Astronomy and Space Science
... For the Sun, the absolute magnitude is 4.8 and luminosity is 3.83×1026W. We have M = 71.3 - 2.5 log10(L), where L is in W. More: Using this and earlier formulae, we can see how the physical quantities m, d, M, L, R, T are related. Both m and T are directly measurable, but d has to be obtained from o ...
... For the Sun, the absolute magnitude is 4.8 and luminosity is 3.83×1026W. We have M = 71.3 - 2.5 log10(L), where L is in W. More: Using this and earlier formulae, we can see how the physical quantities m, d, M, L, R, T are related. Both m and T are directly measurable, but d has to be obtained from o ...
Death of Massive Stars
... • 1905: Einstein publishes special theory of relativity • 1915: Einstein publishes general theory of relativity ...
... • 1905: Einstein publishes special theory of relativity • 1915: Einstein publishes general theory of relativity ...
5. Universal Laws of Motion
... Newton’s first law of motion: An object moves at constant velocity unless a net force acts to change its speed ...
... Newton’s first law of motion: An object moves at constant velocity unless a net force acts to change its speed ...
Solutions
... the conversion of mass to energy in the core. If the luminosity goes up, the rate of conversion of mass must go up. (The reason fusion is faster in the core is that it has become compressed relative to the core of the main sequence star; the hotter and denser core allows for faster fusion.) Note: a ...
... the conversion of mass to energy in the core. If the luminosity goes up, the rate of conversion of mass must go up. (The reason fusion is faster in the core is that it has become compressed relative to the core of the main sequence star; the hotter and denser core allows for faster fusion.) Note: a ...
ppt
... (albedo) A small fraction goes into direct heating of the atmosphere itself rather than the planet Remainder reaches Earth’s surface and heats it up Earth reradiates at infrared wavelengths which is strongly absorbed and reradiated back towards the Earth A small fraction of the IR emission from the ...
... (albedo) A small fraction goes into direct heating of the atmosphere itself rather than the planet Remainder reaches Earth’s surface and heats it up Earth reradiates at infrared wavelengths which is strongly absorbed and reradiated back towards the Earth A small fraction of the IR emission from the ...
class 1,S11
... • How did we come to be? —The matter in our bodies came from the Big Bang, which produced hydrogen and helium. —All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How can we know what the universe was like in the past? • ...
... • How did we come to be? —The matter in our bodies came from the Big Bang, which produced hydrogen and helium. —All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How can we know what the universe was like in the past? • ...
WHAT IS A LIGHT
... x 60 min/hr x 24 hr/day x 365 days/year or: • In one year light can travel about 9.46 trillion kilometers (that is 9,460,000,000,000 kilometers or 5,880,000,000,000 miles) ...
... x 60 min/hr x 24 hr/day x 365 days/year or: • In one year light can travel about 9.46 trillion kilometers (that is 9,460,000,000,000 kilometers or 5,880,000,000,000 miles) ...
Monday, Sept. 8 - University of Manitoba Physics Department
... Re-arrange the equation so the calculated parameter is on the ...
... Re-arrange the equation so the calculated parameter is on the ...
Read
... The Hertzsprung-Russell diagram is an important tool in the study of stars. In the early 1900’s the two astronomers investigated nearby stars and found a relationship between their color and brightness. This work lead to the important discovery that the brightness of a star is related to the tempera ...
... The Hertzsprung-Russell diagram is an important tool in the study of stars. In the early 1900’s the two astronomers investigated nearby stars and found a relationship between their color and brightness. This work lead to the important discovery that the brightness of a star is related to the tempera ...
Solar System
... Ganymede is the largest moon of Jupiter and the largest moon in the entire solar system. It is composed of rock and water ice, and it has craters and possible earthquakes. Callisto is the most heavily cratered object in the solar system. It has a huge bull’s-eye crater called Valhalla, and its surfa ...
... Ganymede is the largest moon of Jupiter and the largest moon in the entire solar system. It is composed of rock and water ice, and it has craters and possible earthquakes. Callisto is the most heavily cratered object in the solar system. It has a huge bull’s-eye crater called Valhalla, and its surfa ...
