The Stars - University of Redlands
... Mizar, 88 light years distant, is the middle star in the handle of the Big Dipper. It was the first binary star system to be imaged with a telescope. Spectroscopic observations show periodic Doppler shifts in the spectra of Mizar A and B, indicating that they are each binary stars. But they were too ...
... Mizar, 88 light years distant, is the middle star in the handle of the Big Dipper. It was the first binary star system to be imaged with a telescope. Spectroscopic observations show periodic Doppler shifts in the spectra of Mizar A and B, indicating that they are each binary stars. But they were too ...
The Life Cycle of Stars Webquest
... E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes stars shine. 3. You will also begin to understand the forces involved in stars that maintain this nuclear reaction and how these forces change as the star ages. 4. You will explo ...
... E = MC2 and learn how mass in the form of hydrogen atoms is converted to helium and causes a release of energy that makes stars shine. 3. You will also begin to understand the forces involved in stars that maintain this nuclear reaction and how these forces change as the star ages. 4. You will explo ...
Background Information - Eu-Hou
... In order to plot a HR diagram, the temperature and luminosity of the stars need to be known. The simplest indication of a star’s temperature is its colour. A star’s colour is simply a measure of the amount of light from the star in one filter compared to another. The most common colour system is B-V ...
... In order to plot a HR diagram, the temperature and luminosity of the stars need to be known. The simplest indication of a star’s temperature is its colour. A star’s colour is simply a measure of the amount of light from the star in one filter compared to another. The most common colour system is B-V ...
Star Formation
... is based on surface temperature, not on spectral content O, A, B were erroneously called ‘early types’ and the F, G, K, and M were ‘late types’ Sub categories B0, B1…B9, A0…A9, etc. ...
... is based on surface temperature, not on spectral content O, A, B were erroneously called ‘early types’ and the F, G, K, and M were ‘late types’ Sub categories B0, B1…B9, A0…A9, etc. ...
1. absolute brightness -
... to their spectral characteristics. • They are classified according to the spectral lines observed, originally the amount of Hydrogen the lines seemed to indicate. • Today they are ranked in order of surface temperature. O, B, A, F, G, K, M from hottest to coolest. ...
... to their spectral characteristics. • They are classified according to the spectral lines observed, originally the amount of Hydrogen the lines seemed to indicate. • Today they are ranked in order of surface temperature. O, B, A, F, G, K, M from hottest to coolest. ...
Our Star - the Sun
... apparent shift of a star against the background stars observed as the Earth moves along its orbit Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Earth-based telescopes Stellar parallaxes can only be measured for stars ...
... apparent shift of a star against the background stars observed as the Earth moves along its orbit Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Earth-based telescopes Stellar parallaxes can only be measured for stars ...
Document
... • We define our age by trips around the Sun. • How many trips of Sun around Milky Way? R = 8.5 kpc V = 220km/s P = 2.5x108 yrs ...
... • We define our age by trips around the Sun. • How many trips of Sun around Milky Way? R = 8.5 kpc V = 220km/s P = 2.5x108 yrs ...
IB_Op_F_04 - Effectsmeister
... radially approaching the earth the light spectrum will be blueshifted (all wavelengths become smaller) and if a star is moving radially away from the earth, the light spectrum will be redshifted (all wavelengths become larger). Use the four positions in the figure under part 2 to predict which star( ...
... radially approaching the earth the light spectrum will be blueshifted (all wavelengths become smaller) and if a star is moving radially away from the earth, the light spectrum will be redshifted (all wavelengths become larger). Use the four positions in the figure under part 2 to predict which star( ...
First Exam - University of Iowa Astrophysics
... 26. You look up in the night sky and see the planet Jupiter, the planet Mars, and the Moon very close together. You know that they are located in or close to one of the following. Which is it? (a) the ecliptic ∗ (b) the celestial equator (c) the zenith (d) the north celestial pole (e) the constellat ...
... 26. You look up in the night sky and see the planet Jupiter, the planet Mars, and the Moon very close together. You know that they are located in or close to one of the following. Which is it? (a) the ecliptic ∗ (b) the celestial equator (c) the zenith (d) the north celestial pole (e) the constellat ...
Night Sky Checklist April–May–June Unaided Eye Astronomy
... Arcturus is the brightest star in Boötes, the Herdsman. It is a red giant star about 25 times bigger than the sun, at a distance of about 36 light years. It has a distinctly reddish-orange color and is the fourth brightest star in the night time sky (and the third brightest that can be seen from Aca ...
... Arcturus is the brightest star in Boötes, the Herdsman. It is a red giant star about 25 times bigger than the sun, at a distance of about 36 light years. It has a distinctly reddish-orange color and is the fourth brightest star in the night time sky (and the third brightest that can be seen from Aca ...
Stellar Evolution and the HR Diagram – Study Guide
... c. Which is brighter, the sun or a white dwarf? The Sun (but not as hot) d. Is Vega brighter than our sun? Yes e. Is Antares hotter than our sun? No, it’s a giant, class K or M 22. Stars that move off the main sequence first move to the _Giant_ region of the HR diagram. These stars are fusing __heli ...
... c. Which is brighter, the sun or a white dwarf? The Sun (but not as hot) d. Is Vega brighter than our sun? Yes e. Is Antares hotter than our sun? No, it’s a giant, class K or M 22. Stars that move off the main sequence first move to the _Giant_ region of the HR diagram. These stars are fusing __heli ...
