Sky Watching Talk
... direction from Earth, BUT …. Each has its own different distance from the Earth – Therefore, NOT grouped together is space ...
... direction from Earth, BUT …. Each has its own different distance from the Earth – Therefore, NOT grouped together is space ...
1 WHY DO THE STARS IN ORION LOOK SO DIFFERENT FROM
... having the same temperature and size will be the same magnitude if both are equidistance. But if one star is considerably larger, it will be brighter. In the same respect, if the much larger star is farther away, then it is possible for the two stars to appear to have the same brightness [The Facts ...
... having the same temperature and size will be the same magnitude if both are equidistance. But if one star is considerably larger, it will be brighter. In the same respect, if the much larger star is farther away, then it is possible for the two stars to appear to have the same brightness [The Facts ...
parallax in arc seconds
... Proxima Centauri. It is a member of a triple star system called the Alpha Centauri System. Proxima Centauri has the largest known stellar parallax at 0.76”. ...
... Proxima Centauri. It is a member of a triple star system called the Alpha Centauri System. Proxima Centauri has the largest known stellar parallax at 0.76”. ...
FSA school wide Science Olympiad 12/8/2007
... 2. If you look into a sky-chart, you'll probably come across several objects with funny-looking names consisting of the capital letter "M" followed by a number. For example, the Pleiades star-cluster in Taurus is labeled "M45", and "M13" is the labelling for the Hercules Globular Cluster. And so it ...
... 2. If you look into a sky-chart, you'll probably come across several objects with funny-looking names consisting of the capital letter "M" followed by a number. For example, the Pleiades star-cluster in Taurus is labeled "M45", and "M13" is the labelling for the Hercules Globular Cluster. And so it ...
Unit 6--Astronomy
... d. sunspots 15.By observing sunspots, Galileo concluded that the sun ____. a. was dying c. rotated on its axis ...
... d. sunspots 15.By observing sunspots, Galileo concluded that the sun ____. a. was dying c. rotated on its axis ...
Chapter 17 Measuring the Stars
... Measuring Stellar Masses in Binary Stars In order to measure stellar masses in a binary star, the period and semimajor axis of the orbit must be measured. Once this is done, Kepler’s third law gives the sum of the masses of the two stars. Then the relative speeds of the two stars can be measured usi ...
... Measuring Stellar Masses in Binary Stars In order to measure stellar masses in a binary star, the period and semimajor axis of the orbit must be measured. Once this is done, Kepler’s third law gives the sum of the masses of the two stars. Then the relative speeds of the two stars can be measured usi ...
ASTR101 Unit 10 Assessment Answer Key 1. Mass, luminosity, size
... 1,000,000 to 1/10,000 solar luminosities, in radius from about 1,000 to 1/10 solar radii, in surface temperature from about 35,000 to 3,000 K, and in age, from about 13 billion years to stars that are just now being born. 2. Luminosity is the amount of energy the star emits per second while apparent ...
... 1,000,000 to 1/10,000 solar luminosities, in radius from about 1,000 to 1/10 solar radii, in surface temperature from about 35,000 to 3,000 K, and in age, from about 13 billion years to stars that are just now being born. 2. Luminosity is the amount of energy the star emits per second while apparent ...
Stellar Evolution Test Answers
... 1. When the light from a distant galaxy is distorted by a black hole, the resulting image is a ring. We call this a) the photon sphere b) the event horizon c) gravitational lensing d) the cosmological principle 2. Once you cross the ____________________, there is no going back…light can no longer es ...
... 1. When the light from a distant galaxy is distorted by a black hole, the resulting image is a ring. We call this a) the photon sphere b) the event horizon c) gravitational lensing d) the cosmological principle 2. Once you cross the ____________________, there is no going back…light can no longer es ...
Powerpoint Presentation (large file)
... 9. Why are binary star systems important in astronomy? 10.How can a star’s spectrum show whether it is actually a binary star system? 11.What do astronomers learn from stars that eclipse each other? ...
... 9. Why are binary star systems important in astronomy? 10.How can a star’s spectrum show whether it is actually a binary star system? 11.What do astronomers learn from stars that eclipse each other? ...
The correct answers are written in bold, italic and underlined. The
... • At the very bottom of the main sequence, massive stars being cool because of their great mass • At the very top of the main sequence, massive stars being very hot and active • In the middle of the main sequence, with very hot but less massive stars positioned higher and massive red giant stars pos ...
... • At the very bottom of the main sequence, massive stars being cool because of their great mass • At the very top of the main sequence, massive stars being very hot and active • In the middle of the main sequence, with very hot but less massive stars positioned higher and massive red giant stars pos ...
LAB: Star Classification
... stars known so far, with a temperature of 200,000º K at its surface. Stars of intermediate mass (1-8 solar masses) terminate their life as an Earth-sized white dwarf after the exhaustion of their nuclear fuel. During the transition from a nuclear-burning star to the white dwarf stage, the star becom ...
... stars known so far, with a temperature of 200,000º K at its surface. Stars of intermediate mass (1-8 solar masses) terminate their life as an Earth-sized white dwarf after the exhaustion of their nuclear fuel. During the transition from a nuclear-burning star to the white dwarf stage, the star becom ...
