Our Cosmic Neighborhood From our small world we have gazed
... agriculture. The stargazers also observed comets with sparkling tails, and meteors or shooting stars apparently falling from the sky. Since the invention of the telescope, three more planets have been discovered in our solar system: Uranus (1781), Neptune (1846), and, now downgraded to a dwarf plane ...
... agriculture. The stargazers also observed comets with sparkling tails, and meteors or shooting stars apparently falling from the sky. Since the invention of the telescope, three more planets have been discovered in our solar system: Uranus (1781), Neptune (1846), and, now downgraded to a dwarf plane ...
notes
... Larger (hotter) stars return material to the interstellar medium through supernova explosions (like the Crab ...
... Larger (hotter) stars return material to the interstellar medium through supernova explosions (like the Crab ...
xam2ans
... in the core of a main sequence star like the Sun? Answer: The rest mass energy of a neutron is larger than a proton plus electron. Consequently this reaction is endothermic, which means energetically unfavorable. (d) On the other hand, p+ + e → n + e does occur in a neutron star or a sufficiently ...
... in the core of a main sequence star like the Sun? Answer: The rest mass energy of a neutron is larger than a proton plus electron. Consequently this reaction is endothermic, which means energetically unfavorable. (d) On the other hand, p+ + e → n + e does occur in a neutron star or a sufficiently ...
fall_2000_final
... Earth is cited as support for A. the formation of the Moon. B. continental drift. C. magnetic reversal. D. a large asteroid impact. E. the presence of an atmosphere rich in oxygen. 7. An eclipse occurred in Australia. The phase of the moon observed in College Park that evening is full. What kind of ...
... Earth is cited as support for A. the formation of the Moon. B. continental drift. C. magnetic reversal. D. a large asteroid impact. E. the presence of an atmosphere rich in oxygen. 7. An eclipse occurred in Australia. The phase of the moon observed in College Park that evening is full. What kind of ...
L = σAT 4
... An electron in a higher state than the ground state is called an excited electron. ...
... An electron in a higher state than the ground state is called an excited electron. ...
Astronomy
... D) We see deeper into the layers of the Sun when we looks straight down, where the Sun is hotter E) The Sun is closer to the Earth at the central point, making it looks brighter 8. Just before a high mass star starts to undergo a massive star supernova, the core is made primarily of A) Helium B) Car ...
... D) We see deeper into the layers of the Sun when we looks straight down, where the Sun is hotter E) The Sun is closer to the Earth at the central point, making it looks brighter 8. Just before a high mass star starts to undergo a massive star supernova, the core is made primarily of A) Helium B) Car ...
Document
... C) There are a lot of new stars being born D) All the stars are very old E) None of the above 8. Why is the helium burning stage of a star so much shorter than the hydrogen burning stage? A) Because the star is more luminous and the burning produces less energy per fusion B) Because the star is less ...
... C) There are a lot of new stars being born D) All the stars are very old E) None of the above 8. Why is the helium burning stage of a star so much shorter than the hydrogen burning stage? A) Because the star is more luminous and the burning produces less energy per fusion B) Because the star is less ...
Astrophysics by Daniel Yang
... resolution similar to that of a single telescope with a much larger diameter. The Very Large Array in Mexico uses interferometry – each dish is 25m in diameter, but when an array 36 km across is combined, it provides the equivalent resolution of a dish with 36km diameter and sensitivity of a dish wi ...
... resolution similar to that of a single telescope with a much larger diameter. The Very Large Array in Mexico uses interferometry – each dish is 25m in diameter, but when an array 36 km across is combined, it provides the equivalent resolution of a dish with 36km diameter and sensitivity of a dish wi ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... Since distance α 1 / parallax, Spica must be at twice the distance of Canopus. (The numbers are 100 pc and 200 pc, but you don’t need to know that.) The more distant star (Spica) appears fainter. Since it is twice as distant as Canopus, it appears 4 times fainter, or ¼ as bright. We could use the ma ...
... Since distance α 1 / parallax, Spica must be at twice the distance of Canopus. (The numbers are 100 pc and 200 pc, but you don’t need to know that.) The more distant star (Spica) appears fainter. Since it is twice as distant as Canopus, it appears 4 times fainter, or ¼ as bright. We could use the ma ...
Properties of Stars: The H
... We can also determine the abundances of many elements in stars by using the `atomic fingerprints’ seen in spectral absorption lines. This is a tricky business! We already know that the strength and even presence of absorption lines is strongly temperature dependent. To use absorption line strengths ...
... We can also determine the abundances of many elements in stars by using the `atomic fingerprints’ seen in spectral absorption lines. This is a tricky business! We already know that the strength and even presence of absorption lines is strongly temperature dependent. To use absorption line strengths ...
