5 Elements of nuclear physics 5.1 Strong interaction and structure of atomic nuclei
... This is the Chandrasekhar mass, the maximal possible mass of the white dwarf. For larger masses, the pressure of degenerate electrons is unable to balance the gravity force therefore the star collapses into the neutron star or black hole. Numerically MCh = 1.4MJ . In neutron stars, the gravity force ...
... This is the Chandrasekhar mass, the maximal possible mass of the white dwarf. For larger masses, the pressure of degenerate electrons is unable to balance the gravity force therefore the star collapses into the neutron star or black hole. Numerically MCh = 1.4MJ . In neutron stars, the gravity force ...
THE BIG BANG THEORY
... HELIUM WAS MADE DURING THE BIG BANG • physicists calculated that roughly 1/4 of mass was converted into helium during the big bang, while the rest remained as hydrogen. • 1970s: spectroscopic studies of other galaxies have confirmed that the majority of the observed helium did exist before any star ...
... HELIUM WAS MADE DURING THE BIG BANG • physicists calculated that roughly 1/4 of mass was converted into helium during the big bang, while the rest remained as hydrogen. • 1970s: spectroscopic studies of other galaxies have confirmed that the majority of the observed helium did exist before any star ...
Topics for this week
... The Sun radiates tremendous amount of energy from its surface. Where does this energy come from? Nuclear fusion inside the Sun generates energy while fusing hydrogen nuclei to make helium nuclei. The reaction chain is referred to as the proton-proton chain because the first reaction is the fusion of ...
... The Sun radiates tremendous amount of energy from its surface. Where does this energy come from? Nuclear fusion inside the Sun generates energy while fusing hydrogen nuclei to make helium nuclei. The reaction chain is referred to as the proton-proton chain because the first reaction is the fusion of ...
The Night Sky September 2016 - Bridgend Astronomical Society
... midnight. The meteors arise from comet 2P/Encke. Its tail is especially rich in large particles and, this year, we may pass through a relatively rich band so it is possible that a number of fireballs might be observed! The better known November shower is the Leonids which peak on the night of the 17 ...
... midnight. The meteors arise from comet 2P/Encke. Its tail is especially rich in large particles and, this year, we may pass through a relatively rich band so it is possible that a number of fireballs might be observed! The better known November shower is the Leonids which peak on the night of the 17 ...
Astronomy 102, Spring 2003 Solutions to Review Problems
... stars visible to the naked eye. (a) How far away (in AU) would an identical solar type star be if it were just barely visible to the naked eye? (b) What would be its distance in light-years? (a) The first point is to note that how bright the star looks is the flux of light reaching the earth, so. If ...
... stars visible to the naked eye. (a) How far away (in AU) would an identical solar type star be if it were just barely visible to the naked eye? (b) What would be its distance in light-years? (a) The first point is to note that how bright the star looks is the flux of light reaching the earth, so. If ...
Constellation Markers - The Roger Sherman Society
... Cos, Pergamum, and later Rome -Rev. 2:12 And to the angel of the church in Pergamos write; These things saith he which hath the ...
... Cos, Pergamum, and later Rome -Rev. 2:12 And to the angel of the church in Pergamos write; These things saith he which hath the ...
INSIDE LAB 7: Measuring the Velocities of Stars
... can affect the wavelength. A star moving towards or away from has, due to the Doppler shift, all of its waves shifted to shorter or longer wavelengths, as illustrated in Fig. 4. Moving Figure 4: The Doppler shift. An object moving objects generate waves of any towards you has its light shifted towar ...
... can affect the wavelength. A star moving towards or away from has, due to the Doppler shift, all of its waves shifted to shorter or longer wavelengths, as illustrated in Fig. 4. Moving Figure 4: The Doppler shift. An object moving objects generate waves of any towards you has its light shifted towar ...
12.425 Lecture 15 Tuesday November 20, 2007
... wavelengths so it would be hard to make a critical reading from the range presented. It is interesting to note that the y-axis is star-planet contrast and in this case the planet is quite bright; it emits 1/1000 of the star’s light. This can be compared to the Earth-sun planet-star contrast of 1/1 m ...
... wavelengths so it would be hard to make a critical reading from the range presented. It is interesting to note that the y-axis is star-planet contrast and in this case the planet is quite bright; it emits 1/1000 of the star’s light. This can be compared to the Earth-sun planet-star contrast of 1/1 m ...
CMBR and BH evaporation
... can be more than this one of CMBR, but here we will consider the last only. As we know, the Universe is fulfilled by CMBR whose spectrum is the thermal one too (Fig. 1) and corresponds to TCMBR ~ 3 K (more precisely: 2.725 K, spectral maximum at λ=1.9 mm, frequency is 160.4 GHz). This is confirmed w ...
