Stellar Evolution
... Stellar Evolution • In the case of the Sun (or any 1Mo star) the gradual increase in radius and luminosity will continue for another 5 billion years. • While hydrogen fusion is the dominant energy source, there is a useful thermostat operating. If the Sun contracted and heated up, the fusion rates ...
... Stellar Evolution • In the case of the Sun (or any 1Mo star) the gradual increase in radius and luminosity will continue for another 5 billion years. • While hydrogen fusion is the dominant energy source, there is a useful thermostat operating. If the Sun contracted and heated up, the fusion rates ...
Stellar Motions
... Importance of Doppler Effect • The Doppler effect is very important because it gives us our only way of measuring the motions of distant objects. • As we shall see later, the Doppler effect allowed Edwin Hubble to deduce the universe was expanding. ...
... Importance of Doppler Effect • The Doppler effect is very important because it gives us our only way of measuring the motions of distant objects. • As we shall see later, the Doppler effect allowed Edwin Hubble to deduce the universe was expanding. ...
Regents Earth Science – Unit 5: Astronomy
... dark lines where wavelengths have been absorbed lines have the same fingerprint as in a bright line spectra produced by light that produces a continuous spectrum passing through a cooler gas ...
... dark lines where wavelengths have been absorbed lines have the same fingerprint as in a bright line spectra produced by light that produces a continuous spectrum passing through a cooler gas ...
PH109 Exploring the Universe
... d) Jupiter was not perfect but had moving clouds of gas. 2) When Galileo viewed the Moon, what discovery helped change our view of the solar system? a) Because the Moon rises in the East and sets in the West, its orbit must be opposite that of the planets. b) The Moon went through phases like Jupite ...
... d) Jupiter was not perfect but had moving clouds of gas. 2) When Galileo viewed the Moon, what discovery helped change our view of the solar system? a) Because the Moon rises in the East and sets in the West, its orbit must be opposite that of the planets. b) The Moon went through phases like Jupite ...
JEOPARDY: Astronomy - Mr. Morrow`s Class
... 200 Q: Why do stars appear to move across the night sky? A: Stars do not move, but because Earth is rotating it looks like they move across the night sky from east to west. 300 Q: What is a constellation? A: a group of stars that form a pattern and are often named after animals, objects, or people. ...
... 200 Q: Why do stars appear to move across the night sky? A: Stars do not move, but because Earth is rotating it looks like they move across the night sky from east to west. 300 Q: What is a constellation? A: a group of stars that form a pattern and are often named after animals, objects, or people. ...
Summation Packet KEY
... 20. The star Gamma Per is about 225 light years (LY = distance light travels in one year) from earth. Imagine there is intelligent alien life living on a planet that circles this star. Using what you know about the speed of light and American history, describe what the aliens would be seeing right ...
... 20. The star Gamma Per is about 225 light years (LY = distance light travels in one year) from earth. Imagine there is intelligent alien life living on a planet that circles this star. Using what you know about the speed of light and American history, describe what the aliens would be seeing right ...
Distances in Space
... Andromeda have exploded as a supernova or gone out long ago. The message of these star finishing events just has not gotten to us yet! ...
... Andromeda have exploded as a supernova or gone out long ago. The message of these star finishing events just has not gotten to us yet! ...
hwk01ans
... 4. Look up information about Proxima Centauri, a.k.a. alpha Centauri C, the most famous red dwarf star. Find out its absolute visual magnitude M and its approximate distance from the brighter central star, alpha Centauri A. Estimate Proxima Centauri’s apparent magnitude as seen from alpha Cen A, and ...
... 4. Look up information about Proxima Centauri, a.k.a. alpha Centauri C, the most famous red dwarf star. Find out its absolute visual magnitude M and its approximate distance from the brighter central star, alpha Centauri A. Estimate Proxima Centauri’s apparent magnitude as seen from alpha Cen A, and ...
Sirius Astronomer - Orange County Astronomers
... star’s brightness caused by waves moving through the star. Kepler-37 (the star) is the coolest and smallest star that has been studied with asteroseismology. It is ¾ the diameter of our Sun. The asteroseismic study yielded a precise diameter for the star, which in turn allows precise calculation of ...
... star’s brightness caused by waves moving through the star. Kepler-37 (the star) is the coolest and smallest star that has been studied with asteroseismology. It is ¾ the diameter of our Sun. The asteroseismic study yielded a precise diameter for the star, which in turn allows precise calculation of ...
The dying sun/ creation of elements
... New physics: At sufficiently high density, quantum mechanical pressure comes in. It is independent of temperature. Will discuss this next class. No more fusion means sun becomes inert. White dwarf. ...
... New physics: At sufficiently high density, quantum mechanical pressure comes in. It is independent of temperature. Will discuss this next class. No more fusion means sun becomes inert. White dwarf. ...
