Neutron Stars and Black Holes
... The mass of the proton is 1.67 X 10-24 g, and its radius is about 0.877 X 10-13 cm (according to the Wikipedia). The volume of the proton is 4/3 π r3 = 2.82 X 10-39 cm3. The density = mass/volume = 5.9 X 1014 g/cm3. The Sun’s mass is 2 X 1030 kg = 2 X 1033 g. A one solar mass black hole has radius r ...
... The mass of the proton is 1.67 X 10-24 g, and its radius is about 0.877 X 10-13 cm (according to the Wikipedia). The volume of the proton is 4/3 π r3 = 2.82 X 10-39 cm3. The density = mass/volume = 5.9 X 1014 g/cm3. The Sun’s mass is 2 X 1030 kg = 2 X 1033 g. A one solar mass black hole has radius r ...
PowerPoint プレゼンテーション
... molecular cloud core through its gravitational collapse. The dense cloud becomes flatted (along the associated magnetic field). The associated magnetic field is also dragged inward. A circumstellar disk is also formed around a YSO. A molecular outflow takes place at some point. Infall is terminated ...
... molecular cloud core through its gravitational collapse. The dense cloud becomes flatted (along the associated magnetic field). The associated magnetic field is also dragged inward. A circumstellar disk is also formed around a YSO. A molecular outflow takes place at some point. Infall is terminated ...
ISP205-2 Visions of the Universe
... The Solar System • Sun • 9 planets (8 planets?) • 65+ moons • comets • asteroids • dust • gas • cosmic rays ...
... The Solar System • Sun • 9 planets (8 planets?) • 65+ moons • comets • asteroids • dust • gas • cosmic rays ...
Stellar Evolution
... from the Earth • all the stars formed at about the same time Determining the distance and age to a globular cluster is much easier than trying to find the distances and ages of a million random stars! Laboratories for understanding how stars of different masses evolve ASTR 1120: Spring 2005 ...
... from the Earth • all the stars formed at about the same time Determining the distance and age to a globular cluster is much easier than trying to find the distances and ages of a million random stars! Laboratories for understanding how stars of different masses evolve ASTR 1120: Spring 2005 ...
Electromagnetic Spectrum
... spectrum, therefore the sun appears to be yellow. • Hotter objects peak on the blue side and cooler objects toward the red • Some objects in the sky are even hotter, and they will have their peaks in the UV, x-ray, or even gamma ray wavelengths. • This is why astronomers want to be able to detect al ...
... spectrum, therefore the sun appears to be yellow. • Hotter objects peak on the blue side and cooler objects toward the red • Some objects in the sky are even hotter, and they will have their peaks in the UV, x-ray, or even gamma ray wavelengths. • This is why astronomers want to be able to detect al ...
Westerlund 1 : A Super-Star Cluster within the Milky Way
... We present optical and IR photometric and spectroscopic observations of the young open cluster Westerlund 1 that indicate it is the first Super Star Cluster identified in the Milky Way. Wd1 hosts a rich population of OB supergiants, Wolf-Rayet stars, Luminous Blue Variables, Yellow Hypergiants and R ...
... We present optical and IR photometric and spectroscopic observations of the young open cluster Westerlund 1 that indicate it is the first Super Star Cluster identified in the Milky Way. Wd1 hosts a rich population of OB supergiants, Wolf-Rayet stars, Luminous Blue Variables, Yellow Hypergiants and R ...
File
... In this unit we will learn about: • How we measure stars’ distances using parallax • Why a star’s color indicates temperature & how to use Wien’s law to determine temperature • The difference between luminosity and brightness • How we can measure radius using temperature • The magnitude system of s ...
... In this unit we will learn about: • How we measure stars’ distances using parallax • Why a star’s color indicates temperature & how to use Wien’s law to determine temperature • The difference between luminosity and brightness • How we can measure radius using temperature • The magnitude system of s ...
Lifetime of Stars/ Fusion powers the stars—11 Oct
... Cluster of Stars • In a cluster of stars – All stars were born at the same time. – Some are massive and live a short life. • On a human scale: 20T if the sun scales to 100lb. • On a human scale: 5 wk if the sun scales to 70yr. ...
... Cluster of Stars • In a cluster of stars – All stars were born at the same time. – Some are massive and live a short life. • On a human scale: 20T if the sun scales to 100lb. • On a human scale: 5 wk if the sun scales to 70yr. ...
Astronomy 112: Physics of Stars Problem set 1 solutions 1
... The Sun is in thermal equilibrium because its thermal timescale is short compared to its age. However, smaller objects need not be in thermal equilibrium, and their radiation can be powered entirely by gravity. (a) Jupiter radiates more energy than it receives from the Sun by 8.7 × 10−10 L⊙ . Jupite ...
... The Sun is in thermal equilibrium because its thermal timescale is short compared to its age. However, smaller objects need not be in thermal equilibrium, and their radiation can be powered entirely by gravity. (a) Jupiter radiates more energy than it receives from the Sun by 8.7 × 10−10 L⊙ . Jupite ...
