Integrative Studies 410 Our Place in the Universe
... • Heavier elements formed by nuclear fusion in stars and thrown into space by supernovae – Condense into new stars and planets – Elements heavier than iron form during supernovae explosions ...
... • Heavier elements formed by nuclear fusion in stars and thrown into space by supernovae – Condense into new stars and planets – Elements heavier than iron form during supernovae explosions ...
Basic Properties of Stars
... If the Doppler shift of a star’s absorption lines changes with time (redshift, then blueshift, then redshift, etc.), it’s a spectroscopic binary. If one star is much fainter than the other, you may not see its lines. The object is then a singleline spectroscopic binary. If both sets of lines are see ...
... If the Doppler shift of a star’s absorption lines changes with time (redshift, then blueshift, then redshift, etc.), it’s a spectroscopic binary. If one star is much fainter than the other, you may not see its lines. The object is then a singleline spectroscopic binary. If both sets of lines are see ...
Week 11 Answers
... At no extra charge, here are 4 such test cases: (1) The path of light is bent as it passes through a gravitational field (as shown by the solar eclipse experiment). (2) The precession of the direction of the long axis of Mercury’s orbit. (3) The gravitational redshift of light emitted from the surfa ...
... At no extra charge, here are 4 such test cases: (1) The path of light is bent as it passes through a gravitational field (as shown by the solar eclipse experiment). (2) The precession of the direction of the long axis of Mercury’s orbit. (3) The gravitational redshift of light emitted from the surfa ...
Stellar Classification
... the HR diagram has been used historically to determine what happens to stars as they are born, evolve, and die. 2. It is also important for students to understand that because stars lie in very defined regions on the diagram, we are able to use it to determine the distances to those stars on the bas ...
... the HR diagram has been used historically to determine what happens to stars as they are born, evolve, and die. 2. It is also important for students to understand that because stars lie in very defined regions on the diagram, we are able to use it to determine the distances to those stars on the bas ...
History of astronomy - Part I.
... degree. By 1600 the best stellar positions were good to +/- 1 or 2 arcminutes. If the nearest stars were as close as a couple thousand AU’s, parallaxes could have been measured. But no parallaxes were measured by the ancient Greeks or by Renaissance astronomers. ...
... degree. By 1600 the best stellar positions were good to +/- 1 or 2 arcminutes. If the nearest stars were as close as a couple thousand AU’s, parallaxes could have been measured. But no parallaxes were measured by the ancient Greeks or by Renaissance astronomers. ...
Chapter 26 Book Questions
... 29. Astronomers theorize that the universe came into being in an event called the _________________. 30. Circle the letter of each sentence that is true according to the big bang theory. A. The matter and energy in the universe was once concentrated in a very hot region smaller than a sentence perio ...
... 29. Astronomers theorize that the universe came into being in an event called the _________________. 30. Circle the letter of each sentence that is true according to the big bang theory. A. The matter and energy in the universe was once concentrated in a very hot region smaller than a sentence perio ...
9binary1i
... How can we weigh things in space? Watch how the star moves under the influence of the gravity of another star ...
... How can we weigh things in space? Watch how the star moves under the influence of the gravity of another star ...
Astronomy Study Guide
... Apparent brightness—the brightness of a star as seen from Earth Absolute brightness—a star’s brightness as if it were a standard distance from Earth Constellation—an imaginary pattern of stars (example—Orion) Hertzsprung - Russell diagram (H-R diagram)—a graph of stars showing surface temperature on ...
... Apparent brightness—the brightness of a star as seen from Earth Absolute brightness—a star’s brightness as if it were a standard distance from Earth Constellation—an imaginary pattern of stars (example—Orion) Hertzsprung - Russell diagram (H-R diagram)—a graph of stars showing surface temperature on ...
Question C:
... The easy way is to look up B−V=−0.30 for a B0V star in table A4-3, so B=2.5−0.3=2.2. The hard way is to first get the temperature of a B0 star from Figure 13-6 (25,000K), and calculate B−V=−0.52 using Equation 11-11a (although it is not meant for such hot stars). c. (5 pt): In a certain star, hydrog ...
... The easy way is to look up B−V=−0.30 for a B0V star in table A4-3, so B=2.5−0.3=2.2. The hard way is to first get the temperature of a B0 star from Figure 13-6 (25,000K), and calculate B−V=−0.52 using Equation 11-11a (although it is not meant for such hot stars). c. (5 pt): In a certain star, hydrog ...
Astronomy
... d. both b and c 15. In the HR diagram, stable stars with the smallest mass and lowest temperature are found in the ______ of the diagram. a. center (main sequence) b. upper left corner c. upper right corner d. lower right corner ...
... d. both b and c 15. In the HR diagram, stable stars with the smallest mass and lowest temperature are found in the ______ of the diagram. a. center (main sequence) b. upper left corner c. upper right corner d. lower right corner ...
Integrative Studies 410 Our Place in the Universe
... • If the mass of the star is sufficiently large (M > 25 MSun), even the neutron pressure cannot halt the collapse – in fact, no known force can stop it! • The star collapses to a very small size, with ultrahigh density • Nearby gravity becomes so strong that nothing – not even light – can escape! • ...
