light energy
... • Distances can be deceiving: Bright stars look close, but may be very far away Star Approx. Distance (LY) P. Centari ...
... • Distances can be deceiving: Bright stars look close, but may be very far away Star Approx. Distance (LY) P. Centari ...
Scientific Methods
... The term "error" signifies a deviation of the result from some "true" value. Often we cannot know what the true value is, and we can determine only estimates of the errors inherent in the experiment. If we repeat the experiment, the results may differ from those of the first attempt. We can express ...
... The term "error" signifies a deviation of the result from some "true" value. Often we cannot know what the true value is, and we can determine only estimates of the errors inherent in the experiment. If we repeat the experiment, the results may differ from those of the first attempt. We can express ...
Powers Of Ten
... From this distance, all the galaxies look small with inmense empty spaces in between. The same laws are ruling in all bodies of the Universe. We could continue traveling upwards with our imagination, but now we will return home quickly ...
... From this distance, all the galaxies look small with inmense empty spaces in between. The same laws are ruling in all bodies of the Universe. We could continue traveling upwards with our imagination, but now we will return home quickly ...
Teacher`s Show Guide
... label it "Sun." Discuss how we see the band of faint starlight in our sky that we call the Milky Way given our Sun's position in the galaxy. Explain how all the stars we can see in the night sky are members of this galaxy and that there are countless other galaxies. The central nucleus may be labele ...
... label it "Sun." Discuss how we see the band of faint starlight in our sky that we call the Milky Way given our Sun's position in the galaxy. Explain how all the stars we can see in the night sky are members of this galaxy and that there are countless other galaxies. The central nucleus may be labele ...
SSG Coordinators will be at the Cronan Ranch observing site at 5
... scopes in the 4” range under medium to high magnification may glimpse a faint dust lane and some surface mottling. Cassiopeia (S&T Pocket Sky Atlas – pg 1 – 3) This constellation is one of the most recognized in the sky due to its prominent M (or W) asterism. Cassiopeia is also a circumpolar constel ...
... scopes in the 4” range under medium to high magnification may glimpse a faint dust lane and some surface mottling. Cassiopeia (S&T Pocket Sky Atlas – pg 1 – 3) This constellation is one of the most recognized in the sky due to its prominent M (or W) asterism. Cassiopeia is also a circumpolar constel ...
ppp
... be sucked into the center of the galaxy • The direction of the velocity should also be tangential to the desired orbit ...
... be sucked into the center of the galaxy • The direction of the velocity should also be tangential to the desired orbit ...
Lecture 29 - Empyrean Quest Publishers
... Harlow Shapley 1917--We are not at the center of the disk. Globular clusters orbit galactic center, sun 2/3rds way out. He used proper motions of Cepheids-->Distance (11 stars). Shapley-Curtis debate 1920--Nebulae are within our island universe (Shapley). Nebulae may be other galaxies (Curtis). Edwi ...
... Harlow Shapley 1917--We are not at the center of the disk. Globular clusters orbit galactic center, sun 2/3rds way out. He used proper motions of Cepheids-->Distance (11 stars). Shapley-Curtis debate 1920--Nebulae are within our island universe (Shapley). Nebulae may be other galaxies (Curtis). Edwi ...
Exam 3 Study Guide
... conservation of angular momentum. The spiral arms form when gas clouds are squeezed, trigging star formation, these stars then flow out of the arms, making the structure of the arms. How do elliptical galaxies form? A protogalactic cloud that has enough density to quickly form stars will use up gas ...
... conservation of angular momentum. The spiral arms form when gas clouds are squeezed, trigging star formation, these stars then flow out of the arms, making the structure of the arms. How do elliptical galaxies form? A protogalactic cloud that has enough density to quickly form stars will use up gas ...
1” “Sky-Notes” of the Open University Astronomy Club. October 2005
... month occur on the 17th and 20th. Delta () Cephei. +3.5 to +4.4, period 5.37 days. The prototype for the Cepheid class of variable stars. Their period-luminosity relationship has lead them to being used as “standard candles” in measuring distances to nearby galaxies. Maximum brightness occurs on 6t ...
... month occur on the 17th and 20th. Delta () Cephei. +3.5 to +4.4, period 5.37 days. The prototype for the Cepheid class of variable stars. Their period-luminosity relationship has lead them to being used as “standard candles” in measuring distances to nearby galaxies. Maximum brightness occurs on 6t ...
July - astra
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
Galaxies Powerpoint
... What is a galaxy? • A galaxy is a large grouping of stars, gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the ...
... What is a galaxy? • A galaxy is a large grouping of stars, gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the ...
Main Types of Galaxies
... What is a galaxy? • A galaxy is a large grouping of stars, gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the ...
... What is a galaxy? • A galaxy is a large grouping of stars, gas, and dust in space that are held together by gravity. • The largest galaxies contain more than a trillion stars. Smaller galaxies may have only a few million. • Scientists estimate the number of stars from the size and brightness of the ...
Useful equations - Department of Physics and Astronomy
... the 14C concentration and decay rate measured for the remains, today, a time t since the organism died. Concentration is usually measured with a mass spectrometer, like isotope concentrations in the usual age-dating experiments. Decay rate can be measured more easily in large samples with a Geiger c ...
