Light-years
... Earth and sun b. The tilted orbit of the moon c. The moons period of revolution just equals its period of rotation d. Sunlight reflecting off Earth’s surface ...
... Earth and sun b. The tilted orbit of the moon c. The moons period of revolution just equals its period of rotation d. Sunlight reflecting off Earth’s surface ...
Electromagnetic Spectrum
... • Stars take the color of their peak wavelength. For example the Sun’s peak wavelength is in the yellow region of the visible spectrum, therefore the sun appears to be yellow. • Hotter objects peak on the blue side and cooler objects toward the red • Some objects in the sky are even hotter, and they ...
... • Stars take the color of their peak wavelength. For example the Sun’s peak wavelength is in the yellow region of the visible spectrum, therefore the sun appears to be yellow. • Hotter objects peak on the blue side and cooler objects toward the red • Some objects in the sky are even hotter, and they ...
Distances of the Stars
... The smallest parallax measurable from the ground is about 0.01-arcsec • Measure distances out to ~100 pc • Get 10% distances only to a few parsecs. • But, only a few hundred stars this close ...
... The smallest parallax measurable from the ground is about 0.01-arcsec • Measure distances out to ~100 pc • Get 10% distances only to a few parsecs. • But, only a few hundred stars this close ...
V Example: our SUN (G2V)
... A supernova occurs when the core of the massive star collapses and a shock wave rips the star apart, usually leaving behind a neutron star. Supernovae can also be produced when enough material is deposited on a white dwarf so that is exceeds the Chandrasekhar limit and collapses to a neutron star. B ...
... A supernova occurs when the core of the massive star collapses and a shock wave rips the star apart, usually leaving behind a neutron star. Supernovae can also be produced when enough material is deposited on a white dwarf so that is exceeds the Chandrasekhar limit and collapses to a neutron star. B ...
Problems_blackbody_spectra_hr
... Above are three spectral curves showing stars A, X, Y, Z. Star A is shown in all of the plots as a point of comparison. Assume that stars A and Y are the same size. 7. Between stars A and Y, which star looks redder? Explain your reasoning. ...
... Above are three spectral curves showing stars A, X, Y, Z. Star A is shown in all of the plots as a point of comparison. Assume that stars A and Y are the same size. 7. Between stars A and Y, which star looks redder? Explain your reasoning. ...
Astronomy - Scioly.org
... 23. All stars are composed of mostly hydrogen and helium, yet many stars have no lines for hydrogen or helium in their spectrum. What causes this apparent contradiction? a. Spectral lines are created in the lower atmospheres of stars, and for many stars hydrogen and helium are hidden below the atmo ...
... 23. All stars are composed of mostly hydrogen and helium, yet many stars have no lines for hydrogen or helium in their spectrum. What causes this apparent contradiction? a. Spectral lines are created in the lower atmospheres of stars, and for many stars hydrogen and helium are hidden below the atmo ...
3Nov_2014
... We observe stars at various stages of evolution, and can piece together a description of the evolution of stars in general Computer models provide a “fast-forward” look at the evolution of stars. ...
... We observe stars at various stages of evolution, and can piece together a description of the evolution of stars in general Computer models provide a “fast-forward” look at the evolution of stars. ...
Neutron Stars and Black Holes
... from you. If the 100 W bulb is closer, which one appears brighter? A. The 50 W bulb B. The 100 W bulb C. They appear the same brightness D. There is not enough information to tell ...
... from you. If the 100 W bulb is closer, which one appears brighter? A. The 50 W bulb B. The 100 W bulb C. They appear the same brightness D. There is not enough information to tell ...
What is a standard candle?
... from you. If the 100 W bulb is closer, which one appears brighter? A. The 50 W bulb B. The 100 W bulb C. They appear the same brightness D. There is not enough information to tell ...
... from you. If the 100 W bulb is closer, which one appears brighter? A. The 50 W bulb B. The 100 W bulb C. They appear the same brightness D. There is not enough information to tell ...
notes
... light from another. Astronomers are have found other stars with planets around them. They are able to tell that these stars have planets because of how the planet effects the star. Only large planets have been detected so far (half the mass of Jupiter). A small planet would be difficult to detect be ...
