Stars - CBSD.org
... night sky were “first order magnitude” stars. • As they got dimmer, he classified them as “second magnitude,” “third magnitude,” and so on… • He got up to magnitude 6, after which stars are too dim to be seen without a telescope. • So, a star’s apparent magnitude is essentially its brightness. – The ...
... night sky were “first order magnitude” stars. • As they got dimmer, he classified them as “second magnitude,” “third magnitude,” and so on… • He got up to magnitude 6, after which stars are too dim to be seen without a telescope. • So, a star’s apparent magnitude is essentially its brightness. – The ...
Midterm Study Game
... In the night sky, there appears to be a VERY bright object. When you look closely with a telescope (thanks to Galileo), you notice there are actually TWO stars. This is called a Binary Star System or MULTIPLE Star system. Together, describe the absolute magnitude of EACH star, compared to the appare ...
... In the night sky, there appears to be a VERY bright object. When you look closely with a telescope (thanks to Galileo), you notice there are actually TWO stars. This is called a Binary Star System or MULTIPLE Star system. Together, describe the absolute magnitude of EACH star, compared to the appare ...
Astronomy Puzzle-1
... 8. A medieval time astronomer from Gujarat and worked as a head of the department where astronomy studies were conducted in Sanskrit at Ujjain 9. Measured rotational periods of Jupiter and Mars; discovered four satellites of Saturn and the gap in Saturn’s rings. 10. First to confirm Einstein’s predi ...
... 8. A medieval time astronomer from Gujarat and worked as a head of the department where astronomy studies were conducted in Sanskrit at Ujjain 9. Measured rotational periods of Jupiter and Mars; discovered four satellites of Saturn and the gap in Saturn’s rings. 10. First to confirm Einstein’s predi ...
Stars and Galaxies
... In June 1995, scientists detected helium in the far reaches of the universe - consistent with an important aspect of the Big Bang theory that a mixture of hydrogen (75%) and helium (25%) was created at the beginning of the universe ...
... In June 1995, scientists detected helium in the far reaches of the universe - consistent with an important aspect of the Big Bang theory that a mixture of hydrogen (75%) and helium (25%) was created at the beginning of the universe ...
10.1 Introduction
... In summary, scaling from the solar parameters, the low mass end of the Main Sequence of hydrogen burning stars is expected to occur at L ∼ 10−3 L , Teff ∼ 1700 K. The value of Lmin thus derived matches observations, while that of Teff,min is about a factor of two too low (see Figure 10.5). One reas ...
... In summary, scaling from the solar parameters, the low mass end of the Main Sequence of hydrogen burning stars is expected to occur at L ∼ 10−3 L , Teff ∼ 1700 K. The value of Lmin thus derived matches observations, while that of Teff,min is about a factor of two too low (see Figure 10.5). One reas ...
Talk
... White dwarf phase, fusion completed This series of stages is similar for all stars with initial masses in the range 0.4 – 4.0 MŸ. More massive stars are able to start fusion reactions involving carbon and oxygen Ø next week. ...
... White dwarf phase, fusion completed This series of stages is similar for all stars with initial masses in the range 0.4 – 4.0 MŸ. More massive stars are able to start fusion reactions involving carbon and oxygen Ø next week. ...
Star Cycle Balloons - Communicating Astronomy With The Public
... Indicator: Describe observations accurately and carefully. Explain findings of an investigation both orally and written. ...
... Indicator: Describe observations accurately and carefully. Explain findings of an investigation both orally and written. ...
Life Cycle of Stars Activity
... Indicator: Describe observations accurately and carefully. Explain findings of an investigation both orally and written. ...
... Indicator: Describe observations accurately and carefully. Explain findings of an investigation both orally and written. ...
Astronomy Assignment #1
... 14. The star Deneb has an apparent magnitude of 1.25 and an absolute magnitude of -8.5. What two statements can you make about it, based on this data? Several statements can be made from these data. First, Deneb is easily visible by the naked eye since its apparent magnitude is much brighter than th ...
... 14. The star Deneb has an apparent magnitude of 1.25 and an absolute magnitude of -8.5. What two statements can you make about it, based on this data? Several statements can be made from these data. First, Deneb is easily visible by the naked eye since its apparent magnitude is much brighter than th ...
Oscillating White Dwarf Stars Background on White Dwarfs
... ZZ Ceti Stars – Driving Mechanism • In 1981 Don Winget, for his Ph.D. thesis found the driving mechanism. Hydrogen in the outer envelope recombines from the ionized state at an effective temperature of ~12000 K. Hydrogen in going from ionized to neutral state increases its opacity. So, this is the ...
... ZZ Ceti Stars – Driving Mechanism • In 1981 Don Winget, for his Ph.D. thesis found the driving mechanism. Hydrogen in the outer envelope recombines from the ionized state at an effective temperature of ~12000 K. Hydrogen in going from ionized to neutral state increases its opacity. So, this is the ...