... the 14C concentration and decay rate measured for the remains, today, a time t since the organism died. Concentration is usually measured with a mass spectrometer, like isotope concentrations in the usual age-dating experiments. Decay rate can be measured more easily in large samples with a Geiger c ...
The Milky Way - Clive Gifford
... 3-minute mission: count the stars Let’s assume that there are 200 billion stars in the Milky Way – that’s 200,000,000,000! How many years would it take to count them all, assuming you can count a star every second? Tips: 1. Use a calculator. Work out how many stars you could count in a day. 2. Multi ...
... 3-minute mission: count the stars Let’s assume that there are 200 billion stars in the Milky Way – that’s 200,000,000,000! How many years would it take to count them all, assuming you can count a star every second? Tips: 1. Use a calculator. Work out how many stars you could count in a day. 2. Multi ...
13 The Family of Stars
... The binary separation a cannot be measured directly because the stars are too close to each other. However, in spectroscopic binaries, the stars show Doppler shifts from the radial velocities of the two stars. By measuring these Doppler shifts we can determine a limit on the separation and thus the ...
... The binary separation a cannot be measured directly because the stars are too close to each other. However, in spectroscopic binaries, the stars show Doppler shifts from the radial velocities of the two stars. By measuring these Doppler shifts we can determine a limit on the separation and thus the ...
Earth Science Unit Test Review
... 2. What are star clusters? What types occur? 3. Explain the difference between an open cluster and globular cluster. 4. What are binary stars? How do we locate binary stars? 5. How does the Doppler effect ...
... 2. What are star clusters? What types occur? 3. Explain the difference between an open cluster and globular cluster. 4. What are binary stars? How do we locate binary stars? 5. How does the Doppler effect ...
STARS
... • An enormous explosion when a large star dies. • When all the hydrogen is used up the core collapses • The absence of pressure causes a neutron star or a black hole. • The explosion can be bright enough to see during the day! ...
... • An enormous explosion when a large star dies. • When all the hydrogen is used up the core collapses • The absence of pressure causes a neutron star or a black hole. • The explosion can be bright enough to see during the day! ...
Appendix 2
... galaxies. Observation shows that overall movement of the galaxies is to move away from each other. The speed of any two galaxies is greater the further they are apart. This is understood to be the result of space expanding. Working backwards in time it is thought that all the matter of which the pre ...
... galaxies. Observation shows that overall movement of the galaxies is to move away from each other. The speed of any two galaxies is greater the further they are apart. This is understood to be the result of space expanding. Working backwards in time it is thought that all the matter of which the pre ...
Stellar Astronomy Unit 3 Key Terms and Matching Definitions _____
... _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ ...
... _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ ...
The Universe
... Nuclear Fusion – Two atoms are pushed together so hard they ‘fuse’ into one and create a different element ...
... Nuclear Fusion – Two atoms are pushed together so hard they ‘fuse’ into one and create a different element ...
Review
... B) The gas planets are farther from the Sun than the four inner planets C) All the planets orbit in the same direction D) The orbits of Pluto and the other distant dwarf planets are tilted in different directions. 30) Planets orbiting other stars are hard to detect because they A) only reflect light ...
... B) The gas planets are farther from the Sun than the four inner planets C) All the planets orbit in the same direction D) The orbits of Pluto and the other distant dwarf planets are tilted in different directions. 30) Planets orbiting other stars are hard to detect because they A) only reflect light ...
SECTION 30.2 Measuring the Stars 1. Constellations are a. the
... 5. When estimating the distance of stars from Earth, astronomers use the fact that nearby stars shift in position as observed from Earth, which is called a. parsec. b. parallax. c. precision. d. shafting. 6. Ancient Greek classification system based on how bright a star appears to be is ___________. ...
... 5. When estimating the distance of stars from Earth, astronomers use the fact that nearby stars shift in position as observed from Earth, which is called a. parsec. b. parallax. c. precision. d. shafting. 6. Ancient Greek classification system based on how bright a star appears to be is ___________. ...
Pretest
... inner solar system, most gases escaped the gravity of planets forming in this region, causing the inner planets to be rocky. The outer solar system, being farther from the sun, was cooler. As a result, planets forming in this region were able to capture gases and so became gas giants. ...
... inner solar system, most gases escaped the gravity of planets forming in this region, causing the inner planets to be rocky. The outer solar system, being farther from the sun, was cooler. As a result, planets forming in this region were able to capture gases and so became gas giants. ...
PHYS 390 Lecture 31 - Kinematics of galaxies 31
... = 9.0 x 1010 solar masses. That the mass enclosed within Ro is about 1011 solar masses is at once both comforting and disturbing. Comforting, in that it is the correct order of magnitude, as the mass of visible matter in the Milky Way is about 1011 solar masses, as previously mentioned. However, not ...
... = 9.0 x 1010 solar masses. That the mass enclosed within Ro is about 1011 solar masses is at once both comforting and disturbing. Comforting, in that it is the correct order of magnitude, as the mass of visible matter in the Milky Way is about 1011 solar masses, as previously mentioned. However, not ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.