The magnitude scale, parallax, the parsec, and Cepheid distances
... More nega;ve = brighter (NB: this is counter-‐intui;ve, beware!) Typical range of Abs. mag: stars -‐1 to +10, galaxies -‐24 to -‐6 Typical range of app. mag: stars/galaxies, -‐27 (Sun) to +30 ( ...
... More nega;ve = brighter (NB: this is counter-‐intui;ve, beware!) Typical range of Abs. mag: stars -‐1 to +10, galaxies -‐24 to -‐6 Typical range of app. mag: stars/galaxies, -‐27 (Sun) to +30 ( ...
Concise pioneers of astronomy
... Christian Doppler was an Austrian mathematician who lived between 1803-1853. He is known for the principle he first proposed in concerning the colored light of double stars in 1842. This principle is now known as the Doppler effect. He hypothesized that the pitch of a sound would change if the sourc ...
... Christian Doppler was an Austrian mathematician who lived between 1803-1853. He is known for the principle he first proposed in concerning the colored light of double stars in 1842. This principle is now known as the Doppler effect. He hypothesized that the pitch of a sound would change if the sourc ...
Introduction to Basic Stargazing Part II - Naples Free-Net
... inclined, in popular news media. More commonly among professionals and hobbyists is the astronomical unit (au) – one au is defined as the average distance from Earth to the Sun. There are two reasons for this; 1. It greatly improves computational ease of raw data. 2. It improves comprehension of rel ...
... inclined, in popular news media. More commonly among professionals and hobbyists is the astronomical unit (au) – one au is defined as the average distance from Earth to the Sun. There are two reasons for this; 1. It greatly improves computational ease of raw data. 2. It improves comprehension of rel ...
Lecture 9: Post-main sequence evolution of stars Lifespan on the
... • What remains is a white dwarf star, in the lower left portion of the H-R diagram. ...
... • What remains is a white dwarf star, in the lower left portion of the H-R diagram. ...
Stargazing
... 9. Which would probably generate more light, a star that burns hydrogen quickly or a star that burns hydrogen slowly? ...
... 9. Which would probably generate more light, a star that burns hydrogen quickly or a star that burns hydrogen slowly? ...
MT 2 Answers Version A
... 52. In the figure below, the force of gravity is drawn in the picture. This represents Earth’s gravity pulling down on the man. According to Newton’s third law, what is the other half of this pair of forces? ...
... 52. In the figure below, the force of gravity is drawn in the picture. This represents Earth’s gravity pulling down on the man. According to Newton’s third law, what is the other half of this pair of forces? ...
MT 2 Answers Version D
... Luminosity is how bright the star appears to us; intrinsic brightness is how much light it emits. ...
... Luminosity is how bright the star appears to us; intrinsic brightness is how much light it emits. ...
MT 2 Answers Version C
... 41. Which of the following did NOT require the use of a telescope to observe? (a) ...
... 41. Which of the following did NOT require the use of a telescope to observe? (a) ...
bright - TutorPlus
... luminosity or absolute magnitude of a star and its surface temperature as deduced from its colour. • The diagram is called the Hertzsprung-Russell or H-R diagram and is used extensively by ...
... luminosity or absolute magnitude of a star and its surface temperature as deduced from its colour. • The diagram is called the Hertzsprung-Russell or H-R diagram and is used extensively by ...
Nebular theory
... The Nebular Theory – How did our Solar System form? Our theory about how the solar system formed is called the nebular theory. This activity will help you understand how we think the solar system formed. 1. Write your observations from the video that shows how the planets orbit the sun. Write at lea ...
... The Nebular Theory – How did our Solar System form? Our theory about how the solar system formed is called the nebular theory. This activity will help you understand how we think the solar system formed. 1. Write your observations from the video that shows how the planets orbit the sun. Write at lea ...
The Milky Way - 清華大學物理系歡迎頁 Welcome to
... B. The Evolution of Star Clusters IV. Evidence of Evolution: Variable Stars A. Cepheid and RR Lyrae Variable Stars B. Pulsating Stars C. Period Changes in Variable Stars ...
... B. The Evolution of Star Clusters IV. Evidence of Evolution: Variable Stars A. Cepheid and RR Lyrae Variable Stars B. Pulsating Stars C. Period Changes in Variable Stars ...
The Milky Way
... From the light curve of Algol, we can infer that the system contains two stars of very different surface temperature, orbiting in a slightly inclined plane. ...
... From the light curve of Algol, we can infer that the system contains two stars of very different surface temperature, orbiting in a slightly inclined plane. ...
H-R Diagram Lab
... information about them. Together, they created a diagram on which they mapped stars by magnitude and spectral class. After the astronomers had completed graphing the stars, they noticed that several patterns appeared. First, they noticed that ninety per cent of the stars fell along a diagonal line f ...
... information about them. Together, they created a diagram on which they mapped stars by magnitude and spectral class. After the astronomers had completed graphing the stars, they noticed that several patterns appeared. First, they noticed that ninety per cent of the stars fell along a diagonal line f ...
Document
... Pluto first discovered in 1930 by Clyde W. Tombaugh A full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit. Pluto has been demoted to be a “Dwar ...
... Pluto first discovered in 1930 by Clyde W. Tombaugh A full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit. Pluto has been demoted to be a “Dwar ...
PHYS 175 (2014) Final Examination Name: ___SOLUTION_____
... 19. William Herschel tried to locate the center of our Galaxy by counting the number of stars in different directions. This did not work because ...
... 19. William Herschel tried to locate the center of our Galaxy by counting the number of stars in different directions. This did not work because ...
constellations - Otterbein University
... - constellation shapes and names - star names and position in constellation - deep sky objects’ names and position • Quiz: You will be asked to find these objects on a star map. ...
... - constellation shapes and names - star names and position in constellation - deep sky objects’ names and position • Quiz: You will be asked to find these objects on a star map. ...
REACH FOR THE STARS MLK 2009
... star? The star is one parsec away. How many AU does light travel in one year? 63,900 What are Hayashi tracks? The lines on the HR which represent the path a star follows during its life. What causes a sun like star to suddenly contract in diameter? Termination of radiative pressure. How many times w ...
... star? The star is one parsec away. How many AU does light travel in one year? 63,900 What are Hayashi tracks? The lines on the HR which represent the path a star follows during its life. What causes a sun like star to suddenly contract in diameter? Termination of radiative pressure. How many times w ...
The Transfer Equation
... Teff = 4500 K. The two stars are of nearly equal V magnitude. What is the ratio of their fluxes at 2 microns? • In an eclipsing binary system, comprised of a B5V star at Teff = 16,000K and an F0III star at Teff = 7000K, the two stars are known to have nearly equal diameters. How deep will the primar ...
... Teff = 4500 K. The two stars are of nearly equal V magnitude. What is the ratio of their fluxes at 2 microns? • In an eclipsing binary system, comprised of a B5V star at Teff = 16,000K and an F0III star at Teff = 7000K, the two stars are known to have nearly equal diameters. How deep will the primar ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.