... light from another. Astronomers are have found other stars with planets around them. They are able to tell that these stars have planets because of how the planet effects the star. Only large planets have been detected so far (half the mass of Jupiter). A small planet would be difficult to detect be ...
Review
... D) The orbits of Pluto and the other distant dwarf planets are tilted in different directions. 30) Planets orbiting other stars are hard to detect because they A) only reflect light, are very small B) are far away, are very small C) are far away, only reflect light D) all three 31) Planets orbiting ...
... D) The orbits of Pluto and the other distant dwarf planets are tilted in different directions. 30) Planets orbiting other stars are hard to detect because they A) only reflect light, are very small B) are far away, are very small C) are far away, only reflect light D) all three 31) Planets orbiting ...
Lecture 11
... Where Do Stars Form? • Stars don’t form uniformly in the galaxy • Stars like to form in the spiral arms of galaxies – We say that the arms appear “blue” while other parts appear “red” ...
... Where Do Stars Form? • Stars don’t form uniformly in the galaxy • Stars like to form in the spiral arms of galaxies – We say that the arms appear “blue” while other parts appear “red” ...
section 17 powerpoint
... by 1 Astronomical Unit, A.U., at the distance of a star. In practice one can observe the annual displacement of a star resulting from Earth’s orbit about the Sun as 2π. Since all stars should exhibit parallax, measured values (trigonometric parallaxes) are of two types: πrel = relative parallax, is ...
... by 1 Astronomical Unit, A.U., at the distance of a star. In practice one can observe the annual displacement of a star resulting from Earth’s orbit about the Sun as 2π. Since all stars should exhibit parallax, measured values (trigonometric parallaxes) are of two types: πrel = relative parallax, is ...
Things to know: This meant as a guide to what you should know. I
... What are the basic steps of stellar evolution for low and high mass stars after the stars run out of Hydrogen in their cores and leave the main sequence. Approximately how long does each phase last, how does the luminosity change with time? Where are the red giants on the HR diagram? Super giants? W ...
... What are the basic steps of stellar evolution for low and high mass stars after the stars run out of Hydrogen in their cores and leave the main sequence. Approximately how long does each phase last, how does the luminosity change with time? Where are the red giants on the HR diagram? Super giants? W ...
Comet Lulin - indstate.edu
... Since Comet Lulin will be moving opposite the motion of the Earth, it will appear to approach us and move away especially fast. Beginning in February 2009, Comet Lulin will rise at about midnight local time, and will be about 6th or 7th magnitude. This won't be bright enough to go out and look at ...
... Since Comet Lulin will be moving opposite the motion of the Earth, it will appear to approach us and move away especially fast. Beginning in February 2009, Comet Lulin will rise at about midnight local time, and will be about 6th or 7th magnitude. This won't be bright enough to go out and look at ...
Rogava_Course_-_First_lecture
... • Detached binaries are a kind of binary stars where each component is within its Roche lobe. No major impact on each other, stars essentially evolve separately. • Semidetached binary stars: one of the components fills its Roche lobe and the other does not. Gas from the surface of the Roche lobe fil ...
... • Detached binaries are a kind of binary stars where each component is within its Roche lobe. No major impact on each other, stars essentially evolve separately. • Semidetached binary stars: one of the components fills its Roche lobe and the other does not. Gas from the surface of the Roche lobe fil ...
Brightness and Distance
... steradian (a unit of solid angle). It is important to note that luminous intensity takes into account the response of the human visual system. In other words, our eyes are not equally sensitive to all wavelengths of visible light. Since the response of the human eye to brightness is close to logarit ...
... steradian (a unit of solid angle). It is important to note that luminous intensity takes into account the response of the human visual system. In other words, our eyes are not equally sensitive to all wavelengths of visible light. Since the response of the human eye to brightness is close to logarit ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.