CHAPTER 14
... 3. A typical white dwarf will have 0.8 solar masses, a diameter of 10,000 km (3/4 of Earth’s), and a density of 106 g/cm3. A teaspoon of white dwarf material would weigh two tons. 4. To get to the white dwarf stage, a low-mass star will have gone through these stages: protostar, main sequence star, ...
... 3. A typical white dwarf will have 0.8 solar masses, a diameter of 10,000 km (3/4 of Earth’s), and a density of 106 g/cm3. A teaspoon of white dwarf material would weigh two tons. 4. To get to the white dwarf stage, a low-mass star will have gone through these stages: protostar, main sequence star, ...
PH709-assn-answers
... further away the outer planet is from the central star and (ii) how much larger the outer exoplanet is than the inner planet. Assuming they have the same density, calculate which exoplanet will cause (i) the highest variation in radial velocity and (ii) the largest wobble in location of the central ...
... further away the outer planet is from the central star and (ii) how much larger the outer exoplanet is than the inner planet. Assuming they have the same density, calculate which exoplanet will cause (i) the highest variation in radial velocity and (ii) the largest wobble in location of the central ...
Exercise 5
... b. Thus, the solar spectrum (the spectrum of the Sun) is a mystery indeed. How can the Sun’s spectrum be so continuous (as opposed to the fluorescent or incandescent bulb, which have discrete spectra)? That is, what does the continuous nature of the solar spectrum tell you about the Sun? Hint: I hav ...
... b. Thus, the solar spectrum (the spectrum of the Sun) is a mystery indeed. How can the Sun’s spectrum be so continuous (as opposed to the fluorescent or incandescent bulb, which have discrete spectra)? That is, what does the continuous nature of the solar spectrum tell you about the Sun? Hint: I hav ...
HR-diagram - Bakersfield College
... Magnitude is measured using (-) and (+) numbers the more (-) the number, the brighter the more (+), the dimmer the star ...
... Magnitude is measured using (-) and (+) numbers the more (-) the number, the brighter the more (+), the dimmer the star ...
Astronomy 101 Exam 3, Form A Name: SUID: Lab section number:
... • Students who do not speak English well may use a translation dictionary. • If you have a question, raise your hand, and a proctor will assist you. • Do not attempt to communicate with anyone other than teaching staff during the exam. • This exam has 27 multiple choice questions worth 3 points each ...
... • Students who do not speak English well may use a translation dictionary. • If you have a question, raise your hand, and a proctor will assist you. • Do not attempt to communicate with anyone other than teaching staff during the exam. • This exam has 27 multiple choice questions worth 3 points each ...
Astrophysics
... a) (3 points) Imagine a large cloud of pure interstellar hydrogen having density n atoms/cm3 . Φ is the number of photons emitted by a star per second which are capable of photoionizing neutral hydrogen (λ < 912Å), while αn2 is the number of recombinations per second per cm3 . If each photon result ...
... a) (3 points) Imagine a large cloud of pure interstellar hydrogen having density n atoms/cm3 . Φ is the number of photons emitted by a star per second which are capable of photoionizing neutral hydrogen (λ < 912Å), while αn2 is the number of recombinations per second per cm3 . If each photon result ...
STARS Chapter 8 Section 1
... Measuring the distances of stars with parallax**** • Parallax is the object’s apparent shift in motion when viewed from different locations. It is an optical effect. • Astronomers can measure parallax and use it to calculate exact distances to stars. • Does the man on the right(V2) see the moon as ...
... Measuring the distances of stars with parallax**** • Parallax is the object’s apparent shift in motion when viewed from different locations. It is an optical effect. • Astronomers can measure parallax and use it to calculate exact distances to stars. • Does the man on the right(V2) see the moon as ...
Stan Woosley (UCSC)
... vibrations - Burrows et al (2006) Alfven waves or reconnection – Suzuki and Nagataki (2005) magnetic confinement – Thompson (2003) ...
... vibrations - Burrows et al (2006) Alfven waves or reconnection – Suzuki and Nagataki (2005) magnetic confinement – Thompson (2003) ...
Lecture 13
... cores are no longer on the main sequence. • They may be fusing He to Carbon in their core or fusing H to He in shell outside the core … but there is no H to He fusion in the core. • All stars become larger and redder after exhausting their core hydrogen fuel: giants and supergiants. • Most stars end ...
