Pretest
... than low beams do. Also, the closer an oncoming car is to you, the greater the apparent brightness of its headlights (on low or high). 21. Low-mass stars have longer lifetimes than do high-mass stars because low-mass stars use up their fuel much more slowly. 22. Because of high temperatures in the i ...
... than low beams do. Also, the closer an oncoming car is to you, the greater the apparent brightness of its headlights (on low or high). 21. Low-mass stars have longer lifetimes than do high-mass stars because low-mass stars use up their fuel much more slowly. 22. Because of high temperatures in the i ...
The Hertzsprung-Russell Diagram
... star called a red dwarf. In this first stage of life, our sun was a dim red star. Circle an area and put a 1 on your H-R diagram to show the first stage of the sun’s formation. b. As the sun grew older and fusion continued, it became a stable star and entered the main sequence stage of its life cycl ...
... star called a red dwarf. In this first stage of life, our sun was a dim red star. Circle an area and put a 1 on your H-R diagram to show the first stage of the sun’s formation. b. As the sun grew older and fusion continued, it became a stable star and entered the main sequence stage of its life cycl ...
Stellar Evolution Before…..During……and After…. The Main
... In a Main Sequence star Hydrostatic Equilibrium balances 2 forces, pressure and gravity, to keep the star from imploding or exploding. If the mass of the outer portion of the star was ...
... In a Main Sequence star Hydrostatic Equilibrium balances 2 forces, pressure and gravity, to keep the star from imploding or exploding. If the mass of the outer portion of the star was ...
Page 1 Astronomy 110 Homework #08 Assigned: 03/13/2007 Due
... C) The line of sight from Earth to the star system must be in or very close to the orbital plane of the stars. D) The line of sight from Earth to the star system must be very close to the perpendicular to the orbital plane of the stars. ...
... C) The line of sight from Earth to the star system must be in or very close to the orbital plane of the stars. D) The line of sight from Earth to the star system must be very close to the perpendicular to the orbital plane of the stars. ...
Test#3
... 5. Which of the following can produce a continuous spectrum? a) a cold gas at low density, b) a hot gas at low density c) a gas consisting entirely of molecules, d) a hot solid 6. The property of a star which determines its spectral class is its a) chemical composition, b) temperature, c) radial vel ...
... 5. Which of the following can produce a continuous spectrum? a) a cold gas at low density, b) a hot gas at low density c) a gas consisting entirely of molecules, d) a hot solid 6. The property of a star which determines its spectral class is its a) chemical composition, b) temperature, c) radial vel ...
Yes, we are all star dust. Even Gary!
... “funerary” nebulae. The “life steps” taken depend on the mass of the star: 0.1 – 1.4 solar masses = condense, main sequence star of Hertzprung-Russell Diagram (ie like our Sun). Core condenses and outer layers expand to a giant star, possible nebula, ending as white dwarf. 1.4 – 8.0 = much faster ve ...
... “funerary” nebulae. The “life steps” taken depend on the mass of the star: 0.1 – 1.4 solar masses = condense, main sequence star of Hertzprung-Russell Diagram (ie like our Sun). Core condenses and outer layers expand to a giant star, possible nebula, ending as white dwarf. 1.4 – 8.0 = much faster ve ...
Lecture 10: The Hertzsprung
... There is a mass-luminosity relation on the main sequence. We can use that + a sample of stars where we get all the stars within a certain distance of the Sun to figure out how many stars of what masses are out there. Answer: Lots of low-mass stars! Very few high-mass stars. This is something our the ...
... There is a mass-luminosity relation on the main sequence. We can use that + a sample of stars where we get all the stars within a certain distance of the Sun to figure out how many stars of what masses are out there. Answer: Lots of low-mass stars! Very few high-mass stars. This is something our the ...
Star Formation
... Massive newborn stars are indicated by the arrows. Note that some (2, 3, & 4) are hidden to visible light. Arrows 1 and 5 indicate a compact cluster of bright young stars. Sources 6 & 7 may be due to outflow jets from the cluster 5. ...
