Take Something Like a Star
... We grant your loftiness the right To some obscurity of cloud— It will not do to say of night, Since dark is what brings out your light. Some mystery becomes the proud. But to be wholly taciturn In your reserve is not allowed. Say something to us we can learn By heart and when alone repeat. Say somet ...
... We grant your loftiness the right To some obscurity of cloud— It will not do to say of night, Since dark is what brings out your light. Some mystery becomes the proud. But to be wholly taciturn In your reserve is not allowed. Say something to us we can learn By heart and when alone repeat. Say somet ...
Phys 214. Planets and Life
... compensates by shrinking and heating up. The outer layer surrounding the core (that still contains unburned H) becomes very hot that ignites nuclear fusion. The total rate of fusion is so high that the star increases in size and emits more light. The Sun will expand into a red giant when will run ou ...
... compensates by shrinking and heating up. The outer layer surrounding the core (that still contains unburned H) becomes very hot that ignites nuclear fusion. The total rate of fusion is so high that the star increases in size and emits more light. The Sun will expand into a red giant when will run ou ...
ppt
... This is helpful because it allows us to write down a relationship as a function of solar values, without going into details of how we do this, the final result is Tp 278 ...
... This is helpful because it allows us to write down a relationship as a function of solar values, without going into details of how we do this, the final result is Tp 278 ...
Precession of Earth
... Over the course of time, the North Star changes. Right now Polaris is within one degree of true north, but at other times the North Star has been and will again be Thuban (the brightest star in the constellation Draco), Vega (the brightest star in the constellation Lyra), and Alpha Cephei (the brigh ...
... Over the course of time, the North Star changes. Right now Polaris is within one degree of true north, but at other times the North Star has been and will again be Thuban (the brightest star in the constellation Draco), Vega (the brightest star in the constellation Lyra), and Alpha Cephei (the brigh ...
lecture21
... neutron star is immense due to its tiny size and large mass. For neutron stars with mass below about 3 solar masses, the degenerate neutron pressure is enough to withstand gravity and an equilibrium results. What happens if the neutron star is above 3 solar masses? In this case, the gravitational fo ...
... neutron star is immense due to its tiny size and large mass. For neutron stars with mass below about 3 solar masses, the degenerate neutron pressure is enough to withstand gravity and an equilibrium results. What happens if the neutron star is above 3 solar masses? In this case, the gravitational fo ...
PHYS-633: Problem set #0 Solutions
... c. Which result seems more “reasonable”? Briefly discuss what other physics might be important to include to understand the actual surface temperature of Earth. This apparently more realistic model thus seems to give a temperature that is much lower than the typical temperature of the actual Earth. ...
... c. Which result seems more “reasonable”? Briefly discuss what other physics might be important to include to understand the actual surface temperature of Earth. This apparently more realistic model thus seems to give a temperature that is much lower than the typical temperature of the actual Earth. ...
Nov13Guide - East-View
... catches the eye, but the square is joined to the east by the ancient constellation of Andromeda. Andromeda was the mythological daughter of Queen Cassiopeia and King Cepheus who was rescued from Cetus, the sea monster, by Perseus riding on the back of the flying horse, Pegasus. The brightest star of ...
... catches the eye, but the square is joined to the east by the ancient constellation of Andromeda. Andromeda was the mythological daughter of Queen Cassiopeia and King Cepheus who was rescued from Cetus, the sea monster, by Perseus riding on the back of the flying horse, Pegasus. The brightest star of ...
ASTR3007/4007/6007: Part I: Stars Semester 1, 2017 Problem set 1
... 20◦ C. At what wavelength does the emission peak, and in what part of the electromagnetic spectrum does this lie? (d) [5 points] Given you answer to part (c), why is the basketball orange? 2. Measuring Stellar Masses Using Spectroscopic Binaries. [20 points] For spectroscopic binaries, we can direct ...
... 20◦ C. At what wavelength does the emission peak, and in what part of the electromagnetic spectrum does this lie? (d) [5 points] Given you answer to part (c), why is the basketball orange? 2. Measuring Stellar Masses Using Spectroscopic Binaries. [20 points] For spectroscopic binaries, we can direct ...
Lecture 18
... d) Perhaps massive stars don’t form from one collapsing cloud, but instead form from collisions of smaller stars? Idea: stars today never collide, but collisions would be more frequent: • In young clusters where stars form, which are much denser than the Galaxy in the Solar neighborhood. • Young st ...
... d) Perhaps massive stars don’t form from one collapsing cloud, but instead form from collisions of smaller stars? Idea: stars today never collide, but collisions would be more frequent: • In young clusters where stars form, which are much denser than the Galaxy in the Solar neighborhood. • Young st ...
Cosmological Aspects of Nucleosynthesis
... What is a Pair Instability Supernova (PCSNe)? PCSNe: final state evolution of a very massive stars which develops a very massive carbonoxygen cores largely supported by radiation pressure ...