Constellations and Asterisms
... For that reason, people are more likely to say that the Big Dipper, the brightest 7 stars of Ursa Major located in the upper left corner of the constellation, is actually the constellation in this area, though they are mistaken. The Big Dipper is an asterism, a pattern of stars most modernly recogni ...
... For that reason, people are more likely to say that the Big Dipper, the brightest 7 stars of Ursa Major located in the upper left corner of the constellation, is actually the constellation in this area, though they are mistaken. The Big Dipper is an asterism, a pattern of stars most modernly recogni ...
Homework #2
... kind comes from the death of a massive star and is more common than the brighter Type Ia supernovae discussed so far in class). At what distance, in parsecs, would that supernova have a brightness equal to that of the sun? At what distance would it be 10 times fainter than the sun? Compare that to t ...
... kind comes from the death of a massive star and is more common than the brighter Type Ia supernovae discussed so far in class). At what distance, in parsecs, would that supernova have a brightness equal to that of the sun? At what distance would it be 10 times fainter than the sun? Compare that to t ...
The Magnitude scale
... The Magnitude scale Relative brightness on a backwards (!) log scale. Dates to Hipparchus. E.g., apparent relative luminosities of stars a & b are given by, ...
... The Magnitude scale Relative brightness on a backwards (!) log scale. Dates to Hipparchus. E.g., apparent relative luminosities of stars a & b are given by, ...
Chapter16
... main sequence — The region in an H-R diagram occupied by stars that are fusing hydrogen into helium in their cores. The main sequence runs from hot, luminous stars to cool, dim stars. mass–luminosity relation — The relationship between luminosity and mass for stars. More massive stars have greater l ...
... main sequence — The region in an H-R diagram occupied by stars that are fusing hydrogen into helium in their cores. The main sequence runs from hot, luminous stars to cool, dim stars. mass–luminosity relation — The relationship between luminosity and mass for stars. More massive stars have greater l ...
Constellation Part II readingConstellation Part II reading(es)
... The stars are distant objects. Their distances vary, but they are all very far away. Excluding our Sun, the nearest star, Proxima Centauri, is more than 4 light years away. As Earth spins on its axis, we, as Earth-bound observers, spin past this background of distant stars. As Earth spins, the stars ...
... The stars are distant objects. Their distances vary, but they are all very far away. Excluding our Sun, the nearest star, Proxima Centauri, is more than 4 light years away. As Earth spins on its axis, we, as Earth-bound observers, spin past this background of distant stars. As Earth spins, the stars ...
Our Community`s Place Among the Stars
... The outer layers of the star expand and cool The star now uses helium as fuel ...
... The outer layers of the star expand and cool The star now uses helium as fuel ...
Level 4 Constellations North Star, South Star
... Next to the Big Dipper, Orion is the most well-known constellation of all. Its shape and group of bright stars dominate the winter sky. It contains more bright stars clustered together than any other single group. To the ancients, the figure represented the giant Orion, placed in the heavens, in a h ...
... Next to the Big Dipper, Orion is the most well-known constellation of all. Its shape and group of bright stars dominate the winter sky. It contains more bright stars clustered together than any other single group. To the ancients, the figure represented the giant Orion, placed in the heavens, in a h ...
Astro 210 Lecture 4 Sept. 4, 2013 Announcements: • PS 1 available
... Recall: color related to Temperature Dr. Wien’s amazing law says colder: redder; hotter: bluer ...
... Recall: color related to Temperature Dr. Wien’s amazing law says colder: redder; hotter: bluer ...
BAS Visit to the Norman Lockyer Observatory, October 2015
... Mira variables. There are between 6,000 to 7,000 known stars belonging to this group. They are all red giants whose surfaces oscillate in such a way as to cause variations in brightness over periods ranging from 80 to 1,000 days. Mira was the first non-supernova variable star discovered, and is beli ...
... Mira variables. There are between 6,000 to 7,000 known stars belonging to this group. They are all red giants whose surfaces oscillate in such a way as to cause variations in brightness over periods ranging from 80 to 1,000 days. Mira was the first non-supernova variable star discovered, and is beli ...
Science Assessment Stage H--Performance Standard 12F-H
... Time requirements: 1 class period for initial star card activity; 1-2 class period(s) for preparation of graphic display for star data groupings; 1 class period for class presentation. Resources: • Star cards printed on stock or construction paper (yellow, orange, white, red, light and dark blue). • ...
... Time requirements: 1 class period for initial star card activity; 1-2 class period(s) for preparation of graphic display for star data groupings; 1 class period for class presentation. Resources: • Star cards printed on stock or construction paper (yellow, orange, white, red, light and dark blue). • ...
Branches of Earth Science
... Light Year- Astronomers use light years to measure the distances ______________ stars o A light year is the distance that light ______________ in one year 9,460,730,472,580.8 km 5,878,630,000,000 miles Parallax- the apparent change in the ______________ of a star in the sky. o The change is due ...
... Light Year- Astronomers use light years to measure the distances ______________ stars o A light year is the distance that light ______________ in one year 9,460,730,472,580.8 km 5,878,630,000,000 miles Parallax- the apparent change in the ______________ of a star in the sky. o The change is due ...