Document
... spiral galaxy – 100,000 light years wide – 16,000 light years thick at the centre – has three distinct spiral arms - Sun is positioned in one of these arms about two-thirds of the way from the galactic center, at a distance of about 30,000 lightyears The Andromeda Galaxy, M31, is the nearest major ...
... spiral galaxy – 100,000 light years wide – 16,000 light years thick at the centre – has three distinct spiral arms - Sun is positioned in one of these arms about two-thirds of the way from the galactic center, at a distance of about 30,000 lightyears The Andromeda Galaxy, M31, is the nearest major ...
The Zodiac - Alchemical.org
... Sumerians had seen these stars as Enki, their river god. He was the ruler of the waters of the Euphrates. The Assyrians saw him as half fish, half man, Oannes, god of wisdom. The Egyptians associated the constellation with the Nile. The ancient Greeks first saw these stars as Pan, half man, half goa ...
... Sumerians had seen these stars as Enki, their river god. He was the ruler of the waters of the Euphrates. The Assyrians saw him as half fish, half man, Oannes, god of wisdom. The Egyptians associated the constellation with the Nile. The ancient Greeks first saw these stars as Pan, half man, half goa ...
Stellar Magnitudes and Distances
... Concept Check! • If Polaris has m = +1.97 and M = -3.64, how far away is it? Distance = 10[ (1.97-(-3.64)+5) / 5 ] = 10[ 10.61 / 5 ] ...
... Concept Check! • If Polaris has m = +1.97 and M = -3.64, how far away is it? Distance = 10[ (1.97-(-3.64)+5) / 5 ] = 10[ 10.61 / 5 ] ...
Stars Study Guide KEY
... Originally, the universe was tiny, hot, and dense. (Everything was compressed together into a small ball.) Then, an enormous explosion threw matter in all directions. (The matter eventually formed everything that we now see.) 18. What evidence is used to support the theory? (Tell two) Galaxies are s ...
... Originally, the universe was tiny, hot, and dense. (Everything was compressed together into a small ball.) Then, an enormous explosion threw matter in all directions. (The matter eventually formed everything that we now see.) 18. What evidence is used to support the theory? (Tell two) Galaxies are s ...
HR Diagram Lab
... Purpose: In this lab we will investigate the relationship between the temperature, brightness and diameter of stars. Introduction The H-R Diagram is a tool that astronomers use to classify stars based on their luminosity, magnitude, temperature, spectral class and evolutionary stage. The H-R Diagram ...
... Purpose: In this lab we will investigate the relationship between the temperature, brightness and diameter of stars. Introduction The H-R Diagram is a tool that astronomers use to classify stars based on their luminosity, magnitude, temperature, spectral class and evolutionary stage. The H-R Diagram ...
Stars - winterk
... followed by an outward projection of particles • Depending of the star’s size, its collapse is either in the form of a planetary nebula or a supernova • After that, it then becomes one of the following: 1) White dwarf (small/medium-sized stars) 2) Neutron star (large stars) 3) Black hole (extremely ...
... followed by an outward projection of particles • Depending of the star’s size, its collapse is either in the form of a planetary nebula or a supernova • After that, it then becomes one of the following: 1) White dwarf (small/medium-sized stars) 2) Neutron star (large stars) 3) Black hole (extremely ...
Station A Star Charts I
... D7. (2 pts) One of the most luminous stars in the Milky Way is Cygnus OB2#12. Based on its size and distance from the Earth astronomers expect that its apparent magnitude should be 1.5. However, interstellar dust causes its apparent magnitude to be 11.4. How many times brighter (or fainter) does the ...
... D7. (2 pts) One of the most luminous stars in the Milky Way is Cygnus OB2#12. Based on its size and distance from the Earth astronomers expect that its apparent magnitude should be 1.5. However, interstellar dust causes its apparent magnitude to be 11.4. How many times brighter (or fainter) does the ...
Answer titese questions on a piece of loose leaf paper.
... S. On what two things does the absolute brightness of a star depend? 9. "What unit do astronomers use to measure distances between stars? • 10. Astronomers often use to measure distances to nearby stars. Qiini: Think about the thumb demo we didin class.) I I . The Hcrczspiung-Russcll diagram shows t ...
... S. On what two things does the absolute brightness of a star depend? 9. "What unit do astronomers use to measure distances between stars? • 10. Astronomers often use to measure distances to nearby stars. Qiini: Think about the thumb demo we didin class.) I I . The Hcrczspiung-Russcll diagram shows t ...
Astrophysics E1. This question is about stars.
... E1. This question is about the relative population density of stars and galaxies. The number of stars around the Sun, within a distance of 17 ly, is 75. The number of galaxies in the local group, within a distance of 4.0 x 106 ly from the Sun, is 26. (a) Calculate the average population density, per ...
... E1. This question is about the relative population density of stars and galaxies. The number of stars around the Sun, within a distance of 17 ly, is 75. The number of galaxies in the local group, within a distance of 4.0 x 106 ly from the Sun, is 26. (a) Calculate the average population density, per ...
PPT Format - HubbleSOURCE
... According to this definition, almost all stars are binaries (or multiples). The Sun is one of the exceptions. ...
... According to this definition, almost all stars are binaries (or multiples). The Sun is one of the exceptions. ...
Part 1
... Measuring Brightness: History • Photometry - the measure of brightness • Hipparchus (150 B.C.) – catalog of 1000 stars – included position & brightness – Magnitude = brightness • brightest stars were first magnitude • faintest stars were sixth magnitude • estimated by eye (logarithmic response) ...