Habitability: Good, Bad and the Ugly
... Luminosity of the Sun • Definition of luminosity (watts/m2) • Sun’s luminosity has been changing: earlier in its evolution, luminosity was only 70% of what it is today (how could temperature be maintained over geological time) • Future for luminosity – Remember star sequence from lab and lecture – ...
... Luminosity of the Sun • Definition of luminosity (watts/m2) • Sun’s luminosity has been changing: earlier in its evolution, luminosity was only 70% of what it is today (how could temperature be maintained over geological time) • Future for luminosity – Remember star sequence from lab and lecture – ...
File
... Reading Skills Read the passage below. Then, answer questions 8-10. Movement of the Planets Imagine that it is the year 200 BCE and that you are an apprentice to a famous Greek astronomer. After many years of observing the sky, the astronomer knows all of the constellations as well as he knows the b ...
... Reading Skills Read the passage below. Then, answer questions 8-10. Movement of the Planets Imagine that it is the year 200 BCE and that you are an apprentice to a famous Greek astronomer. After many years of observing the sky, the astronomer knows all of the constellations as well as he knows the b ...
Solution
... the red one must be smaller. But by Stefan-Boltzmann's Law, its luminosity/area must also be smaller, and they are the same size. So the red one is less luminous. 3. ( T F ) Using parallax, astronomers can now reliably measure the distance of most of the stars in our galaxy. False. Sad to say, most ...
... the red one must be smaller. But by Stefan-Boltzmann's Law, its luminosity/area must also be smaller, and they are the same size. So the red one is less luminous. 3. ( T F ) Using parallax, astronomers can now reliably measure the distance of most of the stars in our galaxy. False. Sad to say, most ...
1 - Uplift North Hills Prep
... ● density at which universe will expand forever but rate of expansion will approach zero / the density at which the universe will begin to contract after infinite amount of time / the density for which the curvature of the universe is zero ...
... ● density at which universe will expand forever but rate of expansion will approach zero / the density at which the universe will begin to contract after infinite amount of time / the density for which the curvature of the universe is zero ...
New findings show magnetic organization of the Sun
... of the 19th century, Weber launched an effort to account for the anomalous advance of the perihelion of Mercury, by applying the Ampère correction to Newton’s inverse square law. As is well known, this advance of Mercury’s perihelion has become the experimental cornerstone of Einstein’s Theory of G ...
... of the 19th century, Weber launched an effort to account for the anomalous advance of the perihelion of Mercury, by applying the Ampère correction to Newton’s inverse square law. As is well known, this advance of Mercury’s perihelion has become the experimental cornerstone of Einstein’s Theory of G ...
Document
... ● density at which universe will expand forever but rate of expansion will approach zero / the density at which the universe will begin to contract after infinite amount of time / the density for which the curvature of the universe is zero ...
... ● density at which universe will expand forever but rate of expansion will approach zero / the density at which the universe will begin to contract after infinite amount of time / the density for which the curvature of the universe is zero ...
Week 4
... Sun, the faster it goes. • The square of the orbital period is proportional to the cube of its semi-major axis: P2 = a3. (P is how long it takes to make one orbit in years. a is distance in AU) ...
... Sun, the faster it goes. • The square of the orbital period is proportional to the cube of its semi-major axis: P2 = a3. (P is how long it takes to make one orbit in years. a is distance in AU) ...
chapter 7
... result of the Earth's revolution. Half of this angle is the parallax, p. (Read the introduction to Ex. 17.0 on stellar parallax in the course manual in addition to the assigned reading in the text). In reality, the displacement of nearby stars as a result of the Earth’s orbital motion is more compl ...
... result of the Earth's revolution. Half of this angle is the parallax, p. (Read the introduction to Ex. 17.0 on stellar parallax in the course manual in addition to the assigned reading in the text). In reality, the displacement of nearby stars as a result of the Earth’s orbital motion is more compl ...
Could there be life on exoplanets? No room for complacency
... planet by one or more larger planets in exterior orbits. By implication, the orbit of the larger planet must have a semi-major axis at least as large as 2 AU and preferably rather larger. With the solar system in mind, interest now is with companions of this semi-major axis and of mass broadly compa ...
... planet by one or more larger planets in exterior orbits. By implication, the orbit of the larger planet must have a semi-major axis at least as large as 2 AU and preferably rather larger. With the solar system in mind, interest now is with companions of this semi-major axis and of mass broadly compa ...