FOURTH GRADE UNIVERSE - Math/Science Nucleus
... Stars are balls of gas that emit energy created by fusion, a nuclear reaction within the star. There are many sizes and brightness of stars, ranging from super hot, blue-white stars (over 20,000°K) to cool red stars (3,000°K). Our Sun is a medium yellow star, towards the small and cool end of the sp ...
... Stars are balls of gas that emit energy created by fusion, a nuclear reaction within the star. There are many sizes and brightness of stars, ranging from super hot, blue-white stars (over 20,000°K) to cool red stars (3,000°K). Our Sun is a medium yellow star, towards the small and cool end of the sp ...
Doppler Effect
... Describe an example of the Doppler Effect that involves sound. Describe the pitch, frequencies, and wavelengths. Describe an example of the Doppler Effect that involves light. Describe the frequencies and wavelengths. Explain why the Doppler Effect occurs. Describe how the Doppler Effect is ...
... Describe an example of the Doppler Effect that involves sound. Describe the pitch, frequencies, and wavelengths. Describe an example of the Doppler Effect that involves light. Describe the frequencies and wavelengths. Explain why the Doppler Effect occurs. Describe how the Doppler Effect is ...
Astrowheel activity for Wednesday Feb 16
... LEO) has an RA of very close to 10, and the star Fomalhaut (at -30o dec) has an RA of about 23. Label these two spokes and then fill in the other RA’s (from 0 to 23) such that they are in numerical order. Hint: The numbers increase in the clockwise direction. 4. If you took care to be very precise, ...
... LEO) has an RA of very close to 10, and the star Fomalhaut (at -30o dec) has an RA of about 23. Label these two spokes and then fill in the other RA’s (from 0 to 23) such that they are in numerical order. Hint: The numbers increase in the clockwise direction. 4. If you took care to be very precise, ...
Sample pages 1 PDF
... wintertime sky also contains some of the most spectacular deep sky objects, of which the Orion Nebula and the Pleiades are the best known. It shouldn’t be overlooked that this is also the time of year when people give each other gifts. Quite a few budding astronomers will be testing out their first ...
... wintertime sky also contains some of the most spectacular deep sky objects, of which the Orion Nebula and the Pleiades are the best known. It shouldn’t be overlooked that this is also the time of year when people give each other gifts. Quite a few budding astronomers will be testing out their first ...
What is a white dwarf?
... degeneracy pressure doesn't depend on temperature • Is there a limit to how much you can shrink a white dwarf? (That is, how much mass a WD can have?) ...
... degeneracy pressure doesn't depend on temperature • Is there a limit to how much you can shrink a white dwarf? (That is, how much mass a WD can have?) ...
PH607lec12
... and Ho is essentially an inverse Hubble time. Can define a Hubble length: c / H0 ~ 4000 Mpc at which this expression for the recession velocity extrapolates to the speed of light - more detailed relativistic treatment is needed for distances of this order. Can also define a Hubble time: 1 / H0 ~ 101 ...
... and Ho is essentially an inverse Hubble time. Can define a Hubble length: c / H0 ~ 4000 Mpc at which this expression for the recession velocity extrapolates to the speed of light - more detailed relativistic treatment is needed for distances of this order. Can also define a Hubble time: 1 / H0 ~ 101 ...
MAIN SEQUENCE STARS, Red Giants and White Dwarfs
... He BURNING MAIN SEQUENCE -- which is visible on an H-R diagram as the HORIZONTAL BRANCH (lower L but higher Ts than during the He flash). o Stars are again in HYDROSTATIC EQUILIBRIUM throughout: the thermostat works again o These are still RGs, and on HB the higher masses are to the left part of the ...
... He BURNING MAIN SEQUENCE -- which is visible on an H-R diagram as the HORIZONTAL BRANCH (lower L but higher Ts than during the He flash). o Stars are again in HYDROSTATIC EQUILIBRIUM throughout: the thermostat works again o These are still RGs, and on HB the higher masses are to the left part of the ...
OBJXlab-JCU_Alt
... What does it mean to say that an astronomer has “discovered” something? In many fields of science, discovery implies finding something that is hidden out of sight, such as digging up a fossil hidden under layers of clay, discovering the chemical structure of an enzyme, or traveling to the heart of t ...
... What does it mean to say that an astronomer has “discovered” something? In many fields of science, discovery implies finding something that is hidden out of sight, such as digging up a fossil hidden under layers of clay, discovering the chemical structure of an enzyme, or traveling to the heart of t ...
Abstract and Summary
... structure of components that are closely spaced in period. These multiplet structures are attributed to the phenomenon of rotational splitting, where formerly degenerate modes show their components due the breaking of spherical symmetry that occurs when rotation is considered. Period spacings betwee ...
