The Life Cycle of Spiral Arm Galaxies
... back into the interstellar medium by evolving massive stars, stellar winds, and supernovae. In other words, star formation is caused by shock waves in the interstellar medium. ...
... back into the interstellar medium by evolving massive stars, stellar winds, and supernovae. In other words, star formation is caused by shock waves in the interstellar medium. ...
Opposition of Saturn - Hong Kong Observatory
... Figure 1 Relative positions of a superior planet, the Earth and the Sun during opposition and conjunction of the superior planet. Opposition of Saturn Saturn is the second largest planet in the Solar System and the sixth planet away from the Sun. Saturn is characterized by the Saturn ring, wh ...
... Figure 1 Relative positions of a superior planet, the Earth and the Sun during opposition and conjunction of the superior planet. Opposition of Saturn Saturn is the second largest planet in the Solar System and the sixth planet away from the Sun. Saturn is characterized by the Saturn ring, wh ...
Second Semester Study Guide
... 25. What conclusion can be drawn from the fact that some planets with solid surfaces and satellites have impact craters? A. Collisions between Solar System bodies and planetesimals were common at one time. B. The young planets had softer surfaces. C. Volcanoes were very active in the early stages of ...
... 25. What conclusion can be drawn from the fact that some planets with solid surfaces and satellites have impact craters? A. Collisions between Solar System bodies and planetesimals were common at one time. B. The young planets had softer surfaces. C. Volcanoes were very active in the early stages of ...
Lecture 7
... The “S” in Sa,Sb,Sc,Sd stands for “spiral.” These galaxies are flattened rotating disks in which stars and gas march around the center in circular orbits, all going in the same direction. The orbital “orderliness” of spirals contrasts profoundly with the dynamical chaos of ellipticals. This orderlin ...
... The “S” in Sa,Sb,Sc,Sd stands for “spiral.” These galaxies are flattened rotating disks in which stars and gas march around the center in circular orbits, all going in the same direction. The orbital “orderliness” of spirals contrasts profoundly with the dynamical chaos of ellipticals. This orderlin ...
Life_Cycle_of_a_Star_Powerpoint
... • The core shrinks and the outer parts expand • It turns red as it is cooling • This phase will last until the star exhausts its remaining fuel. • The pressure of the nuclear reaction is not strong enough to equalize the force of gravity so the star will collapse. ...
... • The core shrinks and the outer parts expand • It turns red as it is cooling • This phase will last until the star exhausts its remaining fuel. • The pressure of the nuclear reaction is not strong enough to equalize the force of gravity so the star will collapse. ...
Infinity Express-1
... energy; and entropy. Hydrogen fusion essentially takes four hydrogen atoms and makes one helium atom out of them. The helium atom is a little less massive than the four hydrogens collectively; the lost mass is converted to a LOT of energy (E = mc2). The energy then dissipates, making it hard (imposs ...
... energy; and entropy. Hydrogen fusion essentially takes four hydrogen atoms and makes one helium atom out of them. The helium atom is a little less massive than the four hydrogens collectively; the lost mass is converted to a LOT of energy (E = mc2). The energy then dissipates, making it hard (imposs ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... While investigating how supermassive black holes formed in the early universe, UC Santa Cruz postdoctoral researcher Ke-Jung Chen stumbled on the unanticipated discovery that some primordial supermassive stars could explode without leaving any black hole or other stellar remnant behind. Chen had bee ...
... While investigating how supermassive black holes formed in the early universe, UC Santa Cruz postdoctoral researcher Ke-Jung Chen stumbled on the unanticipated discovery that some primordial supermassive stars could explode without leaving any black hole or other stellar remnant behind. Chen had bee ...
Colorado Model Solar System
... All of the sizes of the objects within the solar system (where possible), as well as the distances between them, have been reduced by this same scale factor. As a result, the apparent angular sizes and separations of objects in the model are accurate representations of how things truly appear in the ...
... All of the sizes of the objects within the solar system (where possible), as well as the distances between them, have been reduced by this same scale factor. As a result, the apparent angular sizes and separations of objects in the model are accurate representations of how things truly appear in the ...
30galaxies and the universe
... An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s birth, but instead evolve with the galaxy by trapping an amazingly exact percentage (0.2) of the mass of the stars and gas in a galaxy. Black holes in the centers of giant galaxies—some more than one billion solar ma ...
... An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s birth, but instead evolve with the galaxy by trapping an amazingly exact percentage (0.2) of the mass of the stars and gas in a galaxy. Black holes in the centers of giant galaxies—some more than one billion solar ma ...
Powerpoint of lecture 1
... Much more variety, but all diagrams show • Dominant main sequence, of varying length • Some giant stars, in variable numbers If all main sequences are the same (i.e. have the same absolute magnitude at a given temperature), then can create a composite HR diagram (Handout 3) – plausible if all stars ...