Astronomy
... constellation is hidden in the daylight sky. As the night hours pass and the Earth turns on its axis, the stars turn in circles around Polaris, which appears to stand still. Some constellations are close enough to Polaris that they never set below the horizon. These are the circumpolar stars. Most s ...
... constellation is hidden in the daylight sky. As the night hours pass and the Earth turns on its axis, the stars turn in circles around Polaris, which appears to stand still. Some constellations are close enough to Polaris that they never set below the horizon. These are the circumpolar stars. Most s ...
The life and times of stars
... The surface of the Sun gives out a continuous spectrum – it is an incandescent body The Sun’s atmosphere will produce an absorption spectrum as it is a gas that the Sun’s light is shining through Most nebula will produce emission spectra when suitably energised, they are essentially gas clouds ...
... The surface of the Sun gives out a continuous spectrum – it is an incandescent body The Sun’s atmosphere will produce an absorption spectrum as it is a gas that the Sun’s light is shining through Most nebula will produce emission spectra when suitably energised, they are essentially gas clouds ...
HW9_Answers
... cool to a certain temperature. There are no white dwarf stars cooler than about spectral type K. This is because there hasn’t been enough time for them to cool any further since the start of the universe. Knowing the cooling rate, and the cutoff in temperature for the white dwarfs, gives an age for ...
... cool to a certain temperature. There are no white dwarf stars cooler than about spectral type K. This is because there hasn’t been enough time for them to cool any further since the start of the universe. Knowing the cooling rate, and the cutoff in temperature for the white dwarfs, gives an age for ...
The Sun and other Stars
... Stars begin as interstellar clouds – A mix of gas. When stars like the Sun begin to fuse H to He they fall into the Main sequence stars. The Sun will remain a main sequence star until uses about 90% of its fuel in the core. This is the beginning of the End ...
... Stars begin as interstellar clouds – A mix of gas. When stars like the Sun begin to fuse H to He they fall into the Main sequence stars. The Sun will remain a main sequence star until uses about 90% of its fuel in the core. This is the beginning of the End ...
Lecture 12
... than the resolution of the telescope. 1838: Bessel measured p = 0.316’’ for star 61 Cygni (modern value p = 0.29’’) current ground-based: best errors of ~0.001 arcsec Hipparcos satellite: measured ~105 bright stars with errors also of ~0.001 arcsec GAIA satellite: will measure positions of ~109 star ...
... than the resolution of the telescope. 1838: Bessel measured p = 0.316’’ for star 61 Cygni (modern value p = 0.29’’) current ground-based: best errors of ~0.001 arcsec Hipparcos satellite: measured ~105 bright stars with errors also of ~0.001 arcsec GAIA satellite: will measure positions of ~109 star ...
Day 15
... these “double stars” are actually binary star systems so both stars are at the same distance. ...
... these “double stars” are actually binary star systems so both stars are at the same distance. ...
A search for planets around intermediate Mass Stars with the Hobby
... of the MS. K3-giant HD 240210 is very likely a multiplanet system, though more data will be required to obtain a clear orbital solution. The provisional parameters for one planet that can be fitted for give a 6.9 MJ body in a 501-day, 1.33 AU, e = 0.14 orbit that will have to be revised, when anothe ...
... of the MS. K3-giant HD 240210 is very likely a multiplanet system, though more data will be required to obtain a clear orbital solution. The provisional parameters for one planet that can be fitted for give a 6.9 MJ body in a 501-day, 1.33 AU, e = 0.14 orbit that will have to be revised, when anothe ...
10.1 PPT
... • Early astronomers were able to observe outer space by using the best instruments of the time, early telescopes. • With the development of more powerful telescopes in the 1920’s, suddenly more celestial bodies were discovered. • Celestial bodies is a general term for all the objects in the sky, in ...
... • Early astronomers were able to observe outer space by using the best instruments of the time, early telescopes. • With the development of more powerful telescopes in the 1920’s, suddenly more celestial bodies were discovered. • Celestial bodies is a general term for all the objects in the sky, in ...
this PDF file - University of Leicester Open Journals
... in an eternal and unchanging universe to one where even the stars themselves will one day fade away. Unlike most of the stars we can see with the naked eye, white dwarfs no longer generate heat via nuclear fusion. These stars still give off light as the cooling process takes billions of years. It is ...
... in an eternal and unchanging universe to one where even the stars themselves will one day fade away. Unlike most of the stars we can see with the naked eye, white dwarfs no longer generate heat via nuclear fusion. These stars still give off light as the cooling process takes billions of years. It is ...
Luminosity
... The stars are not randomly distributed on the diagram. There are 3 features that emerge from the H-R diagram: Most stars fall on a strip extending diagonally across the diagram from top left to bottom right. This is called the MAIN SEQUENCE. ...
... The stars are not randomly distributed on the diagram. There are 3 features that emerge from the H-R diagram: Most stars fall on a strip extending diagonally across the diagram from top left to bottom right. This is called the MAIN SEQUENCE. ...
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.