Document
... In summer sunrise shifts the other way: From March until mid-June the Sun rises further north along the horizon. It climbs higher up into the sky like this: ...
... In summer sunrise shifts the other way: From March until mid-June the Sun rises further north along the horizon. It climbs higher up into the sky like this: ...
star map looking north january-march
... Our nearest large galaxy – Andromeda – can be seen in the Andromeda constellation. It appears to us as an elongated fuzzy blob. The Andromeda galaxy is so far away that its light takes over two million years to reach us. ...
... Our nearest large galaxy – Andromeda – can be seen in the Andromeda constellation. It appears to us as an elongated fuzzy blob. The Andromeda galaxy is so far away that its light takes over two million years to reach us. ...
The Degenerate Remnants of Massive Stars
... kilometers from the Black Hole In just 2 milliseconds she would fall the final few hundred kilometers to the event horizon …and crosses it!!! Her proper time continues normally and she encounters no frozen stellar surface since it has fallen through long ago. However once inside the event horizon….. ...
... kilometers from the Black Hole In just 2 milliseconds she would fall the final few hundred kilometers to the event horizon …and crosses it!!! Her proper time continues normally and she encounters no frozen stellar surface since it has fallen through long ago. However once inside the event horizon….. ...
The Sun
... The sun creates energy by nuclear fusion in its core The visible surface of the Sun is called the photosphere A thin cool layer, the chromosphere, allows us to determine what the sun is made of A very thin but very hot outer layer is called the corona Convection in the sun is revealed by granulation ...
... The sun creates energy by nuclear fusion in its core The visible surface of the Sun is called the photosphere A thin cool layer, the chromosphere, allows us to determine what the sun is made of A very thin but very hot outer layer is called the corona Convection in the sun is revealed by granulation ...
The Universe Fine-Tuned for Life
... combine to form a nucleus made of just two protons. This process, which is governed by strong interaction, would be much more rapid than the deuteron formation, which is governed by weak interaction. In this case, all hydrogen would have been converted to helium during the Big Bang nucleosynthesis. ...
... combine to form a nucleus made of just two protons. This process, which is governed by strong interaction, would be much more rapid than the deuteron formation, which is governed by weak interaction. In this case, all hydrogen would have been converted to helium during the Big Bang nucleosynthesis. ...
5 Elements of nuclear physics 5.1 Strong interaction and structure of atomic nuclei
... Because of the short range of nuclear forces, the binding energy of the nucleus is proportional, in the first approximation, to the number of nucleons, B1 ∝ A. Inasmuch as nuclei in the surface layer are at special conditions, one has to introduce an effective surface tension, which contributes to t ...
... Because of the short range of nuclear forces, the binding energy of the nucleus is proportional, in the first approximation, to the number of nucleons, B1 ∝ A. Inasmuch as nuclei in the surface layer are at special conditions, one has to introduce an effective surface tension, which contributes to t ...
CONSTELLATION CANES VENATICI the two hunting dogs Canes
... known as a brache, which is the same word as brace, meaning pair, and embrace). Here the leash is held by Bootes, the Herdsman or Bear Driver as they together pursue the Great Bear, Ursa Major, as it circles the Pole. The Polish astronomer Johannes Hevelius formed this constellation in 1687 from a s ...
... known as a brache, which is the same word as brace, meaning pair, and embrace). Here the leash is held by Bootes, the Herdsman or Bear Driver as they together pursue the Great Bear, Ursa Major, as it circles the Pole. The Polish astronomer Johannes Hevelius formed this constellation in 1687 from a s ...
The Ursa Major Moving Cluster, Collinder 285
... Most of the stars making up the Big Dipper show a common proper motion, as R.A. Proctor has found as early as 1869 (see e.g. Burnham). When W. Huggins, in 1872, determined their radial velocities from their spectra, it became apparent that they move approximately in the same spatial direction, and t ...
... Most of the stars making up the Big Dipper show a common proper motion, as R.A. Proctor has found as early as 1869 (see e.g. Burnham). When W. Huggins, in 1872, determined their radial velocities from their spectra, it became apparent that they move approximately in the same spatial direction, and t ...
λ max T = 2.898 x 10 -3
... towards higher frequency. 4. At higher temperatures there is a sharp falling off of radiation at values greater than λmax towards a limiting value in the ultraviolet range which is of very short wavelength but not zero. This is referred to as the ultra violet catastrophe. ...
... towards higher frequency. 4. At higher temperatures there is a sharp falling off of radiation at values greater than λmax towards a limiting value in the ultraviolet range which is of very short wavelength but not zero. This is referred to as the ultra violet catastrophe. ...
Chapter 13 Exploring the final frontier
... 27. Use Kepler’s law of periods to determine the time required for the following planets to complete an orbit of the Sun. The radius of the Earth’s orbit is 150 × 106 km. 28. Jake the flying ace needs to hide his new experimental high-velocity plane in the hangar, away from the view of foreign spy s ...
... 27. Use Kepler’s law of periods to determine the time required for the following planets to complete an orbit of the Sun. The radius of the Earth’s orbit is 150 × 106 km. 28. Jake the flying ace needs to hide his new experimental high-velocity plane in the hangar, away from the view of foreign spy s ...
14 The Interstellar Medium and Star Formation
... temperature rises because it is becoming more compact. At stage 6, the core reaches 106 K, and nuclear fusion begins. The protostar has become a star, but it is not in equilibrium. The star continues to contract and increase in temperature until it is in equilibrium. This is stage 7: The star has re ...
