A Dart Board for the Bored An eye opening offer from the editors of
... and also to help thicken the WASP. I have chosen to make one myself because I suspect that such a long focal length is ideal for lunar and planetary photography without the complex arrangements of eyepiece projection and afocal photography, In my case, the primary mirror is of 8" aperture and has a ...
... and also to help thicken the WASP. I have chosen to make one myself because I suspect that such a long focal length is ideal for lunar and planetary photography without the complex arrangements of eyepiece projection and afocal photography, In my case, the primary mirror is of 8" aperture and has a ...
Chapter 26
... • They take many different shapes and contain 100 million to 10 billion stars, making them larger than dwarf ellipticals but smaller than spirals. ...
... • They take many different shapes and contain 100 million to 10 billion stars, making them larger than dwarf ellipticals but smaller than spirals. ...
ASTR2050 Spring 2005 •
... A certain telescope allows you to see a million times more light than your naked eye. What is the faintest magnitude star that you can see now? ...
... A certain telescope allows you to see a million times more light than your naked eye. What is the faintest magnitude star that you can see now? ...
Reach for the Stars – Div. B
... of stars 2. The Main sequence is the location of stars on the H-R diagram where stars spend most of their lives 3. Stars remain stable for long periods (on the main sequence) by balancing the force of gravity with the energy generated by nuclear fusion of hydrogen to helium in the star’s core. 4. Re ...
... of stars 2. The Main sequence is the location of stars on the H-R diagram where stars spend most of their lives 3. Stars remain stable for long periods (on the main sequence) by balancing the force of gravity with the energy generated by nuclear fusion of hydrogen to helium in the star’s core. 4. Re ...
12.4 Evolution of Stars More Massive than the Sun
... Carbon-detonation supernova: white dwarf that has accumulated too much mass from binary companion If the white dwarf’s mass exceeds 1.4 solar masses, electron degeneracy can no longer keep the core from collapsing. Carbon fusion begins throughout the star almost simultaneously, resulting in a carbon ...
... Carbon-detonation supernova: white dwarf that has accumulated too much mass from binary companion If the white dwarf’s mass exceeds 1.4 solar masses, electron degeneracy can no longer keep the core from collapsing. Carbon fusion begins throughout the star almost simultaneously, resulting in a carbon ...
Review Questions for Exam #2
... luminosity and mass related on the MS and why? • Put a big “R” in the place where on the diagram where the radii are the biggest. Put a “r” where the radii are the smallest. • Given the relation L = σT4(4πR2) explain why the “R” and “r” are at the locations you have labeled ...
... luminosity and mass related on the MS and why? • Put a big “R” in the place where on the diagram where the radii are the biggest. Put a “r” where the radii are the smallest. • Given the relation L = σT4(4πR2) explain why the “R” and “r” are at the locations you have labeled ...
starevolution - Global Change Program
... Nebula. For a detailed view of the Crab Nebula, look at the recent Hubble Telescope image. This supernova remnant is 6,500 light years away. Another beautiful example of a supernova remnant is the Cygnus Loop, lying about 2,500 light years away (on right). The evolution of even more massive stars pr ...
... Nebula. For a detailed view of the Crab Nebula, look at the recent Hubble Telescope image. This supernova remnant is 6,500 light years away. Another beautiful example of a supernova remnant is the Cygnus Loop, lying about 2,500 light years away (on right). The evolution of even more massive stars pr ...
ASTR 1010 – Spring 2016 – Study Notes Dr. Magnani
... Aristotle’s argument convinced most people at the time, but not Aristarchus of Samos, who argued for a heliocentric model based on his estimates of the relative sizes of Sun, Earth, and Moon. He ...
... Aristotle’s argument convinced most people at the time, but not Aristarchus of Samos, who argued for a heliocentric model based on his estimates of the relative sizes of Sun, Earth, and Moon. He ...
Practice Questions for Final
... According to the Big Bang theory, why do we live in a universe that is made of matter rather than antimatter? A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy ...
... According to the Big Bang theory, why do we live in a universe that is made of matter rather than antimatter? A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy ...
Sample Math problems
... 4) What is the Scwarzschild radius of a 100 million-solar-mass black hole? a) 3 million km b) 3 km c) 30 km d) 300 million km e) 3,000 km 5) [FIXED] When my cat and I are in the same reference frame, I measure its tail to be 13 inches long. The other day my cat saw another cat outside of the window ...