... can be more than this one of CMBR, but here we will consider the last only. As we know, the Universe is fulfilled by CMBR whose spectrum is the thermal one too (Fig. 1) and corresponds to TCMBR ~ 3 K (more precisely: 2.725 K, spectral maximum at λ=1.9 mm, frequency is 160.4 GHz). This is confirmed w ...
Stellar Motions
... • 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. ...
... • 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. ...
The Butterfly Nebula (NGC 6302)
... of hydrogen fuel and reach retirement age. This is when these stars begin to stand out. As the fuel is exhausted, they first expand to enormous sizes, becoming what are called “red giants.” Then they shed their outer layers into space, producing the beautiful shapes of planetary nebulae. Finally, t ...
... of hydrogen fuel and reach retirement age. This is when these stars begin to stand out. As the fuel is exhausted, they first expand to enormous sizes, becoming what are called “red giants.” Then they shed their outer layers into space, producing the beautiful shapes of planetary nebulae. Finally, t ...
THE METER STICK MODEL OF THE SOLAR SYSTEM
... Because these are almost the same, we can extend our meter stick model solar system to model distances to the stars. In this model, one light- year is one mile. The nearest star to the sun is 4.2 light-years away. So, in the meter stick model, the nearest star is OVER FOUR MILES AWAY! The following ...
... Because these are almost the same, we can extend our meter stick model solar system to model distances to the stars. In this model, one light- year is one mile. The nearest star to the sun is 4.2 light-years away. So, in the meter stick model, the nearest star is OVER FOUR MILES AWAY! The following ...
The Sun
... • So where the sun’s magnetic field is concentrated it inhibits the normal convective flow of hot material from below. The material gets locked by the magnetic fields to say on the surface, where it cools as it radiates to the sky. • Sunspots are like “magnetic scabs” of gas unable to be recirculate ...
... • So where the sun’s magnetic field is concentrated it inhibits the normal convective flow of hot material from below. The material gets locked by the magnetic fields to say on the surface, where it cools as it radiates to the sky. • Sunspots are like “magnetic scabs” of gas unable to be recirculate ...
Constellations and Asterisms
... sky, and located in the northern hemisphere. More precisely, it is located at 10.67h right ascension, and +55.38 declination, covering about 1280 square degrees of the sky. If you look at the diagram of Ursa Major, you will see that it resembles a four-legged animal. Traditionally, Ursa Major is cal ...
... sky, and located in the northern hemisphere. More precisely, it is located at 10.67h right ascension, and +55.38 declination, covering about 1280 square degrees of the sky. If you look at the diagram of Ursa Major, you will see that it resembles a four-legged animal. Traditionally, Ursa Major is cal ...
Transits
... HD 189733b & HD 209458b, both hot-jupiters, were extensively (and still are being) studied by Spitzer A whole range of hot-jupiters & low-mass planets were discovered after them Only Warm Spitzer (3.6 and 4.5 micron) working now ...
... HD 189733b & HD 209458b, both hot-jupiters, were extensively (and still are being) studied by Spitzer A whole range of hot-jupiters & low-mass planets were discovered after them Only Warm Spitzer (3.6 and 4.5 micron) working now ...
The Ancient Heavens: Exploring the History of Astronomy
... these activities help participants appreciate not only what we know, but how we know it. ...
... these activities help participants appreciate not only what we know, but how we know it. ...
SSG Coordinators will be at the Cronan Ranch observing site at 6
... around the dragon’s tail, however, does have an interesting galaxy that rewards the star-hopper. The brightest star due east of M81-82 is the very tip of the dragons tail. Known as Glausar, Lamda () Draconis is our first way-point. Now draw an imaginary line from Glausar to the next tail star, Kapp ...
... around the dragon’s tail, however, does have an interesting galaxy that rewards the star-hopper. The brightest star due east of M81-82 is the very tip of the dragons tail. Known as Glausar, Lamda () Draconis is our first way-point. Now draw an imaginary line from Glausar to the next tail star, Kapp ...
Back to basics: naked-eye astronomical observation
... harder than other GCSEs, in that for teenagers the background knowledge required often has not been assimilated, and in most schools timetabling will be limited. Hence those capable of following an extra course tend to be a highly motivated and select few. Numbers are low and only significant suppor ...
... harder than other GCSEs, in that for teenagers the background knowledge required often has not been assimilated, and in most schools timetabling will be limited. Hence those capable of following an extra course tend to be a highly motivated and select few. Numbers are low and only significant suppor ...
Exoplanets - Mid-Pacific Institute
... They plan to detect exoplanets as they pass in front of their parent stars ...
... They plan to detect exoplanets as they pass in front of their parent stars ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.