot spot that rotates around. • Accretion – this one is a combination of the other two. • Material tends to accrete more along the magnetic poles creating a magnetic hot ...
Distance measures - ScienceEducationatNewPaltz
... be made for atmospheric refraction and the effects of "seeing". Also stars actually do appear to move across the sky relative to other stars in a definite direction over time. This is called proper motion and must be accounted for when determining parallaxes. If you study the parallax diagram you wi ...
... be made for atmospheric refraction and the effects of "seeing". Also stars actually do appear to move across the sky relative to other stars in a definite direction over time. This is called proper motion and must be accounted for when determining parallaxes. If you study the parallax diagram you wi ...
btg_2016_astromony
... constellation Orion, are blue. Others, like Altair in Aquila, are white. Arcturus, a bright star in the northern spring sky, is yellow-orange. Yet others, like Betelguese in Orion or Antares in Scorpius are a deeper orange-red. The closest neighboring stars to our sun Alpha (one of the pointer stars ...
... constellation Orion, are blue. Others, like Altair in Aquila, are white. Arcturus, a bright star in the northern spring sky, is yellow-orange. Yet others, like Betelguese in Orion or Antares in Scorpius are a deeper orange-red. The closest neighboring stars to our sun Alpha (one of the pointer stars ...
April 1st
... • Not enough mass for fusion • Minimum mass of gas need for fusion is 0.08 solar masses (80 times the mass of Jupiter) ...
... • Not enough mass for fusion • Minimum mass of gas need for fusion is 0.08 solar masses (80 times the mass of Jupiter) ...
Powerpoint
... determine temperature from spectrum (black-body curve or spectral lines), then find surface area, Surface area Luminosity / (temperature) 4 then find radius (sphere surface area is 4 R2) ...
... determine temperature from spectrum (black-body curve or spectral lines), then find surface area, Surface area Luminosity / (temperature) 4 then find radius (sphere surface area is 4 R2) ...
Test #3
... b. the Earth would jump to a smaller orbit c. the size of the Earth's orbit would increase rapidly d. the Earth's orbit would remain the same 2. A neutron star is expected to spin rapidly because a. they conserved angular momentum when they collapsed. b. they have high orbital velocities. c. they ha ...
... b. the Earth would jump to a smaller orbit c. the size of the Earth's orbit would increase rapidly d. the Earth's orbit would remain the same 2. A neutron star is expected to spin rapidly because a. they conserved angular momentum when they collapsed. b. they have high orbital velocities. c. they ha ...
Neutron Stars - Otterbein University
... Small, rapidly rotating objects Can’t be white dwarfs; must be neutron stars ...
... Small, rapidly rotating objects Can’t be white dwarfs; must be neutron stars ...
A Star is
... • Our sun is considered a medium-sized star • Most stars visible from Earth are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less massive. ...
... • Our sun is considered a medium-sized star • Most stars visible from Earth are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less massive. ...
27.1: Characteristics of Stars
... Approximately 6000 stars are visible to the unaided eye from earth About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scale ...
... Approximately 6000 stars are visible to the unaided eye from earth About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scale ...
Our Universe
... DAY! Most of the time we never notice them, but with improving technologies we are detecting more of them, and detecting them earlier. ...
... DAY! Most of the time we never notice them, but with improving technologies we are detecting more of them, and detecting them earlier. ...
Study Guide: Unit 1, The Universe and its Stars, HS
... 31) HS-ESS1-1 The final stage for a star which is as massive as the Sun is a ________. A) red giant B) black hole C) main-sequence star D) white dwarf 32) HS-ESS1-1 When a main-sequence star has exhausted the fuel in the inner region, it becomes a ________. A) black hole B) main-sequence star C) bla ...
... 31) HS-ESS1-1 The final stage for a star which is as massive as the Sun is a ________. A) red giant B) black hole C) main-sequence star D) white dwarf 32) HS-ESS1-1 When a main-sequence star has exhausted the fuel in the inner region, it becomes a ________. A) black hole B) main-sequence star C) bla ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.