METRIC PREFIXES
... 1. One light-year in the distance light travels in one year. This distance is equal to 9.461 x 1015m. After the sun, the star nearest to Earth is Alpha Centauri, which is about 4.35 light- years from Earth. Express this distance in a. megameters ...
... 1. One light-year in the distance light travels in one year. This distance is equal to 9.461 x 1015m. After the sun, the star nearest to Earth is Alpha Centauri, which is about 4.35 light- years from Earth. Express this distance in a. megameters ...
Sample Exam Questions
... a) depend on the observer's position on Earth b) change periodically because of the daily rotation of the Earth c) describe its location relative to fixed locations on the celestial sphere d) are measured in the same units as longitude and latitude 5. The distance of 0.01 m would be written in scien ...
... a) depend on the observer's position on Earth b) change periodically because of the daily rotation of the Earth c) describe its location relative to fixed locations on the celestial sphere d) are measured in the same units as longitude and latitude 5. The distance of 0.01 m would be written in scien ...
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... 10. If astronomers observe a star’s spectrum shifted toward the red end, how is the star moving relative to Earth? ...
... 10. If astronomers observe a star’s spectrum shifted toward the red end, how is the star moving relative to Earth? ...
Supernovae, Neutron Stars, Black Holes
... as a ___________ with a density equal to that of an ______________ ...
... as a ___________ with a density equal to that of an ______________ ...
Do flares in Saggitarius A* reflect the last stage of tidal capture
... way that the orbit is becoming more and more eccentric (parabolic) with the angular momentum slowly approaching the angular momentum of tidal capture l=4 m MBH c . The last tidal kick, that occurs just before capture, releases ~10% mc2 of tidal energy to the asteroid, which is more than enough to he ...
... way that the orbit is becoming more and more eccentric (parabolic) with the angular momentum slowly approaching the angular momentum of tidal capture l=4 m MBH c . The last tidal kick, that occurs just before capture, releases ~10% mc2 of tidal energy to the asteroid, which is more than enough to he ...
Chapter 13 Notes – The Deaths of Stars
... Sun will expand to a red giant in ______________ billion years Expands to ______________ radius Earth will then be ___________________ Sun MAY form a ________________ nebula (but uncertain) Sun’s C, O core will become a ______________ dwarf VIII. The Deaths of Massive Stars: Supernovae F ...
... Sun will expand to a red giant in ______________ billion years Expands to ______________ radius Earth will then be ___________________ Sun MAY form a ________________ nebula (but uncertain) Sun’s C, O core will become a ______________ dwarf VIII. The Deaths of Massive Stars: Supernovae F ...
August Evening Skies
... first magnitude or brighter are visible. In order of brightness they are: Jupiter, Arcturus, Vega, Altair, Antares, Spica, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled on the map. The double star (Dbl) at the bend of the handle of the Big Dippe ...
... first magnitude or brighter are visible. In order of brightness they are: Jupiter, Arcturus, Vega, Altair, Antares, Spica, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled on the map. The double star (Dbl) at the bend of the handle of the Big Dippe ...
Questions for this book (Word format)
... 2. The observed properties of a star are its surface temperature, its chemical composition and its radius (deduced from luminosity and surface temperature). Theoretical astrophysicists study stellar structure by constructing computer models of stars which reproduce these observed properties. What in ...
... 2. The observed properties of a star are its surface temperature, its chemical composition and its radius (deduced from luminosity and surface temperature). Theoretical astrophysicists study stellar structure by constructing computer models of stars which reproduce these observed properties. What in ...
Objects Beyond our Solar System
... it would have a mass of millions of kilograms. These stars are very small, just a few km across but they still have a mass that is as great as the sun. The gravity of these stars are incredible; if you dropped a marshmallow onto the surface of a neutron star it would have as much energy as a nuc ...
... it would have a mass of millions of kilograms. These stars are very small, just a few km across but they still have a mass that is as great as the sun. The gravity of these stars are incredible; if you dropped a marshmallow onto the surface of a neutron star it would have as much energy as a nuc ...
Week 11 Answers
... 6. What is the description of gravity that comes from the General Theory of Relativity? Gravity is a curvature of space-time, into some other direction beside the 3 space-like and 1 time-like dimensions that we are used to thinking about. In the analogy used in class, a bug lives on a surface that ...
... 6. What is the description of gravity that comes from the General Theory of Relativity? Gravity is a curvature of space-time, into some other direction beside the 3 space-like and 1 time-like dimensions that we are used to thinking about. In the analogy used in class, a bug lives on a surface that ...
Class 12 : Star formation I : The Interstellar Medium (ISM)
... if its mass is above a critical amount given by… ...
... if its mass is above a critical amount given by… ...
Honors Physics – Ch 7 Practice Problems
... each. How far apart must these two ships be to exert a gravitational attraction of 1.0 × 10-3 N on each other? 5. Jupiter, the largest planet in the solar system, has a mass 318 times that of Earth and a volume that is 1323 times greater than Earth’s. Calculate the magnitude of the gravitational for ...
... each. How far apart must these two ships be to exert a gravitational attraction of 1.0 × 10-3 N on each other? 5. Jupiter, the largest planet in the solar system, has a mass 318 times that of Earth and a volume that is 1323 times greater than Earth’s. Calculate the magnitude of the gravitational for ...
