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Astronomical Distances
... When we talk about terrestrial (on Earth) distances we might use inches feet or miles, in science we might use centimeters, meters, or kilometers. When we talk about objects in our universe these units are much too small, it would be like calculating the distance between Naperville and London in mil ...
... When we talk about terrestrial (on Earth) distances we might use inches feet or miles, in science we might use centimeters, meters, or kilometers. When we talk about objects in our universe these units are much too small, it would be like calculating the distance between Naperville and London in mil ...
Astronomy Test Review
... 17. A main-sequence star is at equilibrium between gravity and gas pressure. 18. The main fuel for main-sequence stars is hydrogen while red giants burn helium. ...
... 17. A main-sequence star is at equilibrium between gravity and gas pressure. 18. The main fuel for main-sequence stars is hydrogen while red giants burn helium. ...
solutions
... 5 What determines a star’s spectral type? The temperature sets the star’s color and determines its surface brightness: how much light comes from each square meter of its surface. The atmospheric pressure depends on the star’s surface gravity and therefore, roughly, on its size telling whether it is ...
... 5 What determines a star’s spectral type? The temperature sets the star’s color and determines its surface brightness: how much light comes from each square meter of its surface. The atmospheric pressure depends on the star’s surface gravity and therefore, roughly, on its size telling whether it is ...
Session Two - A Sidewalk Astronomer in Charlottetown
... difference is that a star is a point of light, whereas a galaxy has a larger apparent surface area. The entire luminosity of the object is summed over it's area. The magnitude is then the same as a point source like a star emitting the luminosity. Therefore, large objects appear dimmer than stars th ...
... difference is that a star is a point of light, whereas a galaxy has a larger apparent surface area. The entire luminosity of the object is summed over it's area. The magnitude is then the same as a point source like a star emitting the luminosity. Therefore, large objects appear dimmer than stars th ...
At the Heart of the Matter: The Blue White Dwarf in M 57. Paul Temple
... molecular or atomic carbon in any part of the spectrum. These stars are cool enough so that H atoms can join together into molecules, and so the signature of molecular H may also be observed. DZ Stars exhibiting only metal lines from species such as Ca and Fe. No H or He present. ...
... molecular or atomic carbon in any part of the spectrum. These stars are cool enough so that H atoms can join together into molecules, and so the signature of molecular H may also be observed. DZ Stars exhibiting only metal lines from species such as Ca and Fe. No H or He present. ...
light energy
... • Distances can be deceiving: Bright stars look close, but may be very far away Star Approx. Distance (LY) P. Centari ...
... • Distances can be deceiving: Bright stars look close, but may be very far away Star Approx. Distance (LY) P. Centari ...
February - Bristol Astronomical Society
... planet fades by half a magnitude from +0.2 to +0.7 as its distance form the Earth increases. Mars can be found in the constellation of Aries at the start of the month moving into Taurus at the end of the first week. Jupiter is very prominent in the morning sky in the constellation of Libra. Jupiter ...
... planet fades by half a magnitude from +0.2 to +0.7 as its distance form the Earth increases. Mars can be found in the constellation of Aries at the start of the month moving into Taurus at the end of the first week. Jupiter is very prominent in the morning sky in the constellation of Libra. Jupiter ...
Astr 40 Final Exam Review ()
... underwent a supernova explosion right now, approximately how long would it be until we found out about it? 5300 years. 9. The most important reason for measuring the parallax of a star is to help us find the stars intrinsic brightness (absolute magnitude) or luminosity. 10. If two intrinsically iden ...
... underwent a supernova explosion right now, approximately how long would it be until we found out about it? 5300 years. 9. The most important reason for measuring the parallax of a star is to help us find the stars intrinsic brightness (absolute magnitude) or luminosity. 10. If two intrinsically iden ...
Locating Objects in Space
... Ranges from 1st – 6th magnitude, 1st is 100 times brighter than 6th Difference of 1 magnitude corresponds to a factor of 2.512 in brightness Does not take into account the distance of the star ...
... Ranges from 1st – 6th magnitude, 1st is 100 times brighter than 6th Difference of 1 magnitude corresponds to a factor of 2.512 in brightness Does not take into account the distance of the star ...
Distance Lab: The Astronomical Unit
... notebook. Use page 104 in the textbook to help you out. 2. Parallax: Look up at the balloon globe hanging above the teachers’ desk. Behind the globe are some pictures of mountains and glaciers that are numbered 1-10. Which number do you see? 3. Move to the other side of the room for a moment, and lo ...
... notebook. Use page 104 in the textbook to help you out. 2. Parallax: Look up at the balloon globe hanging above the teachers’ desk. Behind the globe are some pictures of mountains and glaciers that are numbered 1-10. Which number do you see? 3. Move to the other side of the room for a moment, and lo ...
SHELL H II REGIONS IN NGC 6334
... • Approach that takes advantage of old archival data that can be compared with more recent observations. • Addresses key parameters in astronomy such as mass, distance, and age. ...
... • Approach that takes advantage of old archival data that can be compared with more recent observations. • Addresses key parameters in astronomy such as mass, distance, and age. ...
Chapter16
... One of the stories in astronomy teaching lore is about a university lecturer who had just finished discussing parallaxes and the distance of the stars. A student came up to him and asked “If the stars are so far away, how do we know their names?”. 2. The Distances of Stars After years of Star Trek a ...
... One of the stories in astronomy teaching lore is about a university lecturer who had just finished discussing parallaxes and the distance of the stars. A student came up to him and asked “If the stars are so far away, how do we know their names?”. 2. The Distances of Stars After years of Star Trek a ...