... Massive newborn stars are indicated by the arrows. Note that some (2, 3, & 4) are hidden to visible light. Arrows 1 and 5 indicate a compact cluster of bright young stars. Sources 6 & 7 may be due to outflow jets from the cluster 5. ...
Lecture 33: The Lives of Stars Astronomy 141
... Main Sequence stars are powered by the fusion of Hydrogen into Helium in their cores The more massive a star is, the shorter its lifetime. Low-Mass stars are long-lived, spend some time as Red Giants, then leave behind a White Dwarf. Very high-mass stars have very short lives, spend a short time as ...
... Main Sequence stars are powered by the fusion of Hydrogen into Helium in their cores The more massive a star is, the shorter its lifetime. Low-Mass stars are long-lived, spend some time as Red Giants, then leave behind a White Dwarf. Very high-mass stars have very short lives, spend a short time as ...
The Universe - Lancaster High School
... 2. Nova – Stars bigger than Sun – explosion 3. Supernova – Most massive stars – Chuck Norris of explosions. -can be as bright as an entire galaxy ...
... 2. Nova – Stars bigger than Sun – explosion 3. Supernova – Most massive stars – Chuck Norris of explosions. -can be as bright as an entire galaxy ...
Astronomy Day 2006: A short presentation on eclipsing binary stars
... Just what are they? Why do we care? It is recognized as fact by astronomers that well over half of the stars in the universe belong to multiple systems. You might think of our Sun as being an exceptional system that involves only one star and you would be right. ...
... Just what are they? Why do we care? It is recognized as fact by astronomers that well over half of the stars in the universe belong to multiple systems. You might think of our Sun as being an exceptional system that involves only one star and you would be right. ...
What is a Star
... These stars are composed mainly of neutrons and are produced from the remnants of the core when a supernova explodes. Neutron stars are very dense, having a mass between 1,44 and 3 times the Sun but a diameter of only few kilometres. A spoonful of a neutron star has a mass of 10.000.000.000 kg. If t ...
... These stars are composed mainly of neutrons and are produced from the remnants of the core when a supernova explodes. Neutron stars are very dense, having a mass between 1,44 and 3 times the Sun but a diameter of only few kilometres. A spoonful of a neutron star has a mass of 10.000.000.000 kg. If t ...
AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University
... difference of 5 magnitudes to equal exactly a factor of 100 in apparent brightness • If m1 and m2 are the apparent magnitudes with apparent brightness f1 and f1 m2 − m1 = 2.5 log10 (f1 /f2 ) ...
... difference of 5 magnitudes to equal exactly a factor of 100 in apparent brightness • If m1 and m2 are the apparent magnitudes with apparent brightness f1 and f1 m2 − m1 = 2.5 log10 (f1 /f2 ) ...
Week 5 (10/16) – Quiz #11
... the wavelength of peak radiation bear an inverse relation to each other B. The luminosity of a black body is proportional to its temperature raised to the fourth power C. Atoms are capable of absorbing and re-emitting photons D. The energy of a photon is given by the formula: E = mc2 ...
... the wavelength of peak radiation bear an inverse relation to each other B. The luminosity of a black body is proportional to its temperature raised to the fourth power C. Atoms are capable of absorbing and re-emitting photons D. The energy of a photon is given by the formula: E = mc2 ...
deep space - altaastronomy
... • If they are black how do we know they are there? • Black holes can be found by: • 1. Their gravitational effects on other objects. • 2. X-ray radiation from material falling into the black hole. ...
... • If they are black how do we know they are there? • Black holes can be found by: • 1. Their gravitational effects on other objects. • 2. X-ray radiation from material falling into the black hole. ...
SETI: First Considerations (PowerPoint)
... Numbers of Stars The Milky Way is forming about one new star a year, and an ‘average’ star (like the Sun) might last about ten billion years. In the ‘steady state,’ there will be at least several billion radiating stars out there. Stars much more massive than the Sun burn up their fuel very quickly, ...
... Numbers of Stars The Milky Way is forming about one new star a year, and an ‘average’ star (like the Sun) might last about ten billion years. In the ‘steady state,’ there will be at least several billion radiating stars out there. Stars much more massive than the Sun burn up their fuel very quickly, ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.