H-R Diagrams
... An H-R Diagram is… • A graph of stars’ BRIGHTNESS and TEMPERATURE – It also shows color since color is related to temperature – It was made by two astronomers who plotted the data for thousands of stars and noticed some trends. ...
... An H-R Diagram is… • A graph of stars’ BRIGHTNESS and TEMPERATURE – It also shows color since color is related to temperature – It was made by two astronomers who plotted the data for thousands of stars and noticed some trends. ...
Stars
... motion, but their distances are so great that their relative changes in position become apparent only over the centuries. The number of stars visible to the naked eye from earth has been estimated to total 8000, of which 4000 are visible from the northern hemisphere and 4000 from the southern hemisp ...
... motion, but their distances are so great that their relative changes in position become apparent only over the centuries. The number of stars visible to the naked eye from earth has been estimated to total 8000, of which 4000 are visible from the northern hemisphere and 4000 from the southern hemisp ...
Vocabulary Review
... a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form ...
... a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form ...
Click here to see all test questions at once.
... degrees). The yellow and orange stars are medium temperature. The blue and white stars are hottest (about 5,000 degrees). The hotter the star the brighter it is. ...
... degrees). The yellow and orange stars are medium temperature. The blue and white stars are hottest (about 5,000 degrees). The hotter the star the brighter it is. ...
Apparent magnitude is the brightness of a star as it appears
... Apparent magnitude is the brightness of a star as it appears from Earth. This brightness depends partly on how far away the star is. Absolute magnitude describes the actual brightness of a star without considering its distance from the observer. The absolute magnitude of stars is measured on a Scale ...
... Apparent magnitude is the brightness of a star as it appears from Earth. This brightness depends partly on how far away the star is. Absolute magnitude describes the actual brightness of a star without considering its distance from the observer. The absolute magnitude of stars is measured on a Scale ...
Characteristics of Stars
... apparent shift in the position of an object when viewed from two different positions. • Knowing the angle that the star’s position changes and the size of Earth’s orbit, astronomers can calculate the distance of the star from earth. ...
... apparent shift in the position of an object when viewed from two different positions. • Knowing the angle that the star’s position changes and the size of Earth’s orbit, astronomers can calculate the distance of the star from earth. ...
Structure of the Universe
... energy? Stars produce energy by combining smaller elements to form a larger one, specifically two hydrogen atoms form a helium atom, ...
... energy? Stars produce energy by combining smaller elements to form a larger one, specifically two hydrogen atoms form a helium atom, ...
chap17_f03_phints
... A star is determined to have a surface temperature twice that of the Sun, and a luminosity 64X greater. What is this star’s radius, expressed in solar units ? HINT: Problem 4 is an application of the radius – luminosity – temperature relation for stars. Given two of these values, the third is found ...
... A star is determined to have a surface temperature twice that of the Sun, and a luminosity 64X greater. What is this star’s radius, expressed in solar units ? HINT: Problem 4 is an application of the radius – luminosity – temperature relation for stars. Given two of these values, the third is found ...
Figure 10-6 The same star field shown in Figure
... Hipparchus misjudged the magnitudes of some of the brighter stars, however. When the magnitude scale was extended and expressed by a mathematical formula, it developed that the brighter stars are brighter than those of the first magnitude; indeed they are even brighter than those of zero magnitude. ...
... Hipparchus misjudged the magnitudes of some of the brighter stars, however. When the magnitude scale was extended and expressed by a mathematical formula, it developed that the brighter stars are brighter than those of the first magnitude; indeed they are even brighter than those of zero magnitude. ...
Small Wonders: Ursa Minor
... realize that the front/pointer stars of the Big Dipper (recognized the world over) point towards Polaris, many non astronomers who look up still manage to link the "little dipper" with M45 - the Pleiades. The true little dipper's origins are somewhat shrouded in mystery, but there's evidence that it ...
... realize that the front/pointer stars of the Big Dipper (recognized the world over) point towards Polaris, many non astronomers who look up still manage to link the "little dipper" with M45 - the Pleiades. The true little dipper's origins are somewhat shrouded in mystery, but there's evidence that it ...
The Hot-plate Model of a Star Model of Stars— 3 Oct
... brightness with all stars placed at same distance ...
... brightness with all stars placed at same distance ...
Life Cycle of Stars Flipbook Assignment
... 4. What happens that initiates the birth of a star? 5. Explain what happens in nuclear fusion? 6. What is going to happen to our Sun’s magnitude and temperature when it goes to its next stage? 7. What is the final stage of our Sun’s life? 8. What will happen to our Sun’s magnitude and temperature wh ...
... 4. What happens that initiates the birth of a star? 5. Explain what happens in nuclear fusion? 6. What is going to happen to our Sun’s magnitude and temperature when it goes to its next stage? 7. What is the final stage of our Sun’s life? 8. What will happen to our Sun’s magnitude and temperature wh ...
Stars
... Apparent magnitude: brightness as seen from Earth Absolute magnitude: brightness if it were a standard distance from Earth ...
... Apparent magnitude: brightness as seen from Earth Absolute magnitude: brightness if it were a standard distance from Earth ...
Sky Notes - April 2012 - North Devon Astronomical Society
... pulsation of the star itself. In the case of Delta Cephei, the star’s brightness ranges between magnitude +3.5 and +4.4 and occurs over a period of around five and a half days. Cepheids are important as their variability is very regular, and this enables astronomers to use them as ‘standard candles’ ...
... pulsation of the star itself. In the case of Delta Cephei, the star’s brightness ranges between magnitude +3.5 and +4.4 and occurs over a period of around five and a half days. Cepheids are important as their variability is very regular, and this enables astronomers to use them as ‘standard candles’ ...
Old Sample Exam #2
... Each answer worth 5 points except last which is worth 10 points. All constants in mks units unless otherwise specified: c=3x108 G=6.7x10-11 h=6.6x10-34 =5.7x10-8 REarth=6400km ...
... Each answer worth 5 points except last which is worth 10 points. All constants in mks units unless otherwise specified: c=3x108 G=6.7x10-11 h=6.6x10-34 =5.7x10-8 REarth=6400km ...
Chapter 1 Daily Note Sheets Completed Power Point
... 1. is to section sky to identify the location of objects. 2. predicting future events 3. Entertainment – telling stories ...
... 1. is to section sky to identify the location of objects. 2. predicting future events 3. Entertainment – telling stories ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.