... What is a Pair Instability Supernova (PCSNe)? PCSNe: final state evolution of a very massive stars which develops a very massive carbonoxygen cores largely supported by radiation pressure ...
Comets, Meteors, and Meteoroids
... On November 19, 2002, we passed through a famous comet dust stream. When we flew through this space dust, the meteors seemed to shoot out of a group of stars called “Leo the Lion.” This meteor shower is called the Leonids. In 1833, the Leonids caused a meteor storm. More than 1,000 meteors fell from ...
... On November 19, 2002, we passed through a famous comet dust stream. When we flew through this space dust, the meteors seemed to shoot out of a group of stars called “Leo the Lion.” This meteor shower is called the Leonids. In 1833, the Leonids caused a meteor storm. More than 1,000 meteors fell from ...
1:45 PM TuTh This is a one-quarter course on
... Ay 12 is especially intended for science majors and counts toward satisfying requirements for the astrophysics minor. It is heavily physics oriented. However, it should also be accessible to highly motivated non-science majors with some background in math and exposure to physical principles (see bel ...
... Ay 12 is especially intended for science majors and counts toward satisfying requirements for the astrophysics minor. It is heavily physics oriented. However, it should also be accessible to highly motivated non-science majors with some background in math and exposure to physical principles (see bel ...
Are there Earth-like planets around other stars?
... mass of Earth, its gravity dragged in the surrounding gas. In this way, the clump transformed itself into a gigantic planet with a solid core surrounded by huge amounts of compressed gas – we call it a gas planet, even though it also has a solid core of ice with small amounts of stone and metal insi ...
... mass of Earth, its gravity dragged in the surrounding gas. In this way, the clump transformed itself into a gigantic planet with a solid core surrounded by huge amounts of compressed gas – we call it a gas planet, even though it also has a solid core of ice with small amounts of stone and metal insi ...
plasmas and fusion reactions
... When geologists realized that fossil fuels such as coal and oil are the remains of living matter that existed millions of years ago, the conclusion is that their origin is from the sun, which has been shining steadily for a long time. It is obvious that chemical energy and gravitational potential en ...
... When geologists realized that fossil fuels such as coal and oil are the remains of living matter that existed millions of years ago, the conclusion is that their origin is from the sun, which has been shining steadily for a long time. It is obvious that chemical energy and gravitational potential en ...
THE STARS G. Iafrate(a), M. Ramella(a) and V. Bologna(b) (a) INAF
... main sequence. In the diagram there are also stars that do not belong any more to the main sequence and are approaching the end of their life. For example giant and supergiant stars lie on the upper right section of the diagram because they have large luminosity but low temperature. The white dwarfs ...
... main sequence. In the diagram there are also stars that do not belong any more to the main sequence and are approaching the end of their life. For example giant and supergiant stars lie on the upper right section of the diagram because they have large luminosity but low temperature. The white dwarfs ...
CONSTELLATION CASSIOPEIA named after the
... • Gamma Cassiopeiae is a shell star, a type of variable star that has a very high rate of rotation. This causes the star to be somewhat unstable and periodically eject rings of material. Gamma Cassiopeiae has a minimum magnitude of 3.0 and a maximum magnitude of 1.6; it is currently approximately ma ...
... • Gamma Cassiopeiae is a shell star, a type of variable star that has a very high rate of rotation. This causes the star to be somewhat unstable and periodically eject rings of material. Gamma Cassiopeiae has a minimum magnitude of 3.0 and a maximum magnitude of 1.6; it is currently approximately ma ...
9. Fascinating observations. But how much is well understood?
... nearly 1,4 M sol , so the notation high and low mass refers to the normal (optical observable) primary star. In HMXB systems the normal star is often of spectral type B, a hot very luminous star with several times the solar radius. The orbital period is a few weeks till months. The B-star has an eff ...
... nearly 1,4 M sol , so the notation high and low mass refers to the normal (optical observable) primary star. In HMXB systems the normal star is often of spectral type B, a hot very luminous star with several times the solar radius. The orbital period is a few weeks till months. The B-star has an eff ...
Slide 1
... • P. 8.6 Compute your Schwarz radius and density for BH of your mass. – If an object shrinks to the Schwarzschild Radius it will ultimately collapse to a singularity (basically vanish from our universe). A singularity is like what happens to 1/x when x0. Eq. 8.8 is: RS =2GM/c^2 (Example 8.2 did RS w ...
... • P. 8.6 Compute your Schwarz radius and density for BH of your mass. – If an object shrinks to the Schwarzschild Radius it will ultimately collapse to a singularity (basically vanish from our universe). A singularity is like what happens to 1/x when x0. Eq. 8.8 is: RS =2GM/c^2 (Example 8.2 did RS w ...
Slide 1
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.