The Sky from Your Point of View
... Best telescopes usually scheduled months in advance: • must be able to predict when an object will be up • light from Sun, Moon should not interfere ...
... Best telescopes usually scheduled months in advance: • must be able to predict when an object will be up • light from Sun, Moon should not interfere ...
Stars & Constellations
... However some constellations can be seen all year round. Some, like Cassiopeia are circumpolar - this means they circle above the pole, so can always been seen (the Earth’s orbit around the sun does not affect their viewing) ...
... However some constellations can be seen all year round. Some, like Cassiopeia are circumpolar - this means they circle above the pole, so can always been seen (the Earth’s orbit around the sun does not affect their viewing) ...
qwk4
... body and the wavelength of peak radiation bear an inverse relation to each other B. The luminosity of a black body is proportional to its temperature raised to the fourth power C. Atoms are capable of absorbing and re-emitting photons D. The energy of a photon is given by the formula: E = mc2 ...
... body and the wavelength of peak radiation bear an inverse relation to each other B. The luminosity of a black body is proportional to its temperature raised to the fourth power C. Atoms are capable of absorbing and re-emitting photons D. The energy of a photon is given by the formula: E = mc2 ...
Lecture103002
... Impossible to “see” directly Gravitational lensing is small Easiest to see if lots of material around ...
... Impossible to “see” directly Gravitational lensing is small Easiest to see if lots of material around ...
Spring `03 final exam study guide
... distance from the planets’ centers. The period of the satellite of planet X, though, is greater than that of the satellite of planet Y. Which planet must have the greater mass? Explain your reasoning. 16. Which planets have rings? 17. If you were classifying the planets by size only, you might make ...
... distance from the planets’ centers. The period of the satellite of planet X, though, is greater than that of the satellite of planet Y. Which planet must have the greater mass? Explain your reasoning. 16. Which planets have rings? 17. If you were classifying the planets by size only, you might make ...
The Dramatic Lives of Stars
... Given the position of young stars in the HR diagram, which of the following is true? A 0.5 solar mass star mostly: ...
... Given the position of young stars in the HR diagram, which of the following is true? A 0.5 solar mass star mostly: ...
File
... Temperature – the average kinetic energy of the individual particles in a sample of matter (how fast the atoms are moving) 4. What is the Troposphere? The lowest layer of the atmosphere where humans and all ...
... Temperature – the average kinetic energy of the individual particles in a sample of matter (how fast the atoms are moving) 4. What is the Troposphere? The lowest layer of the atmosphere where humans and all ...
Basic properties of stars
... This is data for NGC 2482. It is about 400 million years old. Stars considerably right of the main sequence are more distant giants. ...
... This is data for NGC 2482. It is about 400 million years old. Stars considerably right of the main sequence are more distant giants. ...
Right Ascension / Declination
... so they looked to the path of the Sun. The earth is tilted 23.5 degrees in its orbit around the Sun, causing the path of the Sun to only cross the celestial equator during the vernal and autumnal equinoxes. The vernal equinox (March 20/21) was selected, but now a measuring system was needed. Because ...
... so they looked to the path of the Sun. The earth is tilted 23.5 degrees in its orbit around the Sun, causing the path of the Sun to only cross the celestial equator during the vernal and autumnal equinoxes. The vernal equinox (March 20/21) was selected, but now a measuring system was needed. Because ...
Lesson Power Point
... the rest of the objects in the solar system put together. The next largest object is the planet Jupiter. ...
... the rest of the objects in the solar system put together. The next largest object is the planet Jupiter. ...
Document
... •Tried to estimate Rayleigh scattering due to ISM gas but determined it to be insignificant (because most obscuration is due to ISM dust absorption which has a smaller dependence) ...
... •Tried to estimate Rayleigh scattering due to ISM gas but determined it to be insignificant (because most obscuration is due to ISM dust absorption which has a smaller dependence) ...
Linking Asteroids and Meteorites through Reflectance
... • Planet appears to go backwards in its orbit ...
... • Planet appears to go backwards in its orbit ...
galaxies
... • young stars! only a few million years old • may still be surrounded by nebula from which they formed • located in the spiral arms of a galaxy • example: Pleiades ...
... • young stars! only a few million years old • may still be surrounded by nebula from which they formed • located in the spiral arms of a galaxy • example: Pleiades ...
Stars
... 85% of the stars. That’s because the most common stars are red dwarfs, which are small dim stars. Most of the stars we can see in the night sky, however, are brighter and larger that the sun. Because they are so far away, they must be large and bright to be visible from Earth. ...
... 85% of the stars. That’s because the most common stars are red dwarfs, which are small dim stars. Most of the stars we can see in the night sky, however, are brighter and larger that the sun. Because they are so far away, they must be large and bright to be visible from Earth. ...
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.