... temperature rises because it is becoming more compact. At stage 6, the core reaches 106 K, and nuclear fusion begins. The protostar has become a star, but it is not in equilibrium. The star continues to contract and increase in temperature until it is in equilibrium. This is stage 7: The star has re ...
29_worlds_unnumbered..
... Where in a planetary system to look for life. For Sun habitable zone from beyond Venus to inside Mars: about 0.75 to 1.5 Astronomical units. – Depends somewhat on planets atmosphere. – For brighter star habitable zone farther out, for dimmer star, zone closer in. ...
... Where in a planetary system to look for life. For Sun habitable zone from beyond Venus to inside Mars: about 0.75 to 1.5 Astronomical units. – Depends somewhat on planets atmosphere. – For brighter star habitable zone farther out, for dimmer star, zone closer in. ...
aas_gdemessieres - Astronomy at Swarthmore College
... oxy gen VII neon IX magnesium XI silicon XIII ...
... oxy gen VII neon IX magnesium XI silicon XIII ...
The Night Sky
... As promised in last month’s article, the world did not end on December 21, 2012. As the year 2013 begins, the earth passes through perihelion on January 2nd, its closest point to the sun in its elliptical orbit. On this date, it is 3% closer to the sun as compared to its farthest point, or aphelion, ...
... As promised in last month’s article, the world did not end on December 21, 2012. As the year 2013 begins, the earth passes through perihelion on January 2nd, its closest point to the sun in its elliptical orbit. On this date, it is 3% closer to the sun as compared to its farthest point, or aphelion, ...
PHYSICS 110: PHYSICS OF EVERYDAY PHENOMENA
... Course Goals: “What do we know? How do we know? What are the present research fields?” These three astronomy questions form the basis of our gradually more intensive study of the universe. In WHAT we examine what we can see in the sky first without optical aids and consider the atmospherically, geog ...
... Course Goals: “What do we know? How do we know? What are the present research fields?” These three astronomy questions form the basis of our gradually more intensive study of the universe. In WHAT we examine what we can see in the sky first without optical aids and consider the atmospherically, geog ...
The Ultraluminous X-ray Source in Holmberg IX and its Environment
... The two main hypotheses to explain the high luminosity of ULXs are intermediate mass black holes (IMBHs) having 102 to 105 solar masses (Colbert & Mushotzky 1999) or non-isotropic emission beamed into our line-of-sight (King et al. 2001). Here, we are interested in one of these objects, Holmberg IX ...
... The two main hypotheses to explain the high luminosity of ULXs are intermediate mass black holes (IMBHs) having 102 to 105 solar masses (Colbert & Mushotzky 1999) or non-isotropic emission beamed into our line-of-sight (King et al. 2001). Here, we are interested in one of these objects, Holmberg IX ...
solutions 3
... particle. If, during the random thermal jiggling, an electron moves one way or another, it changes the local energy. If you go the wrong way, it costs energy. If you go the other way, you get overall energy back. Thus, chemical potential gradients lead to net particle flow. Because the electrons are ...
... particle. If, during the random thermal jiggling, an electron moves one way or another, it changes the local energy. If you go the wrong way, it costs energy. If you go the other way, you get overall energy back. Thus, chemical potential gradients lead to net particle flow. Because the electrons are ...
Ch 20 Notes Stars
... centers of high mass stars that exploded their chemically rich guts into the galaxy, enriching pristine gas clouds with the chemistry of life. So that we are all connected to each other biologically, to the earth chemically and to the rest of the universe atomically…It’s not that we are better than ...
... centers of high mass stars that exploded their chemically rich guts into the galaxy, enriching pristine gas clouds with the chemistry of life. So that we are all connected to each other biologically, to the earth chemically and to the rest of the universe atomically…It’s not that we are better than ...
The Celestial Sphere - Department of Physics and Astronomy
... change relative to each other. Instead, all the motions that we see are due to the rotation of the Earth and the orbit of the Earth around the Sun. ...
... change relative to each other. Instead, all the motions that we see are due to the rotation of the Earth and the orbit of the Earth around the Sun. ...
1 2 3 4 5 6 Orbital Distance (AU) Orbital Period (Years) 1 2 3 4 5 6 7
... Astronomy 170B1 Due in class Jan 29 ...
... Astronomy 170B1 Due in class Jan 29 ...
here
... measure the speed of light. His attempt involved two observers positioned in two towers that were about 10km apart. The idea was that the first observer opens a shutter in a lantern and then as soon as the second observer sees the light from the first lantern, opens his shutter. Galileo would then m ...
... measure the speed of light. His attempt involved two observers positioned in two towers that were about 10km apart. The idea was that the first observer opens a shutter in a lantern and then as soon as the second observer sees the light from the first lantern, opens his shutter. Galileo would then m ...
4. How can we select stars whose planets are likely homes for life?
... Travel between stars is nearly impossible because the distances are too great and nature has imposed a very real speed limit that we can not exceed. Nothing can travel faster than the speed of light, and human travel can not be expected to exceed even a small fraction of the speed of light. Therefor ...
... Travel between stars is nearly impossible because the distances are too great and nature has imposed a very real speed limit that we can not exceed. Nothing can travel faster than the speed of light, and human travel can not be expected to exceed even a small fraction of the speed of light. Therefor ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.