Lecture 19 Brightness Units
... = 10-11 × (7.8/5.5x10-6 )2 = 24 • Bottom Line: By combining brightnesses and distances from parallax of nearby stars, find stellar luminosities have huge range: L(star) = 10-5 - 106 Lsun • This means a star can have a large brightness (low magnitude) if it is close, or if it is intrinsically luminou ...
... = 10-11 × (7.8/5.5x10-6 )2 = 24 • Bottom Line: By combining brightnesses and distances from parallax of nearby stars, find stellar luminosities have huge range: L(star) = 10-5 - 106 Lsun • This means a star can have a large brightness (low magnitude) if it is close, or if it is intrinsically luminou ...
ppt
... • The Hubble constant changes as a function of time depending on the precise cosmological models as the expansion of the universe slows due to gravitational attraction of the matter within it • The current value of the Hubble constant is hotly debated, with two opposing camps generally getting value ...
... • The Hubble constant changes as a function of time depending on the precise cosmological models as the expansion of the universe slows due to gravitational attraction of the matter within it • The current value of the Hubble constant is hotly debated, with two opposing camps generally getting value ...
Phobos
... it from Ptolemy in his work called the ‘Algamest’ (C.151 BCE.) He in turn took it from the poetic work of Aratos called ‘The Phaenomena’ (275 BCE.) The information for his work was taken from the list of Eudoxus of Knidos (403 to 350 BC). Where it originated from is anyone’s guess, but it is certain ...
... it from Ptolemy in his work called the ‘Algamest’ (C.151 BCE.) He in turn took it from the poetic work of Aratos called ‘The Phaenomena’ (275 BCE.) The information for his work was taken from the list of Eudoxus of Knidos (403 to 350 BC). Where it originated from is anyone’s guess, but it is certain ...
Study Guide for 3RD Astronomy Exam
... Identify the types of stars that will experience a core-collapse (Type II) supernova. Identify the composition of the core of a star about to experience a core-collapse (Type II) supernova. Describe two reasons why type II supernovas are very useful standard candles. Describe the impact of supernova ...
... Identify the types of stars that will experience a core-collapse (Type II) supernova. Identify the composition of the core of a star about to experience a core-collapse (Type II) supernova. Describe two reasons why type II supernovas are very useful standard candles. Describe the impact of supernova ...
Ch 20 Notes Stars
... birth, through development, and then death • About 90% of the stars in our galaxy, including the sun, are around midlife • They are converting hydrogen into helium in their interiors (with nuclear fusion!). ...
... birth, through development, and then death • About 90% of the stars in our galaxy, including the sun, are around midlife • They are converting hydrogen into helium in their interiors (with nuclear fusion!). ...
The Temperature of Stars
... – Stars moving toward Earth are shifted slightly toward blue, which is called blue shift. – Stars moving away from Earth are shifted slightly toward red, which is called red shift. ...
... – Stars moving toward Earth are shifted slightly toward blue, which is called blue shift. – Stars moving away from Earth are shifted slightly toward red, which is called red shift. ...
ppt document
... When the hydrogen starts to run out in the core, the explosive energy production of nuclear fusion no longer can balance the gravitational tendency to collapse, and so the core of the star will again start to collapse while hydrogen is still burning on the outside of the core. This gravity collapse ...
... When the hydrogen starts to run out in the core, the explosive energy production of nuclear fusion no longer can balance the gravitational tendency to collapse, and so the core of the star will again start to collapse while hydrogen is still burning on the outside of the core. This gravity collapse ...
PPT
... • The overall range of stellar masses runs from 0.08 times the mass of the Sun to about 150 times the mass of the Sun. • Masses are only known for stars that form binary systems, but about half of all stars are in fact in binary systems! – 0.08 MSun is approximately 80 MJupiter ...
... • The overall range of stellar masses runs from 0.08 times the mass of the Sun to about 150 times the mass of the Sun. • Masses are only known for stars that form binary systems, but about half of all stars are in fact in binary systems! – 0.08 MSun is approximately 80 MJupiter ...
Seating Chart for Final Exam PHOTO ID REQUIRED! SIT IN YOUR ASSIGNED ROW!
... Slide 3: You must work your way out rung by rung, starting with the parallax method. How does the parallax method work? Pulsating variables used to get position of center of our galaxy + distance to M31, etc. What are pulsating variables and how are they used? Hubble’s law: v is measured from Dopple ...
... Slide 3: You must work your way out rung by rung, starting with the parallax method. How does the parallax method work? Pulsating variables used to get position of center of our galaxy + distance to M31, etc. What are pulsating variables and how are they used? Hubble’s law: v is measured from Dopple ...
level 1
... used in astronomy. Create an infographic for museum visitors that shows these distances in terms that make sense to them. Design an Excel spreadsheet to prepare the data, using the distances provided in Stellar Performance. Create two new columns and apply the appropriate formulae to convert distanc ...
... used in astronomy. Create an infographic for museum visitors that shows these distances in terms that make sense to them. Design an Excel spreadsheet to prepare the data, using the distances provided in Stellar Performance. Create two new columns and apply the appropriate formulae to convert distanc ...
August 29 - Astronomy
... the only light that we can see is the light that has had time to reach us. The farthest we can see is therefore 14 billion light years away, anything farther the light has not had enough time to reach us. ...
... the only light that we can see is the light that has had time to reach us. The farthest we can see is therefore 14 billion light years away, anything farther the light has not had enough time to reach us. ...
