Foundation 1 - Discovering Astronomy
... 1: State the Stefan-Boltzmann law and Wien’s law and explain their meaning in the context of blackbody radiation and temperature determination. 2: Describe the evidence for the particle nature of light and indicate how the energy per photon is related to the wavelength and frequency in the wave mode ...
... 1: State the Stefan-Boltzmann law and Wien’s law and explain their meaning in the context of blackbody radiation and temperature determination. 2: Describe the evidence for the particle nature of light and indicate how the energy per photon is related to the wavelength and frequency in the wave mode ...
Seasons On Earth Notes
... • During winter in the Northern Hemisphere (we are tilted away from the sun) shadows point north at solar noon. • During summer in the Northern Hemisphere shadows are shortest at solar noon. ...
... • During winter in the Northern Hemisphere (we are tilted away from the sun) shadows point north at solar noon. • During summer in the Northern Hemisphere shadows are shortest at solar noon. ...
PHYS 1311: In Class Problems Chapter 5 Solutions Feb. 23, 2016
... estimate, the true center of mass of the Solar System is close to this result. What does this mean? The planets do NOT orbit about the center of the Sun. They orbit about the center of mass of the Solar System. Likewise, the Sun orbits about the Solar System center of mass, but with a period nearly ...
... estimate, the true center of mass of the Solar System is close to this result. What does this mean? The planets do NOT orbit about the center of the Sun. They orbit about the center of mass of the Solar System. Likewise, the Sun orbits about the Solar System center of mass, but with a period nearly ...
HR Diagram of a Star Cluster
... A true Hertzsprung-Russell diagram is an XY plot of absolute magnitude vs. temperature (or equivalently, color or spectral class). We will assume that every one of the stars on this photograph is a member of the cluster NGC 6819 and so we will assume that they all lie at about the same distance from ...
... A true Hertzsprung-Russell diagram is an XY plot of absolute magnitude vs. temperature (or equivalently, color or spectral class). We will assume that every one of the stars on this photograph is a member of the cluster NGC 6819 and so we will assume that they all lie at about the same distance from ...
AST101_lect_13
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) • The lifetime τ ~ M/L ~ M-2 (because L ~ M3) ...
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) • The lifetime τ ~ M/L ~ M-2 (because L ~ M3) ...
AST101 Lecture 13 The Lives of the Stars
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) • The lifetime τ ~ M/L ~ M-2 (because L ~ M3) • τ ranges from 4x106 years for O stars to ~1012 years ...
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) • The lifetime τ ~ M/L ~ M-2 (because L ~ M3) • τ ranges from 4x106 years for O stars to ~1012 years ...
Be Stars
... luminosity and temperature in stars. Based on temperature there are different spectral types stars can be classed into. The different spectral types that stars can be classified into are; O, B, A, F, G, K and M. O stars are the hottest, meaning the temperature of the types of stars in the diagram de ...
... luminosity and temperature in stars. Based on temperature there are different spectral types stars can be classed into. The different spectral types that stars can be classified into are; O, B, A, F, G, K and M. O stars are the hottest, meaning the temperature of the types of stars in the diagram de ...
kepler` s laws
... seventeen century, observations were made with the naked eye. Nonetheless, with great patience and ingenuity, astronomers were able to chart the motion of many stars and planets across the sky. Tycho Brahe, a Danish astronomer (1546-1601), was credited to have made very careful observations of the m ...
... seventeen century, observations were made with the naked eye. Nonetheless, with great patience and ingenuity, astronomers were able to chart the motion of many stars and planets across the sky. Tycho Brahe, a Danish astronomer (1546-1601), was credited to have made very careful observations of the m ...
HR Diagram Lab
... Purpose: In this lab we will investigate the relationship between the temperature, brightness and diameter of stars. Introduction The H-R Diagram is a tool that astronomers use to classify stars based on their luminosity, magnitude, temperature, spectral class and evolutionary stage. The H-R Diagram ...
... Purpose: In this lab we will investigate the relationship between the temperature, brightness and diameter of stars. Introduction The H-R Diagram is a tool that astronomers use to classify stars based on their luminosity, magnitude, temperature, spectral class and evolutionary stage. The H-R Diagram ...
Integrative Studies 410 Our Place in the Universe
... • Different quantities will change by different factors! • Typical example: how does the circumference, surface, volume of a sphere change when its radius changes? ...
... • Different quantities will change by different factors! • Typical example: how does the circumference, surface, volume of a sphere change when its radius changes? ...
Galaxy Far Far Away ppt
... By looking at the radial velocities of surrounding stars, we can estimate the Sun’s velocity to be about 220 km/s. It takes about 240 million years for the Sun to orbit the center of the galaxy! ...
... By looking at the radial velocities of surrounding stars, we can estimate the Sun’s velocity to be about 220 km/s. It takes about 240 million years for the Sun to orbit the center of the galaxy! ...
Practice Questions for Exam 3
... C. The Sun initially began generating energy through nuclear fusion as it formed, but today it generates energy primarily through the sunspot cycle. D. As the Sun was forming, gravitational contraction increased the Sun's temperature until the core become hot enough for nuclear fusion, which ever si ...
... C. The Sun initially began generating energy through nuclear fusion as it formed, but today it generates energy primarily through the sunspot cycle. D. As the Sun was forming, gravitational contraction increased the Sun's temperature until the core become hot enough for nuclear fusion, which ever si ...