... Measuring Brightness: History • Photometry - the measure of brightness • Hipparchus (150 B.C.) – catalog of 1000 stars – included position & brightness – Magnitude = brightness • brightest stars were first magnitude • faintest stars were sixth magnitude • estimated by eye (logarithmic response) ...
Star Magnitude - ScienceEducationatNewPaltz
... magnitude. Dimmer stars are zero or positive numbers. The larger the number means the dimmer the star is. For example, a star -1 magnitude is brighter than a star 0 magnitude. A star 0 magnitude is brighter than a star 1 magnitude. A star 1 magnitude is brighter than a star 2 magnitude. A star 4 mag ...
... magnitude. Dimmer stars are zero or positive numbers. The larger the number means the dimmer the star is. For example, a star -1 magnitude is brighter than a star 0 magnitude. A star 0 magnitude is brighter than a star 1 magnitude. A star 1 magnitude is brighter than a star 2 magnitude. A star 4 mag ...
Characteristics of Stars
... Luminosity • Luminosity – how bright a star is • Apparent magnitude – how bright a star appears to an observer on Earth – Stars can appear to be the same brightness to us on Earth even though they may not be (one may be farther away from us than the other) ...
... Luminosity • Luminosity – how bright a star is • Apparent magnitude – how bright a star appears to an observer on Earth – Stars can appear to be the same brightness to us on Earth even though they may not be (one may be farther away from us than the other) ...
Additional Images
... wave and an expanding shell. The first bright nova of the 20th century and the first to be subjected to detailed spectroscopy and photometry, Nova Persei 1901 reached a maximum brightness of 0.2m and declined very rapidly thereafter to its current minimum of 13.1. GK Per is unique among classical no ...
... wave and an expanding shell. The first bright nova of the 20th century and the first to be subjected to detailed spectroscopy and photometry, Nova Persei 1901 reached a maximum brightness of 0.2m and declined very rapidly thereafter to its current minimum of 13.1. GK Per is unique among classical no ...
Basic Properties of the Stars
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
HR Diagram of One Solar Mass Evolution
... • After formation white dwarf continues to cool – no energy sources • Coolest “black dwarf” is ~6000K – age of 12 billion years ...
... • After formation white dwarf continues to cool – no energy sources • Coolest “black dwarf” is ~6000K – age of 12 billion years ...
Sample final exam
... 19. On page 184, the text states “Understand the fact that we [the Milky Way] are moving toward M31 and that the Large Magellenic Cloud [LMC] is moving toward us.” First, explain what we observe about these galaxies (M31, the LMC) that shows they are moving in the directions the text states. I thoug ...
... 19. On page 184, the text states “Understand the fact that we [the Milky Way] are moving toward M31 and that the Large Magellenic Cloud [LMC] is moving toward us.” First, explain what we observe about these galaxies (M31, the LMC) that shows they are moving in the directions the text states. I thoug ...
Stars Chapter 21
... light from a distant star into its characteristic color • SPECTRUM: the band of colors that forms as light passes through a prism • Used to see if galaxies are moving away or toward the earth ...
... light from a distant star into its characteristic color • SPECTRUM: the band of colors that forms as light passes through a prism • Used to see if galaxies are moving away or toward the earth ...
luminosity1
... is made of steel and is being heated from inside. We move a light collector (maybe a huge bundle of fiber optic cables) that is 1meter X 1meter, right up close to one of the surfaces so we can capture all the light being emitted from that side of the cube. The cube begins to glow, and we send the li ...
... is made of steel and is being heated from inside. We move a light collector (maybe a huge bundle of fiber optic cables) that is 1meter X 1meter, right up close to one of the surfaces so we can capture all the light being emitted from that side of the cube. The cube begins to glow, and we send the li ...
A little bit more to do. Stefan
... is made of steel and is being heated from inside. We move a light collector (maybe a huge bundle of fiber optic cables) that is 1meter X 1meter, right up close to one of the surfaces so we can capture all the light being emitted from that side of the cube. The cube begins to glow, and we send the li ...
... is made of steel and is being heated from inside. We move a light collector (maybe a huge bundle of fiber optic cables) that is 1meter X 1meter, right up close to one of the surfaces so we can capture all the light being emitted from that side of the cube. The cube begins to glow, and we send the li ...
The Changing Heavens Over Time Key Commands Constellations
... 5. Find the year when Polaris is furthest from the pole to the closest thousand years. [Hint: The DE will be between 40o and 50o.] This will be many thousands of years in the future, so move ahead in 2000 year increments until you get close. __________________ 6. Find the year when Polaris is back a ...
... 5. Find the year when Polaris is furthest from the pole to the closest thousand years. [Hint: The DE will be between 40o and 50o.] This will be many thousands of years in the future, so move ahead in 2000 year increments until you get close. __________________ 6. Find the year when Polaris is back a ...
Stars…Giants, Supergiants, Dwarfs….
... you that one is much larger than the other, what can you say about the relative brightnesses? ...
... you that one is much larger than the other, what can you say about the relative brightnesses? ...
Binary Stars (Professor Powerpoint)
... binaries. Eclipsing Binary stars are also referred to as Extrinsic Variable Stars. ...
... binaries. Eclipsing Binary stars are also referred to as Extrinsic Variable Stars. ...
NASC 1100
... The surface temperature also determines the line spectrum of a star. Hot stars display lines of highly ionized elements, while cool stars show molecular lines. Stars are classified by assigning a spectral type. The hottest stars are called spectral type O, followed by B, A, F, G, K, M as the surface ...
... The surface temperature also determines the line spectrum of a star. Hot stars display lines of highly ionized elements, while cool stars show molecular lines. Stars are classified by assigning a spectral type. The hottest stars are called spectral type O, followed by B, A, F, G, K, M as the surface ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.