... • If the mass of the star is sufficiently large (M > 25 MSun), even the neutron pressure cannot halt the collapse – in fact, no known force can stop it! • The star collapses to a very small size, with ultrahigh density • Nearby gravity becomes so strong that nothing – not even light – can escape! • ...
Diapositiva 1
... Halo of the Cat's Eye Machine with which the photo has been taken: Nordic Optical Telescope. Explanation: The Cat’s Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. Its haunting symmetries are seen in the very central region of this stunning false-color picture, processe ...
... Halo of the Cat's Eye Machine with which the photo has been taken: Nordic Optical Telescope. Explanation: The Cat’s Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. Its haunting symmetries are seen in the very central region of this stunning false-color picture, processe ...
Colour - Magnitude Diagram for M 45
... The Pleiades is a relatively close open cluster. The six or seven stars visible to the naked eye form a tight grouping of stars (an asterism) near the even closer Hyades cluster. They are easily visible in the winter sky in the northern hemisphere. In this exercise, you will determine the colour of ...
... The Pleiades is a relatively close open cluster. The six or seven stars visible to the naked eye form a tight grouping of stars (an asterism) near the even closer Hyades cluster. They are easily visible in the winter sky in the northern hemisphere. In this exercise, you will determine the colour of ...
The Pulsar “Lighthouse”
... • Outer layers of star gradually contract onto core which becomes too massive to be held up by degenerate electron pressure • e- + p Î n • Sudden core collapse: 104 km Î 20 km • Then core rebounds • Outer layers fall in, then get hit by rebounding core. ...
... • Outer layers of star gradually contract onto core which becomes too massive to be held up by degenerate electron pressure • e- + p Î n • Sudden core collapse: 104 km Î 20 km • Then core rebounds • Outer layers fall in, then get hit by rebounding core. ...
The Doppler effect
... he tuned in to an area in space that was giving off large amounts of radio waves – the bright radio objects. In our solar system the Sun is the brightest of all the radio objects, and Jupiter is the second brightest. Radio astronomers wanted to identify their strong sources with objects they had s ...
... he tuned in to an area in space that was giving off large amounts of radio waves – the bright radio objects. In our solar system the Sun is the brightest of all the radio objects, and Jupiter is the second brightest. Radio astronomers wanted to identify their strong sources with objects they had s ...
Chapter Review
... Answer the two questions below in detail. Include some of the terms shown in the word box. In your answer, underline each term you use. 6. What is the relationship between Earth, our solar system, the Milky Way, and the universe? ...
... Answer the two questions below in detail. Include some of the terms shown in the word box. In your answer, underline each term you use. 6. What is the relationship between Earth, our solar system, the Milky Way, and the universe? ...
PowerPoint - Star Life Cycle
... Iron is the lightest element that doesn’t release energy when you attempt to fuse it together. You actually end up with less energy than you started with! So instead of generating pressure to hold up the outer layers, the iron fusion actually takes pressure out of the core. Thus, there is nothing ...
... Iron is the lightest element that doesn’t release energy when you attempt to fuse it together. You actually end up with less energy than you started with! So instead of generating pressure to hold up the outer layers, the iron fusion actually takes pressure out of the core. Thus, there is nothing ...
Astronomical Ideas Fall 2012 Homework 4 Solutions 1. Two stars
... ii. temperature: Distance doesnʼt need to be known. Temperature can be estimated directly from a starʼs color, or its spectrum. iii. color: Distance doesnʼt need to be known. The color can be directly observed for a star from images. iv. chemical composition: Distance doesnʼt need to be known to inf ...
... ii. temperature: Distance doesnʼt need to be known. Temperature can be estimated directly from a starʼs color, or its spectrum. iii. color: Distance doesnʼt need to be known. The color can be directly observed for a star from images. iv. chemical composition: Distance doesnʼt need to be known to inf ...
ESA-ESO Working Group on the Galaxy
... Narrow streams Thin long streams better probes (more reliable tracers of underlying potential; Eyre & Binney 2009) ...
... Narrow streams Thin long streams better probes (more reliable tracers of underlying potential; Eyre & Binney 2009) ...
PH109 Exploring the Uiverse, Test #4, Spring, 1999
... 35. After our Sun expands and engulfs the Earth in its red giant stage, what will be its final fate. a) become a nova b) become a neutron star c) become a white dwarf d) become a pulsar 36. The heaviest elements on Earth were originally created by a) Volcanoes b) the big bang c) super novae d) black ...
... 35. After our Sun expands and engulfs the Earth in its red giant stage, what will be its final fate. a) become a nova b) become a neutron star c) become a white dwarf d) become a pulsar 36. The heaviest elements on Earth were originally created by a) Volcanoes b) the big bang c) super novae d) black ...
Stars: Their Life and Afterlife
... not only tend to form close together in space, but also in time – and so, for massive stars, they will also die relatively close together in space and time. Superbubbles form from OB associations. OB associations are clusters of massive stars of spectral types – you guessed it – O and B. • O stars a ...
... not only tend to form close together in space, but also in time – and so, for massive stars, they will also die relatively close together in space and time. Superbubbles form from OB associations. OB associations are clusters of massive stars of spectral types – you guessed it – O and B. • O stars a ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.