... 4) What is the Scwarzschild radius of a 100 million-solar-mass black hole? a) 3 million km b) 3 km c) 30 km d) 300 million km e) 3,000 km 5) [FIXED] When my cat and I are in the same reference frame, I measure its tail to be 13 inches long. The other day my cat saw another cat outside of the window ...
CO 2 Cycle
... carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking out from an underground source, to carry debris before totally evaporating and freezin ...
... carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking out from an underground source, to carry debris before totally evaporating and freezin ...
Measuring the Distances to the Stars: Parallax What sets the parallax limit?
... MW Rotation Curve • In principle, for stars, clusters, etc: ...
... MW Rotation Curve • In principle, for stars, clusters, etc: ...
The Constellations
... • Star pattern repeats itself about every 24 hours… because of the rotation of Earth with respect to the distant stars! • Star pattern in the winter is different from that in the summer… because of the revolution of Earth around the Sun! • Stars do move back a nd forth (a teeny-tiny bit) in the sky ...
... • Star pattern repeats itself about every 24 hours… because of the rotation of Earth with respect to the distant stars! • Star pattern in the winter is different from that in the summer… because of the revolution of Earth around the Sun! • Stars do move back a nd forth (a teeny-tiny bit) in the sky ...
1. If a star`s temperature is doubled but radius is kept constant, by
... 7. Does an object at a blackbody temperature of about 6000K emit more or less total energy that a blackbody of temperatuure of 5500K? At what type of wavelengths does the hotter body emit more energy? 7a. Emits more total energy and emits more at shorter wavelengths. 8. Which of the above two object ...
... 7. Does an object at a blackbody temperature of about 6000K emit more or less total energy that a blackbody of temperatuure of 5500K? At what type of wavelengths does the hotter body emit more energy? 7a. Emits more total energy and emits more at shorter wavelengths. 8. Which of the above two object ...
solutions
... the core of the Sun suddenly stopped, the surface would continue to shine for millions of years, and therefore, the luminosity would not decrease abruptly. We also now know that if the energy source were turned off, the Sun would contract and the energy from this contraction would continue to power ...
... the core of the Sun suddenly stopped, the surface would continue to shine for millions of years, and therefore, the luminosity would not decrease abruptly. We also now know that if the energy source were turned off, the Sun would contract and the energy from this contraction would continue to power ...
Section 4
... There are two major types of star clusters: open clusters and globular clusters. Open clusters have a loose, disorganized appearance and contain no more than a few thousand stars. They often contain many bright supergiants and much gas and dust. In contrast, globular clusters are large groupings of ...
... There are two major types of star clusters: open clusters and globular clusters. Open clusters have a loose, disorganized appearance and contain no more than a few thousand stars. They often contain many bright supergiants and much gas and dust. In contrast, globular clusters are large groupings of ...
Our Star - the Sun
... detected and analyzed, even though the system may be so distant or the two stars so close together that the two star images cannot be resolved A spectrum binary appears to be a single star but has a spectrum with the absorption lines for two distinctly different spectral types A spectroscopic binary ...
... detected and analyzed, even though the system may be so distant or the two stars so close together that the two star images cannot be resolved A spectrum binary appears to be a single star but has a spectrum with the absorption lines for two distinctly different spectral types A spectroscopic binary ...
Quiz Solution: 1 April 2013 What does it mean when an astronomer
... Quiz Solution: 1 April 2013 What does it mean when an astronomer says that a star "moves" from one place to another on an H-R Diagram? Can you provide an example of this? As stars evolve and change structure, their radii and temperatures also change. Since a star's luminosity is dependent on both te ...
... Quiz Solution: 1 April 2013 What does it mean when an astronomer says that a star "moves" from one place to another on an H-R Diagram? Can you provide an example of this? As stars evolve and change structure, their radii and temperatures also change. Since a star's luminosity is dependent on both te ...
Stars and Light
... out) gravity will force the sun to collapse, which will increase the temperature so He can fuse (to form carbon). • When it does this, the outer layers “explode” and it becomes a Red Giant star. ...
... out) gravity will force the sun to collapse, which will increase the temperature so He can fuse (to form carbon). • When it does this, the outer layers “explode” and it becomes a Red Giant star. ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.