Apparent Motion of the Stars Worksheet
... 1. Construct the line connecting the celestial poles from the given latitude labeling the declination of the poles ±90° dec., 2. Construct the plane of the celestial equator (seen edge-on as a line) perpendicular to the line connecting the celestial poles labeling the declination of the celestial eq ...
... 1. Construct the line connecting the celestial poles from the given latitude labeling the declination of the poles ±90° dec., 2. Construct the plane of the celestial equator (seen edge-on as a line) perpendicular to the line connecting the celestial poles labeling the declination of the celestial eq ...
Evolution of High
... high mass of the star. In an instant, electrons are force to combine with the protons in the iron nuclei to form neutrons, releasing neutrinos in the process. • The collapse of the iron core can be stopped by the neutron degenerate pressure of the newly formed neutron core, if the star is not too he ...
... high mass of the star. In an instant, electrons are force to combine with the protons in the iron nuclei to form neutrons, releasing neutrinos in the process. • The collapse of the iron core can be stopped by the neutron degenerate pressure of the newly formed neutron core, if the star is not too he ...
The Death of High Mass Stars
... Type II and Ib are thought to be the same thing, except that Ib completely lost their H rich outer layers in a strong stellar wind and then underwent core collapse. ...
... Type II and Ib are thought to be the same thing, except that Ib completely lost their H rich outer layers in a strong stellar wind and then underwent core collapse. ...
Sun and Other Stars Notes
... -Why are eclipsing binaries helpful in studying star features? - binary stars eclipse each other and are called eclipsing binaries, the light difference is measured and can determine __________________________________________ -What determines the location of a star on the main sequence? -The mass of ...
... -Why are eclipsing binaries helpful in studying star features? - binary stars eclipse each other and are called eclipsing binaries, the light difference is measured and can determine __________________________________________ -What determines the location of a star on the main sequence? -The mass of ...
Clusters of galaxies
... Science goals are build up of stellar populations with redshift (plus weak lensing). ...
... Science goals are build up of stellar populations with redshift (plus weak lensing). ...
Astronomy 122 mid Term Exam
... Here is an example that got ½ credit – again even though it’s not even close to correct: “You determine the age by looking at the stars around it. Since they are in a stellar cluster they are the same age. The age of the star is 2 times the age of the Sun.” Or “The most massive star still on the mai ...
... Here is an example that got ½ credit – again even though it’s not even close to correct: “You determine the age by looking at the stars around it. Since they are in a stellar cluster they are the same age. The age of the star is 2 times the age of the Sun.” Or “The most massive star still on the mai ...
Evolution of our Sun
... Describe a supernova. Name two types (Ia and II) of supernovas and briefly describe the events that happen in each case. Name and describe the leftovers from a supernova (expanding gas cloud and neutron star). What is meant by “standard candle”? Describe a neutron star and a pulsar. Why are supernov ...
... Describe a supernova. Name two types (Ia and II) of supernovas and briefly describe the events that happen in each case. Name and describe the leftovers from a supernova (expanding gas cloud and neutron star). What is meant by “standard candle”? Describe a neutron star and a pulsar. Why are supernov ...
Small star patterns for telescopes and binoculars Demelza Ramakers
... Four bright pairs form the northwest bow of the ring. A few fainter doubles complete the ring. In the middle of this jewel sparkle a few stars. I found it hard to find this asterism, because there are a lot of stars visible in this area. I concentrated at finding a few double stars that are closely ...
... Four bright pairs form the northwest bow of the ring. A few fainter doubles complete the ring. In the middle of this jewel sparkle a few stars. I found it hard to find this asterism, because there are a lot of stars visible in this area. I concentrated at finding a few double stars that are closely ...
Absolute Magnitudes of Supernovae
... Summary Using the Hubble Law, determine the absolute magnitudes of Type Ia supernovae occurring in distant galaxies. Background - During a three-week period in 1997, the Hubble Space Telescope was used to observe a supernova - an exploding star in a distant galaxy. These exploding stars appear sudde ...
... Summary Using the Hubble Law, determine the absolute magnitudes of Type Ia supernovae occurring in distant galaxies. Background - During a three-week period in 1997, the Hubble Space Telescope was used to observe a supernova - an exploding star in a distant galaxy. These exploding stars appear sudde ...
Module code: AA1
... representative sample due to the high luminosity value. The group of nearest stars on the contrary can be considered as a random sample without specific properties (other than being close to the earth) and fulfils perfectly the 90% expectation. To get a statistically more significant conclusion the ...
... representative sample due to the high luminosity value. The group of nearest stars on the contrary can be considered as a random sample without specific properties (other than being close to the earth) and fulfils perfectly the 90% expectation. To get a statistically more significant conclusion the ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.