a MS Word version.
... star points usually seen on an HR Diagram. How do we know that sequences listed as "giant..." are plotting actual giant stars? Same question for "dwarf..."? ...
... star points usually seen on an HR Diagram. How do we know that sequences listed as "giant..." are plotting actual giant stars? Same question for "dwarf..."? ...
![Assignment 2 — Solutions [Revision : 1.3]](http://s1.studyres.com/store/data/002192877_1-a47428803f1a40e19ac72f9284c255e1-300x300.png)
Assignment 2 — Solutions [Revision : 1.3]
... (this comes from equation 7.11 of Ostlie & Carrol; but I’ve used F instead of B to denote the flux received here on earth. These are not surface fluxes, they are measured fluxes!). To find the eclipse depths, we use the observed bolometric magnitudes: F1 = 10(mbol,0 −mbol,1 )/2.5 = 0.0302, F0 F2 = 1 ...
... (this comes from equation 7.11 of Ostlie & Carrol; but I’ve used F instead of B to denote the flux received here on earth. These are not surface fluxes, they are measured fluxes!). To find the eclipse depths, we use the observed bolometric magnitudes: F1 = 10(mbol,0 −mbol,1 )/2.5 = 0.0302, F0 F2 = 1 ...
Union College Spring 2016 Astronomy 50 Lab: Diameter of the
... However, stars 2-5 of the little dipper are quite faint and not see easy to see if there are city lights or a full moon lighting the sky. Using your quadrant, measure the elevation angle of the North Pole star. This is the value of 1 in the equations above. Our collaborators in Mexico will tell us ...
... However, stars 2-5 of the little dipper are quite faint and not see easy to see if there are city lights or a full moon lighting the sky. Using your quadrant, measure the elevation angle of the North Pole star. This is the value of 1 in the equations above. Our collaborators in Mexico will tell us ...
Eclipses, Distance, Parallax, Small Angle, and Magnitude (Professor
... • If the Moon’s orbit was fixed in the sky with Earth’s then the Eclipse season would always happen at the same time of year. • But the orbital nodes precess with a period of roughly 18.6 years. • This causes the Eclipse season to occur about 3 weeks earlier/year ...
... • If the Moon’s orbit was fixed in the sky with Earth’s then the Eclipse season would always happen at the same time of year. • But the orbital nodes precess with a period of roughly 18.6 years. • This causes the Eclipse season to occur about 3 weeks earlier/year ...
astro2_lec1 - Astronomy & Astrophysics Group
... But spirals contain many newlyformed stars. Do spirals evolve into ellipticals?... ...
... But spirals contain many newlyformed stars. Do spirals evolve into ellipticals?... ...
TAP 704- 8: The ladder of astronomical distances
... due to real differences in brightness, since they were all more or less at the same distance. She could not know how bright the stars were, or how far away they were. But she provided a way for astronomers to compare true brightness just by clocking the time of variation, and so to get ratios of di ...
... due to real differences in brightness, since they were all more or less at the same distance. She could not know how bright the stars were, or how far away they were. But she provided a way for astronomers to compare true brightness just by clocking the time of variation, and so to get ratios of di ...
Star Clusters and their stars
... and angular momentum from the disk will spin it up – this stage is called a Low-Mass X-ray Binary. An extreme case is MXB 1820-30, in the globular cluster NGC 6624. This system has the shortest orbital period known for any astronomical object – only 11.4 minutes. Relative to their mass, globular clu ...
... and angular momentum from the disk will spin it up – this stage is called a Low-Mass X-ray Binary. An extreme case is MXB 1820-30, in the globular cluster NGC 6624. This system has the shortest orbital period known for any astronomical object – only 11.4 minutes. Relative to their mass, globular clu ...
Star_Clusters
... and angular momentum from the disk will spin it up – this stage is called a Low-Mass X-ray Binary. An extreme case is MXB 1820-30, in the globular cluster NGC 6624. This system has the shortest orbital period known for any astronomical object – only 11.4 minutes. Relative to their mass, globular clu ...
... and angular momentum from the disk will spin it up – this stage is called a Low-Mass X-ray Binary. An extreme case is MXB 1820-30, in the globular cluster NGC 6624. This system has the shortest orbital period known for any astronomical object – only 11.4 minutes. Relative to their mass, globular clu ...
Calculations on space-time curvature within the Earth and Sun
... Using the same method as before, this was numerically integrated for the Sun. Volume was not directly compared to the result from V = (4/3)πR3 because of the low accuracy of the integration method. This was instead compared to the result obtained when dr was substituted for ds (an expression for vol ...
... Using the same method as before, this was numerically integrated for the Sun. Volume was not directly compared to the result from V = (4/3)πR3 because of the low accuracy of the integration method. This was instead compared to the result obtained when dr was substituted for ds (an expression for vol ...
The Stars of Namaqualand
... The star Rigel, which belongs to Orion, is blue-white because of its high temperature and 57000 times brighter than our sun. In spite of the distant of 540 light years from the Earth, it shines as the seventh brightest star in our night sky. The astronomers believe, that Rigel is the most luminous s ...
... The star Rigel, which belongs to Orion, is blue-white because of its high temperature and 57000 times brighter than our sun. In spite of the distant of 540 light years from the Earth, it shines as the seventh brightest star in our night sky. The astronomers believe, that Rigel is the most luminous s ...
Astrophysics notes - School
... Magnitude is a measure of how bright a star is. There are, however, two different ways of indicating a stars magnitude; apparent magnitude and absolute magnitude. The scale we use to measure magnitude is based on that created by the ancient Greeks which ran from 1 to 6. On the ancient Greek scale 1 ...