14_creationism
... be just right to allow intelligent life. The origin of life. This is such an extraordinary event and “achievement”. Perhaps life is so complex that the origin of life is a lot less likely than we think. This is testable. As we search the universe we may be unlikely to find even primitive life. The o ...
... be just right to allow intelligent life. The origin of life. This is such an extraordinary event and “achievement”. Perhaps life is so complex that the origin of life is a lot less likely than we think. This is testable. As we search the universe we may be unlikely to find even primitive life. The o ...
Characterizing Stars - Department of Physics and Astronomy
... 1. How far away are the stars? 2. What evidence do astronomers have that the Sun is a typical star? 3. What is meant by a “first-magnitude” or “second magnitude” star? 4. Why are some stars red and others blue? 5. What are the stars made of? 6. As stars go, is our Sun especially large or small? 7. W ...
... 1. How far away are the stars? 2. What evidence do astronomers have that the Sun is a typical star? 3. What is meant by a “first-magnitude” or “second magnitude” star? 4. Why are some stars red and others blue? 5. What are the stars made of? 6. As stars go, is our Sun especially large or small? 7. W ...
What is a star?
... What is a star? • Stars have different sizes, ranging from 1/100 the size of the sun to 1,000 times the size of the sun. • Two or more stars may be bound together by gravity, which causes them to orbit each other. • Three or more stars that are bound by gravity are called multiple stars or multiple ...
... What is a star? • Stars have different sizes, ranging from 1/100 the size of the sun to 1,000 times the size of the sun. • Two or more stars may be bound together by gravity, which causes them to orbit each other. • Three or more stars that are bound by gravity are called multiple stars or multiple ...
Star in a Box Worksheet - Beginning
... radius of the Sun and its temperature is about 8000 K. Betelgeuse has 1000 times the radius of the Sun and its temperature is about 3500 K. Select a star with 20x the mass of the Sun and run the animation, use this to find: 1. What stages of their lives the two stars are in. 2. How long each star ha ...
... radius of the Sun and its temperature is about 8000 K. Betelgeuse has 1000 times the radius of the Sun and its temperature is about 3500 K. Select a star with 20x the mass of the Sun and run the animation, use this to find: 1. What stages of their lives the two stars are in. 2. How long each star ha ...
Wednesday, November 7, 2007
... So they are brightest and easiest to discover when young. Have been discovered mainly in star forming regions. Also sometimes found in binary star systems. ...
... So they are brightest and easiest to discover when young. Have been discovered mainly in star forming regions. Also sometimes found in binary star systems. ...
The Sun and the Stars
... 4) transit of Venus (Halley 1716) Edmund Halley in 1716 suggested that the transit of Venus could be used to provide an accurate estimate of the Earth-Sun distance. Transits occur when the planet passes between the Earth and Sun. NB. Transits of Venus are rare, because the orbit of Venus is inclined ...
... 4) transit of Venus (Halley 1716) Edmund Halley in 1716 suggested that the transit of Venus could be used to provide an accurate estimate of the Earth-Sun distance. Transits occur when the planet passes between the Earth and Sun. NB. Transits of Venus are rare, because the orbit of Venus is inclined ...
Distance measures - ScienceEducationatNewPaltz
... By measuring the parallax angle for a star, astronomers can then directly determine its distance. In reality it is not quite so simple for several reasons. The angle of parallax for even the closest stars is always < 1.0 arcsec so careful observation and precision is required. Corrections have to be ...
... By measuring the parallax angle for a star, astronomers can then directly determine its distance. In reality it is not quite so simple for several reasons. The angle of parallax for even the closest stars is always < 1.0 arcsec so careful observation and precision is required. Corrections have to be ...
The Galactic Halo The Galactic Disk Height and Thickness of MW
... " Imagine moving this OB association to larger and larger ...
... " Imagine moving this OB association to larger and larger ...
Quick facts #2: The two
... The most straightforward orbit calculations occur when the central body is much more massive than the orbiting body, as is the case for the orbits of man-made satellites around the Earth. We assumed that this is also the case for planetary orbits about the Sun – a good approximation, especially for ...
... The most straightforward orbit calculations occur when the central body is much more massive than the orbiting body, as is the case for the orbits of man-made satellites around the Earth. We assumed that this is also the case for planetary orbits about the Sun – a good approximation, especially for ...
Final review - Physics and Astronomy
... In 1920's, Hubble used Cepheids to find distances to galaxies. Showed that redshift or recessional velocity is proportional to distance: ...
... In 1920's, Hubble used Cepheids to find distances to galaxies. Showed that redshift or recessional velocity is proportional to distance: ...
III - National Optical Astronomy Observatory
... explain that in addition to using ccd images, they have taken spectra of hundreds of stars. In OBSERVATIONS AND DATA REDUCTION they present a detailed explanation of every step of their work. The first sentence, “UBV photometry was obtained…” tells others that they took ccd images through 3 filters ...
... explain that in addition to using ccd images, they have taken spectra of hundreds of stars. In OBSERVATIONS AND DATA REDUCTION they present a detailed explanation of every step of their work. The first sentence, “UBV photometry was obtained…” tells others that they took ccd images through 3 filters ...
Place in Space
... distance that light can travel in one year. In one year light travels about 9,460,000,000,000 kilometres. So, this distance is 1 lightyear. ...
... distance that light can travel in one year. In one year light travels about 9,460,000,000,000 kilometres. So, this distance is 1 lightyear. ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.