Take Home #1 Complete the following on your own paper. Do not
... 14) Which of the following is an example of technology? A. the Moon's gravitational constant D. Hubble photographs of the Moon B. chemical composition of Moon rocks E. phases of the Moon C. the moon's orbit 15) A prediction made in the Big Bang Theory is that the entire universe should be filled wit ...
... 14) Which of the following is an example of technology? A. the Moon's gravitational constant D. Hubble photographs of the Moon B. chemical composition of Moon rocks E. phases of the Moon C. the moon's orbit 15) A prediction made in the Big Bang Theory is that the entire universe should be filled wit ...
Take Home #1 Complete the following on your own paper. Do not
... 14) Which of the following is an example of technology? A. the Moon's gravitational constant D. Hubble photographs of the Moon B. chemical composition of Moon rocks E. phases of the Moon C. the moon's orbit 15) A prediction made in the Big Bang Theory is that the entire universe should be filled wit ...
... 14) Which of the following is an example of technology? A. the Moon's gravitational constant D. Hubble photographs of the Moon B. chemical composition of Moon rocks E. phases of the Moon C. the moon's orbit 15) A prediction made in the Big Bang Theory is that the entire universe should be filled wit ...
As far as - Sangeeta Malhotra
... performed spectroscopy on the HUDF target region between October 2002 and January 2003, using about 10 percent of the time that went into imaging. We quickly discovered that GRAPES is not just an extragalactic survey, for the HUDF distance scale starts within our own galaxy. The closest object we ha ...
... performed spectroscopy on the HUDF target region between October 2002 and January 2003, using about 10 percent of the time that went into imaging. We quickly discovered that GRAPES is not just an extragalactic survey, for the HUDF distance scale starts within our own galaxy. The closest object we ha ...
ANTARES - National Optical Astronomy Observatory
... The explosive disruption of a star, either the thermonuclear explosion of a white dwarf or the core-collapse of a massive star, is a spectacular event. They are highly energetic and thus bright and visible over cosmological distances. Supernovae help us to understand the end states of stellar evolut ...
... The explosive disruption of a star, either the thermonuclear explosion of a white dwarf or the core-collapse of a massive star, is a spectacular event. They are highly energetic and thus bright and visible over cosmological distances. Supernovae help us to understand the end states of stellar evolut ...
every star in the cluster.
... This is just one relatively brief stage on the way to stellar demise. The globular cluster in the figure just above has a lot of red giants, continually forming from evolving stars near the turnoff. But there were originally many stars that were even more massive, that became red giants for a time, ...
... This is just one relatively brief stage on the way to stellar demise. The globular cluster in the figure just above has a lot of red giants, continually forming from evolving stars near the turnoff. But there were originally many stars that were even more massive, that became red giants for a time, ...
Slide 1
... floating astro-observatory began to relay back to Earth, incredible snap shots of the 'final frontier' it was perusing. Recently, astronauts voted on the top photographs taken by Hubble in its 16-year journey so far. Enjoy! ...
... floating astro-observatory began to relay back to Earth, incredible snap shots of the 'final frontier' it was perusing. Recently, astronauts voted on the top photographs taken by Hubble in its 16-year journey so far. Enjoy! ...
What Is a Star
... Stars are not alone in space. Stars are found in clusters (groups) called galaxies. Our sun is just one of billions of stars in the Milky Way Galaxy. There are many billions of galaxies in space. How many stars are there? Scientists think that there are about three hundred sextillion stars in space! ...
... Stars are not alone in space. Stars are found in clusters (groups) called galaxies. Our sun is just one of billions of stars in the Milky Way Galaxy. There are many billions of galaxies in space. How many stars are there? Scientists think that there are about three hundred sextillion stars in space! ...
4th Six Weeks Review key
... 31. Fusion occurs when ___hydrogen_ atoms fuse to form __helium____ with the resulting change in mass releases energy. 32. What type of star is our sun? (circle one) MASSIVE or AVERAGE 33. Our sun is a _____main sequence star and is the color ___yellow___. 34. Where is our sun located within the Mil ...
... 31. Fusion occurs when ___hydrogen_ atoms fuse to form __helium____ with the resulting change in mass releases energy. 32. What type of star is our sun? (circle one) MASSIVE or AVERAGE 33. Our sun is a _____main sequence star and is the color ___yellow___. 34. Where is our sun located within the Mil ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... Separated at Birth: Finding our Sun’s Long-Lost Siblings? Stars are born in groups or clusters when a cold giant molecular cloud collapses under its own gravitational force. If many stars form all at once—that is, if star formation efficiency is high—they will stay together as a gravitationally boun ...
... Separated at Birth: Finding our Sun’s Long-Lost Siblings? Stars are born in groups or clusters when a cold giant molecular cloud collapses under its own gravitational force. If many stars form all at once—that is, if star formation efficiency is high—they will stay together as a gravitationally boun ...
talk / PPT / 1.6 MB
... M/LB,V,I = '1 and a bit'. Next comes infra-red (J, H, K) from 2MASS. Work in progress. Galactic chemical evolutionary models of Solar neighbourhood fit the data very well. Models gain street credit! Are there still at least as many baryons to be found in the Milky Way? ...
... M/LB,V,I = '1 and a bit'. Next comes infra-red (J, H, K) from 2MASS. Work in progress. Galactic chemical evolutionary models of Solar neighbourhood fit the data very well. Models gain street credit! Are there still at least as many baryons to be found in the Milky Way? ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.