Assignment 7 - Department of Physics and Astronomy
... ____ 19. Stars that do not have what it takes to succeed as a star (i.e. do not have enough mass to fuse hydrogen into helium at their centers) are called: a. extras b. red giants c. spectroscopic stars d. brown dwarfs e. main sequence stars ____ 20. Which of the following has the smallest mass? a ...
... ____ 19. Stars that do not have what it takes to succeed as a star (i.e. do not have enough mass to fuse hydrogen into helium at their centers) are called: a. extras b. red giants c. spectroscopic stars d. brown dwarfs e. main sequence stars ____ 20. Which of the following has the smallest mass? a ...
AST 301 Test #3 Friday Nov. 12 Name: 1. a) The Sun is in
... Like a car, the 2 solar-mass star has twice as much fuel, but it is burning 10 times as much each second, so it only lasts 2/10 = 1/5 times as long. 6. a) Why does the core of a massive star collapse once fusion has turned the elements in the core into iron? Fusion of iron absorbs energy instead of ...
... Like a car, the 2 solar-mass star has twice as much fuel, but it is burning 10 times as much each second, so it only lasts 2/10 = 1/5 times as long. 6. a) Why does the core of a massive star collapse once fusion has turned the elements in the core into iron? Fusion of iron absorbs energy instead of ...
EvoluGon of high mass stars Solar-‐type stars end their lives by
... in this core is for gravita=onal contrac=on to occur. Once the Fe core is formed, and due to the small size and extreme density in the core, collapse occurs very rapidly and the temperature ...
... in this core is for gravita=onal contrac=on to occur. Once the Fe core is formed, and due to the small size and extreme density in the core, collapse occurs very rapidly and the temperature ...
- Stevenson High School
... 18. For October the 10th at 6 pm on the Star Wheel, look at the stars which are visible in the horizon. For our midnorthern hemisphere observer, which bright star is almost overhead at the zenith? ________________ 19. Suppose you set the Star Wheel for December 22 at midnight and look at the stars w ...
... 18. For October the 10th at 6 pm on the Star Wheel, look at the stars which are visible in the horizon. For our midnorthern hemisphere observer, which bright star is almost overhead at the zenith? ________________ 19. Suppose you set the Star Wheel for December 22 at midnight and look at the stars w ...
21 -26 August University of Exeter
... Investigating the dynamics of the interstellar medium (ISM) is key to gaining insight into the formation of starforming filaments in molecular clouds (MCs). A plethora of numerical and analytical models associate the origin of this filamentary structure to the interplay between self-gravity and magn ...
... Investigating the dynamics of the interstellar medium (ISM) is key to gaining insight into the formation of starforming filaments in molecular clouds (MCs). A plethora of numerical and analytical models associate the origin of this filamentary structure to the interplay between self-gravity and magn ...
2017 MIT Invitational
... (b) What is the luminosity of this star, in Watts? (c) What is the apparent magnitude of this star? (d) What is the radial velocity of this star, in km s−1 ? Is this star moving toward Earth or away from Earth? (e) This star has a proper motion of 50 milliarcseconds per year. What is its tangential ...
... (b) What is the luminosity of this star, in Watts? (c) What is the apparent magnitude of this star? (d) What is the radial velocity of this star, in km s−1 ? Is this star moving toward Earth or away from Earth? (e) This star has a proper motion of 50 milliarcseconds per year. What is its tangential ...
Lecture 9: The interstellar medium (ISM)
... higher pressures, but this is the result of their high masses, causing them to collapse and be compressed under their self gravity (they are the only phase of the ISM where self-gravity dominates over gas pressure) ...
... higher pressures, but this is the result of their high masses, causing them to collapse and be compressed under their self gravity (they are the only phase of the ISM where self-gravity dominates over gas pressure) ...
Lect16-3-28-and-30-1..
... As each stage of core burning ceases, the core collapses still further, becomes still denser and hotter, and a still heavier element begins to be produced. ...
... As each stage of core burning ceases, the core collapses still further, becomes still denser and hotter, and a still heavier element begins to be produced. ...
Introduction to Astronomy
... The Spectrograph Using a prism (or a grating), light can be split up into different wavelengths (colors!) to produce a spectrum. ...
... The Spectrograph Using a prism (or a grating), light can be split up into different wavelengths (colors!) to produce a spectrum. ...
Star Types - College of Engineering and Computer Science
... The Sun will expand and cool again, becoming a red giant. Earth will be engulfed and vaporized within the Sun. The Sun’s core will consist mostly of carbon. •Red Giants create most of the Carbon in the universe (from which organic molecules—and life—are made) ...
... The Sun will expand and cool again, becoming a red giant. Earth will be engulfed and vaporized within the Sun. The Sun’s core will consist mostly of carbon. •Red Giants create most of the Carbon in the universe (from which organic molecules—and life—are made) ...
Hertzsprung-Russell Diagram—7 Oct Outline • Thermal radiation
... Thermal infrared – Wavelength is 8,000‐12,000 nm – An object with a temperature of 300K emits most of its light in the thermal infrared. – Does infrared light show the same thing as visible light? ...
... Thermal infrared – Wavelength is 8,000‐12,000 nm – An object with a temperature of 300K emits most of its light in the thermal infrared. – Does infrared light show the same thing as visible light? ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.