Characteristics of Stars
... to travel to the center of our galaxy at light speed? How long would it take to travel to the Andromeda galaxy? How many galaxies are there in the Universe? What is the Universe? What is most of the Universe? 2. What is an astronomical unit? How far is it in km? How far is it in miles? What is a lig ...
... to travel to the center of our galaxy at light speed? How long would it take to travel to the Andromeda galaxy? How many galaxies are there in the Universe? What is the Universe? What is most of the Universe? 2. What is an astronomical unit? How far is it in km? How far is it in miles? What is a lig ...
here. - SUNY Oswego
... temperature. We looked at the ratio between the maximum and minimum, and assuming the radius is fairly similar at maximum and minimum light, we are left with an equation that states the amplitude should be directly related to the temperature at maximum and minimum temperature. ...
... temperature. We looked at the ratio between the maximum and minimum, and assuming the radius is fairly similar at maximum and minimum light, we are left with an equation that states the amplitude should be directly related to the temperature at maximum and minimum temperature. ...
Astronomy 2
... Each star is represented by a dot. One uses data from lots of stars, so there are lots of dots. The position of each dot on the diagram corresponds to the star's luminosity and its temperature The vertical position represents the star's luminosity (absolute magnitude). The horizontal position re ...
... Each star is represented by a dot. One uses data from lots of stars, so there are lots of dots. The position of each dot on the diagram corresponds to the star's luminosity and its temperature The vertical position represents the star's luminosity (absolute magnitude). The horizontal position re ...
Worksheet: Stars and the HR Diagram
... Background: The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were al the same distance away. Rather than speak of the br ...
... Background: The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were al the same distance away. Rather than speak of the br ...
Stars, H-R and Life Cycle of Star
... They discovered that stars grouped by type and during their lifetimes would move from one place on the graph to another. As our sun ages, it will move to a giant star to a ...
... They discovered that stars grouped by type and during their lifetimes would move from one place on the graph to another. As our sun ages, it will move to a giant star to a ...
The Milky Way Galaxy
... Globular clusters must orbit around the center of mass of the galaxy! Thus, assuming the clusters are distributed uniformly around the galaxy, he measured the 3D distribution of clusters (using Cepheid variables) and then assumed that the center of that distribution was where the center of the galax ...
... Globular clusters must orbit around the center of mass of the galaxy! Thus, assuming the clusters are distributed uniformly around the galaxy, he measured the 3D distribution of clusters (using Cepheid variables) and then assumed that the center of that distribution was where the center of the galax ...
the lab handout here
... According to the HR diagram, a massive star with a surface temperature of 20,000 K that is nearly a million times brighter than the sun would mostly likely be classified as a ...
... According to the HR diagram, a massive star with a surface temperature of 20,000 K that is nearly a million times brighter than the sun would mostly likely be classified as a ...
Stars
... • Apparent Magnitude: stars closer to Earth appear brighter than those that are farther away • Absolute Magnitude: big stars are brighter than small stars. This is the ACTUAL brightness of the star – If all the stars were lined up equi-distant from Earth, we would be able to compare their actual bri ...
... • Apparent Magnitude: stars closer to Earth appear brighter than those that are farther away • Absolute Magnitude: big stars are brighter than small stars. This is the ACTUAL brightness of the star – If all the stars were lined up equi-distant from Earth, we would be able to compare their actual bri ...
Earth in space
... 1. Types of galaxies Galaxies are classified based upon their shape Spiral galaxies: consist of a central nucleus with “arms” that trail behind while the galaxy rotates The Milky Way is a spiral ...
... 1. Types of galaxies Galaxies are classified based upon their shape Spiral galaxies: consist of a central nucleus with “arms” that trail behind while the galaxy rotates The Milky Way is a spiral ...
Physics@Brock - Brock University
... and electromagnetic radiation, but all the heavier elements were created inside stars. When the early massive stars “died” (their lifetimes were very short due to their enormous mass) the resulting explosions (“supernovae”) spread heavier elements throughout the universe, where some of them coalesce ...
... and electromagnetic radiation, but all the heavier elements were created inside stars. When the early massive stars “died” (their lifetimes were very short due to their enormous mass) the resulting explosions (“supernovae”) spread heavier elements throughout the universe, where some of them coalesce ...
Locating things in the Sky
... We also have a need for a different co-ordinate system in astronomy to describe where things are in the sky... We use a system called Right Ascention (RA) and Declination (dec). RA is like longitute and describes how far round an object is, and declination is like latitude and describes how far up ...
... We also have a need for a different co-ordinate system in astronomy to describe where things are in the sky... We use a system called Right Ascention (RA) and Declination (dec). RA is like longitute and describes how far round an object is, and declination is like latitude and describes how far up ...
Malmquist bias
The Malmquist bias is an effect in observational astronomy which leads to the preferential detection of intrinsically bright objects. It was first described in 1922 by Swedish astronomer Gunnar Malmquist (1893–1982), who then greatly elaborated upon this work in 1925. In statistics, this bias is referred to as a selection bias and affects the survey results in a brightness limited survey, where stars below a certain apparent brightness are not included. Since observed stars and galaxies appear dimmer when farther away, the brightness that is measured will fall off with distance until their brightness falls below the observational threshold. Objects which are more luminous, or intrinsically brighter, can be observed at a greater distance, creating a false trend of increasing intrinsic brightness, and other related quantities, with distance. This effect has led to many spurious claims in the field of astronomy. Properly correcting for these effects has become an area of great focus.