... Magnitude is a measure of how bright a star is. There are, however, two different ways of indicating a stars magnitude; apparent magnitude and absolute magnitude. The scale we use to measure magnitude is based on that created by the ancient Greeks which ran from 1 to 6. On the ancient Greek scale 1 ...
Time and Diurnal Motion 1a. The Earth Is Flat
... This is because we are 2 degrees longitude west of Lake Tahoe. It takes 8 minutes for the sun to travel from Lake Tahoe to here. ...
... This is because we are 2 degrees longitude west of Lake Tahoe. It takes 8 minutes for the sun to travel from Lake Tahoe to here. ...
Star Maps and Constellations (pdf 3.7 Megs)
... magnitude, so numbers "less" than 1 have to be used. For example, Vega has a magnitude of 0, meaning it is brighter than a first magnitude star. The brightest star is Sirius, with a magnitude of 1.5, even brighter than Vega. The moon on this scale is -12.5, the sun -26.8 (see Table SC-VI). Polaris w ...
... magnitude, so numbers "less" than 1 have to be used. For example, Vega has a magnitude of 0, meaning it is brighter than a first magnitude star. The brightest star is Sirius, with a magnitude of 1.5, even brighter than Vega. The moon on this scale is -12.5, the sun -26.8 (see Table SC-VI). Polaris w ...
Death by Black Hole Study Guide-Answers - crespiphysics
... 5. Dust will absorb _________ _________ and reemit the energy as IR. Visible light 6. Within a collapsing cloud, once the temperature reaches _____ million degrees, protons will fuse into helium nuclei. ...
... 5. Dust will absorb _________ _________ and reemit the energy as IR. Visible light 6. Within a collapsing cloud, once the temperature reaches _____ million degrees, protons will fuse into helium nuclei. ...
Parallax - The Universe Adventure
... the moon using the parallax shift viewed between two cities on Earth. The distance he calculated is surprisingly close to the accurate distance we can measure today! Later astronomers were able to estimate the distance to planets and nearby stars using parallax with the diameter of the Earth’s orbit ...
... the moon using the parallax shift viewed between two cities on Earth. The distance he calculated is surprisingly close to the accurate distance we can measure today! Later astronomers were able to estimate the distance to planets and nearby stars using parallax with the diameter of the Earth’s orbit ...
HR Diagram of a Star Cluster
... A cluster of stars which is localized in space is usually localized in time also. Surprisingly, the brightness (magnitude) of the stars in two different color bands can be interpreted to tell the cluster's age and distance from Earth. This is done by plotting a magnitude vs. color diagram (as Hertzs ...
... A cluster of stars which is localized in space is usually localized in time also. Surprisingly, the brightness (magnitude) of the stars in two different color bands can be interpreted to tell the cluster's age and distance from Earth. This is done by plotting a magnitude vs. color diagram (as Hertzs ...
Week8Lecture1
... How Variable Stars Work Slowly pulsate (change in size and temperature) • Star compressed: heats up, pushes outer layers out • Star expands: cools and contracts • Cycle repeats ...
... How Variable Stars Work Slowly pulsate (change in size and temperature) • Star compressed: heats up, pushes outer layers out • Star expands: cools and contracts • Cycle repeats ...
The Scales of Things
... A certain absorption line that is found at 5000Å in the lab is found at 5050Å when analyzing the spectrum of a particular galaxy. We then conclude that this galaxy is moving with a velocity v = (50/5000) * c = 3000 km/sec away from us. Putting it altogether now, if the object is moving away from us ...
... A certain absorption line that is found at 5000Å in the lab is found at 5050Å when analyzing the spectrum of a particular galaxy. We then conclude that this galaxy is moving with a velocity v = (50/5000) * c = 3000 km/sec away from us. Putting it altogether now, if the object is moving away from us ...
September
... describes, is the Full Moon at or after the Equinox, which can also put the Harvest Moon in October some years. To the Sioux Indians this moon is the Dying Grass Moon. Morning Star - Saturn and Mars. Evening Star - Venus, Jupiter and Mercury. ...
... describes, is the Full Moon at or after the Equinox, which can also put the Harvest Moon in October some years. To the Sioux Indians this moon is the Dying Grass Moon. Morning Star - Saturn and Mars. Evening Star - Venus, Jupiter and Mercury. ...
E3 – Stellar distances
... • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known ...
... • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known ...
Last Final Review - Steady Server Pages
... We always see the same side Its orbital period is the same as the Earth’s about the sun It rotates around its own axis faster than it orbits Earth It is not in hydrostatic equilibrium The temperature ranges from 90 to 370 Fahrenheit. ...
... We always see the same side Its orbital period is the same as the Earth’s about the sun It rotates around its own axis faster than it orbits Earth It is not in hydrostatic equilibrium The temperature ranges from 90 to 370 Fahrenheit. ...
Problem Set 1, due Sep 4
... For positive exponents, move the decimal point to the right the number of spaces indicated by the exponent, and place zeros in any space that doesn’t have a number in it. For example: ...
... For positive exponents, move the decimal point to the right the number of spaces indicated by the exponent, and place zeros in any space that doesn’t have a number in it. For example: ...
Reflecting telescopes - School
... Magnitude is a measure of how bright a star is. There are, however, two different ways of indicating a stars magnitude; apparent magnitude and absolute magnitude. The scale we use to measure magnitude is based on that created by the ancient Greeks which ran from 1 to 6. On the ancient Greek scale 1 ...
... Magnitude is a measure of how bright a star is. There are, however, two different ways of indicating a stars magnitude; apparent magnitude and absolute magnitude. The scale we use to measure magnitude is based on that created by the ancient Greeks which ran from 1 to 6. On the ancient Greek scale 1 ...
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.