... structure of components that are closely spaced in period. These multiplet structures are attributed to the phenomenon of rotational splitting, where formerly degenerate modes show their components due the breaking of spherical symmetry that occurs when rotation is considered. Period spacings betwee ...
File
... The SMC and LMC are small Irregular galaxies that are satellites of the Milky Way Galaxy. ...
... The SMC and LMC are small Irregular galaxies that are satellites of the Milky Way Galaxy. ...
Galaxy Formation and Evolution Open Problems
... Dark Halo: Rotation curves of galactic disks Stars and gas in the galactic disks follow circular orbits whose velocity depends on the inner mass only: v2(r) = G M(
... Dark Halo: Rotation curves of galactic disks Stars and gas in the galactic disks follow circular orbits whose velocity depends on the inner mass only: v2(r) = G M(
Life Cycle of a Star Lesson Plan
... A white dwarf is very hot when it is formed, but since it has no source of energy, it will gradually radiate away its energy and cool down. This means that its radiation, which initially has a high color temperature, will lessen and redden with time. Over a very long time, a white dwarf will cool to ...
... A white dwarf is very hot when it is formed, but since it has no source of energy, it will gradually radiate away its energy and cool down. This means that its radiation, which initially has a high color temperature, will lessen and redden with time. Over a very long time, a white dwarf will cool to ...
Fate of Stars
... Stars with larger sizes are brighter then a smaller star with the same surface temperature ...
... Stars with larger sizes are brighter then a smaller star with the same surface temperature ...
Eclipsing Binary Stars as Astrophysical Laboratories
... hard to tell from this graph, but the diagonal lines represent the radius. So, for example, when we look at Sirius we can read off its luminosity, its temperature, and its radius right from that diagram. It is all right there in a compact two-dimensional form. The Hertzsprung-Russell diagram has bee ...
... hard to tell from this graph, but the diagonal lines represent the radius. So, for example, when we look at Sirius we can read off its luminosity, its temperature, and its radius right from that diagram. It is all right there in a compact two-dimensional form. The Hertzsprung-Russell diagram has bee ...
The Naked Eye Stars as Data Supporting Galileo`s
... circles representing brighter stars). Top left -- numbers of each magnitude in proportions found in Bright Star Catalog (i.e. real sky). Top right -numbers calculated via equation 3. Bottom left, equal numbers of each magnitude. Bottom right -- numbers of each magnitude selected at random. If stars ...
... circles representing brighter stars). Top left -- numbers of each magnitude in proportions found in Bright Star Catalog (i.e. real sky). Top right -numbers calculated via equation 3. Bottom left, equal numbers of each magnitude. Bottom right -- numbers of each magnitude selected at random. If stars ...
The Evolution of Stars - a More Detailed Picture (Chapter 8
... luminosity (Fig. 1). These are called Hayashi-tracks. In time, as the internal temperature continues to rise, ionisation is completed and the opacity drops. The convective zone recedes from the centre, and the star moves to higher effective temperatures. Slowly nuclear burning starts in the core. As ...
... luminosity (Fig. 1). These are called Hayashi-tracks. In time, as the internal temperature continues to rise, ionisation is completed and the opacity drops. The convective zone recedes from the centre, and the star moves to higher effective temperatures. Slowly nuclear burning starts in the core. As ...
Sample Exam for 3 rd Astro Exam
... 15. Where is the galactic gas layer located? A. In the galactic halo. B. In the galactic nuclear bulge C. Beyond the Sun above and below the galactic mid-plane D. Perpendicular to the galactic plane. E. In the galactic mid-plane 16. True or false: The Sun is located within the galactic gas layer of ...
... 15. Where is the galactic gas layer located? A. In the galactic halo. B. In the galactic nuclear bulge C. Beyond the Sun above and below the galactic mid-plane D. Perpendicular to the galactic plane. E. In the galactic mid-plane 16. True or false: The Sun is located within the galactic gas layer of ...
EvoluGon of high mass stars Solar-‐type stars end their lives by
... This energy loss can be compensated for by increasing the rate of fusion reac=ons, un=l an Fe core is formed. The only way in which internal energy can be generated in this core is for grav ...
... This energy loss can be compensated for by increasing the rate of fusion reac=ons, un=l an Fe core is formed. The only way in which internal energy can be generated in this core is for grav ...
New product range (an implementation plan for business expansion)
... with minimal new production and distribution infrastructure being required. There will be some investment in new personnel — two part-time production workers, one new Production Supervisor and one dedicated Product Manager. At eighteen months a review is scheduled which will address any changes or a ...
... with minimal new production and distribution infrastructure being required. There will be some investment in new personnel — two part-time production workers, one new Production Supervisor and one dedicated Product Manager. At eighteen months a review is scheduled which will address any changes or a ...
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.