ES High mass star life cycle plus black holes
... What is the heaviest element forms in the center of a high mass star? Why is supernova crucial to our existence? Where is calcium formed in the life a high mass star? What is a supernova? What are the 2 final stages of a high mass star? It is either one or the other. What makes the difference betwee ...
... What is the heaviest element forms in the center of a high mass star? Why is supernova crucial to our existence? Where is calcium formed in the life a high mass star? What is a supernova? What are the 2 final stages of a high mass star? It is either one or the other. What makes the difference betwee ...
The Sun's Crowded Delivery Room
... meteorites, which formed 1 My after initial solar system formation, have no evidence for 60Fe (low ε60Ni) www.psrd.hawaii.edu/July07/iron-60.html ...
... meteorites, which formed 1 My after initial solar system formation, have no evidence for 60Fe (low ε60Ni) www.psrd.hawaii.edu/July07/iron-60.html ...
Lecture110402
... security number Chapters 1-16 It will concentrate on Chapters 4, 12-16 (about 3/4 of exam) Some questions are directly from the homework and quizzes ...
... security number Chapters 1-16 It will concentrate on Chapters 4, 12-16 (about 3/4 of exam) Some questions are directly from the homework and quizzes ...
29 October: Dead Stars 3
... density and temperature • Extremely dense, “degenerate” gas PV=Kn. Pressure depends only on density • Demo ...
... density and temperature • Extremely dense, “degenerate” gas PV=Kn. Pressure depends only on density • Demo ...
Stellar Metamorphosis: The Nearest Star
... Abstract: In stellar metamorphosis humanities’ closest star is the Earth itself. Explanation is provided. In the so-called “established sciences” the closest star to the Earth is the Sun, and the closest star to Earth besides the Sun is Proxima Centauri. This is not complete. According to stellar me ...
... Abstract: In stellar metamorphosis humanities’ closest star is the Earth itself. Explanation is provided. In the so-called “established sciences” the closest star to the Earth is the Sun, and the closest star to Earth besides the Sun is Proxima Centauri. This is not complete. According to stellar me ...
Lecture4
... The visible-light spectrum of the Sun is wrapped here end to end from red to blue. The dark “lines” are wavelengths that are absorbed by atoms in the Sun’s outer layers. There are millions of “lines” in the Sun’s spectrum. ...
... The visible-light spectrum of the Sun is wrapped here end to end from red to blue. The dark “lines” are wavelengths that are absorbed by atoms in the Sun’s outer layers. There are millions of “lines” in the Sun’s spectrum. ...
NAME___________ _PERIOD____DATE_____________ 29.3
... occurs during the formation of a star. What is the correct label for the blank in the diagram? ...
... occurs during the formation of a star. What is the correct label for the blank in the diagram? ...
TU Muscae and the Early-type Overcontact Binaries
... Binary orbital plane is oriented so that the two stars pass in front of one another as seen from Earth. The light curve is rich in information about the two stars. ...
... Binary orbital plane is oriented so that the two stars pass in front of one another as seen from Earth. The light curve is rich in information about the two stars. ...
red shift blue shift
... Know the relationship between apparent magnitude (m), absolute magnitude (M) and distance (D): ...
... Know the relationship between apparent magnitude (m), absolute magnitude (M) and distance (D): ...
Cygnus X-1
Cygnus X-1 (abbreviated Cyg X-1) is a well-known galactic X-ray source, thought to be a black hole, in the constellation Cygnus. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources seen from Earth, producing a peak X-ray flux density of 6977229999999999999♠2.3×10−23 Wm−2 Hz−1 (7003230000000000000♠2.3×103 Jansky). Cygnus X-1 was the first X-ray source widely accepted to be a black hole and it remains among the most studied astronomical objects in its class. The compact object is now estimated to have a mass about 14.8 times the mass of the Sun and has been shown to be too small to be any known kind of normal star, or other likely object besides a black hole. If so, the radius of its event horizon is about 7004440000000000000♠44 km.Cygnus X-1 belongs to a high-mass X-ray binary system about 7019574266339685654♠6070 ly from the Sun that includes a blue supergiant variable star designated HDE 226868 which it orbits at about 0.2 AU, or 20% of the distance from the Earth to the Sun. A stellar wind from the star provides material for an accretion disk around the X-ray source. Matter in the inner disk is heated to millions of degrees, generating the observed X-rays. A pair of jets, arranged perpendicular to the disk, are carrying part of the energy of the infalling material away into interstellar space.This system may belong to a stellar association called Cygnus OB3, which would mean that Cygnus X-1 is about five million years old and formed from a progenitor star that had more than 7001400000000000000♠40 solar masses. The majority of the star's mass was shed, most likely as a stellar wind. If this star had then exploded as a supernova, the resulting force would most likely have ejected the remnant from the system. Hence the star may have instead collapsed directly into a black hole.Cygnus X-1 was the subject of a friendly scientific wager between physicists Stephen Hawking and Kip Thorne in 1975, with Hawking betting that it was not a black hole. He conceded the bet in 1990 after observational data had strengthened the case that there was indeed a black hole in the system. This hypothesis has not been confirmed due to a lack of direct observation but has generally been accepted from indirect evidence.