... cores are no longer on the main sequence. • They may be fusing He to Carbon in their core or fusing H to He in shell outside the core … but there is no H to He fusion in the core. • All stars become larger and redder after exhausting their core hydrogen fuel: giants and supergiants. • Most stars end ...
2009_ASU_Exam
... 2) Although the initial explosion ejects the outer layers of the star, most of the gas in the remnant is not from the star itself. As the ejected material expands outwards, it encounters and intermingles with the interstellar medium and propels it outward, building up the outer shock wave. In a typi ...
... 2) Although the initial explosion ejects the outer layers of the star, most of the gas in the remnant is not from the star itself. As the ejected material expands outwards, it encounters and intermingles with the interstellar medium and propels it outward, building up the outer shock wave. In a typi ...
Notes for Unit 5
... Uranus, Neptune, Pluto), which, with the exception of Pluto, are large, gaseous planets. (Pluto is the exception; it is terrestrial and is quite small.) Other bodies in our Solar System: -between Mars and Jupiter is the asteroid belt. The asteroids in this belt orbit the sun. Asteroids range in size ...
... Uranus, Neptune, Pluto), which, with the exception of Pluto, are large, gaseous planets. (Pluto is the exception; it is terrestrial and is quite small.) Other bodies in our Solar System: -between Mars and Jupiter is the asteroid belt. The asteroids in this belt orbit the sun. Asteroids range in size ...
Merak
... letter Beta. Merak is a lot like our sun just older! A third magnitude star in brightness in the scale of at 2.3, Merak is located in Right Ascension (Celestial Longitude) 11 hour 2 minutes and 27 seconds and Declination (Celestial Latitude) 56 degree 19 minutes and 41 seconds. Merak has surface tem ...
... letter Beta. Merak is a lot like our sun just older! A third magnitude star in brightness in the scale of at 2.3, Merak is located in Right Ascension (Celestial Longitude) 11 hour 2 minutes and 27 seconds and Declination (Celestial Latitude) 56 degree 19 minutes and 41 seconds. Merak has surface tem ...
Energy Generation in Stars
... Stellar evolution is governed by a constant battle between Pressure (P) and Gravity (G). Keep in mind that a star is just a big ball of gas. Three things can happen: P=G: the star is stable; energy generation is occurring in its core This provides gas pressure which prevents the collapse of the ...
... Stellar evolution is governed by a constant battle between Pressure (P) and Gravity (G). Keep in mind that a star is just a big ball of gas. Three things can happen: P=G: the star is stable; energy generation is occurring in its core This provides gas pressure which prevents the collapse of the ...
Stars
... In a star like the Sun, electron degeneracy stops the contraction of the core before the temperature gets high enough to start carbon burning. Supported against further contraction, the core cannot get any more energy by gravitational contraction. From this point on, the core cools down like an ordi ...
... In a star like the Sun, electron degeneracy stops the contraction of the core before the temperature gets high enough to start carbon burning. Supported against further contraction, the core cannot get any more energy by gravitational contraction. From this point on, the core cools down like an ordi ...
Exam 03
... B) When viewed through a cloud of interstellar gas and dust,a star will appear redder than it actually is. The blue light it emits will be scattered more by the cloud than the red light will be. C) A cloud of interstellar gas and dust will absorb red light and transmit blue. The interstellar cloud a ...
... B) When viewed through a cloud of interstellar gas and dust,a star will appear redder than it actually is. The blue light it emits will be scattered more by the cloud than the red light will be. C) A cloud of interstellar gas and dust will absorb red light and transmit blue. The interstellar cloud a ...
Exam #: Printed Name: Signature: PHYSICS DEPARTMENT
... The surface temperature of the Sun is 6000 K. The sunlight striking the Earth’s surface has a power per unit area of 1300 W/m2 . a) What is the typical energy of a photon emitted from the Sun? b) Estimate (to within an order of magnitude) the number of photons per second from the Sun that strike the ...
... The surface temperature of the Sun is 6000 K. The sunlight striking the Earth’s surface has a power per unit area of 1300 W/m2 . a) What is the typical energy of a photon emitted from the Sun? b) Estimate (to within an order of magnitude) the number of photons per second from the Sun that strike the ...