... Much more variety, but all diagrams show • Dominant main sequence, of varying length • Some giant stars, in variable numbers If all main sequences are the same (i.e. have the same absolute magnitude at a given temperature), then can create a composite HR diagram (Handout 3) – plausible if all stars ...
The Wizard Test Maker
... to Earth’s surface at solar noon on certain dates. The latitudes of six locations on the same line of longitude are shown. The observer is located at 42° N in New York State. The date for the Sun at position A has been deliberately left ...
... to Earth’s surface at solar noon on certain dates. The latitudes of six locations on the same line of longitude are shown. The observer is located at 42° N in New York State. The date for the Sun at position A has been deliberately left ...
binary star
... • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
... • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
Tutorial: Escape Speed
... The escape speed is defined to be the speed at which all kinetic energy at the surface of the object (planet, star….) is sufficient to allow the object to escape the influence of gravity. The calculation is based on conservation of energy arguments. ...
... The escape speed is defined to be the speed at which all kinetic energy at the surface of the object (planet, star….) is sufficient to allow the object to escape the influence of gravity. The calculation is based on conservation of energy arguments. ...
The Stars - Department of Physics and Astronomy
... reactions to convert mass into energy. Eventually, when a star’s nuclear fuel is depleted, the star must ...
... reactions to convert mass into energy. Eventually, when a star’s nuclear fuel is depleted, the star must ...
Sample
... In combating misconceptions about the cause of the seasons, we recommend that you follow the logic in the Common Misconceptions box. That is, begin by asking your students what they think causes the seasons. When many of them suggest that the seasons are linked to distance from the Sun, ask how seas ...
... In combating misconceptions about the cause of the seasons, we recommend that you follow the logic in the Common Misconceptions box. That is, begin by asking your students what they think causes the seasons. When many of them suggest that the seasons are linked to distance from the Sun, ask how seas ...
Define the following terms in the space provided
... D) Northwest, in the direction towards the U.S.A. E) The SCP cannot be seen from this location. 2) During Spring Break you and your friends plan to travel south to Cancun, Mexico for a week of sun and fun. You arrive in Cancun on a clear night. You look up at the stars and notice that they appear di ...
... D) Northwest, in the direction towards the U.S.A. E) The SCP cannot be seen from this location. 2) During Spring Break you and your friends plan to travel south to Cancun, Mexico for a week of sun and fun. You arrive in Cancun on a clear night. You look up at the stars and notice that they appear di ...
chapter 2
... A star speckled night sky filled the minds of men with awe, not only in the past but also at present. From the ancient time, man has observed stars and planets appearing in the night sky and he has come up with various theories about them. Accordingly, astronomy can be considered as the oldest scien ...
... A star speckled night sky filled the minds of men with awe, not only in the past but also at present. From the ancient time, man has observed stars and planets appearing in the night sky and he has come up with various theories about them. Accordingly, astronomy can be considered as the oldest scien ...
Resources - gmu ttac - George Mason University
... undertake the exercise themselves. Place a small representation of Polaris somewhere high up in the room, and point it out to the students. Tell them that the globe represents Earth, the floor represents the plane of Earth’s flat orbit around the sun, and the lamp elevated in the center of the room ...
... undertake the exercise themselves. Place a small representation of Polaris somewhere high up in the room, and point it out to the students. Tell them that the globe represents Earth, the floor represents the plane of Earth’s flat orbit around the sun, and the lamp elevated in the center of the room ...
printer-friendly sample test questions
... A. The once-smaller universe is expanding in all directions. B. The Sun and Earth are located at the center of the universe. C. Everything in the universe is moving the same direction. D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away fr ...
... A. The once-smaller universe is expanding in all directions. B. The Sun and Earth are located at the center of the universe. C. Everything in the universe is moving the same direction. D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away fr ...
HW #10 Solutions
... the Elongation angle (i.e. Sun-Earth-Moon angle) of Moon when it is New and Gibbous. When the Moon is in the New Moon phase, it is in conjunction with the Sun and has an elongation angle near zero. So the real angular separation of the New Moon and the Sun is near zero degrees. When the Moon is in t ...
... the Elongation angle (i.e. Sun-Earth-Moon angle) of Moon when it is New and Gibbous. When the Moon is in the New Moon phase, it is in conjunction with the Sun and has an elongation angle near zero. So the real angular separation of the New Moon and the Sun is near zero degrees. When the Moon is in t ...
Galactic Evolution:
... times in the Milky Way with the same metallicity as the Sun will not necessarily form habitable Earth like planets. As a result of the radial Galactic metafficity gradient, the outer limit of the GHZ is set primarily by the minimum required metallicity to build large terrestrial planets. Regions of ...
... times in the Milky Way with the same metallicity as the Sun will not necessarily form habitable Earth like planets. As a result of the radial Galactic metafficity gradient, the outer limit of the GHZ is set primarily by the minimum required metallicity to build large terrestrial planets. Regions of ...
Rare Earth hypothesis
In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.