Sample pages 2 PDF
... (such as our own sun and lighter stars) the nuclear ‘burning’ associated with the combination of atomic nuclei only continues up to the formation iron and then stops (The fusion reactions occurring in stars are summarized in Fig. 2.2). The star then dies slowly and in a relatively uneventful way as ...
... (such as our own sun and lighter stars) the nuclear ‘burning’ associated with the combination of atomic nuclei only continues up to the formation iron and then stops (The fusion reactions occurring in stars are summarized in Fig. 2.2). The star then dies slowly and in a relatively uneventful way as ...
Final Exam - Practice questions for Unit V
... _____ 6. Why would we not expect to see complex life around a star half the mass of the Sun and believed to be one of the oldest stars in the Galaxy? a. b. c. d. e. ...
... _____ 6. Why would we not expect to see complex life around a star half the mass of the Sun and believed to be one of the oldest stars in the Galaxy? a. b. c. d. e. ...
Lecture 42
... stars, of which the star T-Tauri (now known to be a binary pair) is the type example. During this phase, a visible star begins to emerge from its cocoon of gas and dust, but it remains surrounded by its circumstellar disk. The luminosity is due entirely to continued accretion and gravitational colla ...
... stars, of which the star T-Tauri (now known to be a binary pair) is the type example. During this phase, a visible star begins to emerge from its cocoon of gas and dust, but it remains surrounded by its circumstellar disk. The luminosity is due entirely to continued accretion and gravitational colla ...
Measuring the ligth
... the scale match the Hipparcos model). The magnitude is hence, closely related to the flux. If a star has a very high magnitude, i.e. it is very weak, it’s due to it’s distance or because the star is intrinsically weak. In order to compare stars we define the absolute magnitude, <>, as the magnitu ...
... the scale match the Hipparcos model). The magnitude is hence, closely related to the flux. If a star has a very high magnitude, i.e. it is very weak, it’s due to it’s distance or because the star is intrinsically weak. In order to compare stars we define the absolute magnitude, <
Answer - Brock physics
... compressed and heated, and eventually resulting in an explosion. (d) matter from a nearby star falling onto the surface of a neutron star, becoming compressed and heated, and eventually resulting in an explosion. 17. A type II supernova occurs because of (a) * the core collapse of a high-mass star. ...
... compressed and heated, and eventually resulting in an explosion. (d) matter from a nearby star falling onto the surface of a neutron star, becoming compressed and heated, and eventually resulting in an explosion. 17. A type II supernova occurs because of (a) * the core collapse of a high-mass star. ...
Maybe We Are Alone in the Universe, After All
... rich in metals, and even then, only in their inner regions. In contrast, elliptical and irregular galaxies, he said, are barren. ''Lower metal abundance means you can't make a planet as big as the Earth,'' Dr. Brownlee said. ''It seems like something a lot of people don't want to hear.'' The scienti ...
... rich in metals, and even then, only in their inner regions. In contrast, elliptical and irregular galaxies, he said, are barren. ''Lower metal abundance means you can't make a planet as big as the Earth,'' Dr. Brownlee said. ''It seems like something a lot of people don't want to hear.'' The scienti ...
Sky Science Review for Test Part A
... 12 hours of day and night occur on ___________________ and __________________ The Northern hemisphere has more daylight hours in which season? ______________________ The Southern hemisphere has more daylight hours in which season? ___________________ Describe the angle of the Sun for each season. Ho ...
... 12 hours of day and night occur on ___________________ and __________________ The Northern hemisphere has more daylight hours in which season? ______________________ The Southern hemisphere has more daylight hours in which season? ___________________ Describe the angle of the Sun for each season. Ho ...
pptx
... • During this reaction, a small amount of the matter in the original protons is transformed into energy. As a result, the mass of the 1 helium nucleus is slightly less than the mass of the original 4 protons. Einstein’s equation E=mc2 tells us how much energy is produced from the transformed matter. ...
... • During this reaction, a small amount of the matter in the original protons is transformed into energy. As a result, the mass of the 1 helium nucleus is slightly less than the mass of the original 4 protons. Einstein’s equation E=mc2 tells us how much energy is produced from the transformed matter. ...
Exam 3 Study Guide
... question for these topics! What are three properties that distinguish elliptical galaxies from spiral galaxies? Spiral galaxies have spiral arms, gas, and young stars. Elliptical galaxies do not have arms, or a disk like structure, are mostly older stars, and contain very little gas. How do spiral g ...
... question for these topics! What are three properties that distinguish elliptical galaxies from spiral galaxies? Spiral galaxies have spiral arms, gas, and young stars. Elliptical galaxies do not have arms, or a disk like structure, are mostly older stars, and contain very little gas. How do spiral g ...
Model of Stars—5 Oct Outline •
... congratulation s. • If you got less than 10, you need to identify what went wrong. ...
... congratulation s. • If you got less than 10, you need to identify what went wrong. ...
handout
... Imagine building a scale model of the nearby stars, with the nearest star, Alpha Centauri, placed 100 yards away. Sirius, the Dog Star, is about 200 yards away. The bright stars of the Big Dipper hover a Eris Pluto mile above our heads. (In the real world, they’re Neptune about 4, 8, and 70 light ye ...
... Imagine building a scale model of the nearby stars, with the nearest star, Alpha Centauri, placed 100 yards away. Sirius, the Dog Star, is about 200 yards away. The bright stars of the Big Dipper hover a Eris Pluto mile above our heads. (In the real world, they’re Neptune about 4, 8, and 70 light ye ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.