Motions of the Celestial Sphere
... eastward to the foot of that hour circle is the star's right ascension. • There is one oddity in right ascension: the unit used to report the angle. Right ascensions are always recorded in terms of hours, minutes, and seconds. One hour of right ascension (1h) is 15°. Since 24x15°=360°, there are 24h ...
... eastward to the foot of that hour circle is the star's right ascension. • There is one oddity in right ascension: the unit used to report the angle. Right ascensions are always recorded in terms of hours, minutes, and seconds. One hour of right ascension (1h) is 15°. Since 24x15°=360°, there are 24h ...
STARS
... generate their own energy by nuclear reactions in their super hot cores. This newly released energy flows from the stars’ hot interiors to the cooler surface layers, where the energy is radiated into space. We see that radiation and say the stars shine. ...
... generate their own energy by nuclear reactions in their super hot cores. This newly released energy flows from the stars’ hot interiors to the cooler surface layers, where the energy is radiated into space. We see that radiation and say the stars shine. ...
Document
... • High Mass stars often times explode! • This spreads all of the elements Hydrogen through Iron (which makes up our planets and other new stars) and forms all elements after Iron (up to element 92- Uranium). ...
... • High Mass stars often times explode! • This spreads all of the elements Hydrogen through Iron (which makes up our planets and other new stars) and forms all elements after Iron (up to element 92- Uranium). ...
3Nov_2014
... • More distant streetlights appear dimmer than ones closer to us. • It works the same with stars! • If we know the total energy output of a star (luminosity), and we can count the number of photons we receive from that star (brightness), we can calculate its distance L d= 4pB ...
... • More distant streetlights appear dimmer than ones closer to us. • It works the same with stars! • If we know the total energy output of a star (luminosity), and we can count the number of photons we receive from that star (brightness), we can calculate its distance L d= 4pB ...
The Milky Way * A Classic Galaxy
... bright open cluster M23 has a Cepheid. As of 1999, 29 more clusters now known to have Cepheids. • Cepheid PL relation has much less noise if brightnesses measured in the Infrared, which is what is always done these days. • By “Cepheids” I mean “Classical Cepheids”. There are also “Type II Cepheids” ...
... bright open cluster M23 has a Cepheid. As of 1999, 29 more clusters now known to have Cepheids. • Cepheid PL relation has much less noise if brightnesses measured in the Infrared, which is what is always done these days. • By “Cepheids” I mean “Classical Cepheids”. There are also “Type II Cepheids” ...
Life and Death of Stars - UM Research Repository
... The Main Sequence: The second stage of stars life cycles is the main sequence. All stars are in the main sequence after totally achieved the hydrostatic equilibrium. It is the inward force which tends to compress the star, balanced by the outward force due to the pressure. All main sequence stars ar ...
... The Main Sequence: The second stage of stars life cycles is the main sequence. All stars are in the main sequence after totally achieved the hydrostatic equilibrium. It is the inward force which tends to compress the star, balanced by the outward force due to the pressure. All main sequence stars ar ...
Stellar Birth - Chabot College
... Same relative age comparing masses and types of stars is fair ...
... Same relative age comparing masses and types of stars is fair ...
RR animation
... with a mass of around half the Sun's. They are thought to have previously shed mass and consequently, they were once stars with similar or slightly less mass than the Sun, around 0.8 solar masses. RR Lyrae stars pulse in a manner similar to Cepheid variables, so the mechanism for the pulsation is th ...
... with a mass of around half the Sun's. They are thought to have previously shed mass and consequently, they were once stars with similar or slightly less mass than the Sun, around 0.8 solar masses. RR Lyrae stars pulse in a manner similar to Cepheid variables, so the mechanism for the pulsation is th ...
Star Cycle2013
... massive star’s life. When it occurs, the exploding star can outshine all of the other stars in the galaxy in total for several days and may leave behind only a crushed core. ...
... massive star’s life. When it occurs, the exploding star can outshine all of the other stars in the galaxy in total for several days and may leave behind only a crushed core. ...
June - Fort Worth Astronomical Society
... The Constellation Hunter Program has two certifications and pins: The Northern Skies and the Southern Skies. The purpose of these programs is to provide an orientation to the sky for novice astronomers. They require no special equipment (other than a planisphere and a reference for the brighter star ...
... The Constellation Hunter Program has two certifications and pins: The Northern Skies and the Southern Skies. The purpose of these programs is to provide an orientation to the sky for novice astronomers. They require no special equipment (other than a planisphere and a reference for the brighter star ...
Telescopes (continued). Properties of Stars.
... span ~30 light-years (10 pc). Pleiades Globular clusters can contain more than a million stars and span 60-150 light-years. ...
... span ~30 light-years (10 pc). Pleiades Globular clusters can contain more than a million stars and span 60-150 light-years. ...
... Comet ISON dies in Sun’s fiery embrace. The comet raises hopes, dashes them, raises them again and then wafts off into history as a “coulda been”. Proving once again- if such proof is needed- that comets are the contrariest of creatures, Comet ISON made its dash into the glare of the Sun- seemed to h ...
Solutions to the 1 st Astronomy Exam
... Points looking South Stars appear to circle clockwise around the SCP once every 23h 56m 4.09s The SCP has an altitude equal to the observer’s latitude below (or above if the latitude is in the southern hemisphere). For observers at southern latitudes the circumpolar region where stars never se ...
... Points looking South Stars appear to circle clockwise around the SCP once every 23h 56m 4.09s The SCP has an altitude equal to the observer’s latitude below (or above if the latitude is in the southern hemisphere). For observers at southern latitudes the circumpolar region where stars never se ...
Galaxy Notes Presentation
... from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 billion ...
... from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 billion ...
February 2010 Vol 21 No 2 - Cape Cod Astronomical Society
... for Neptune and Jupiter until mid-2010. Look in the West early in the evening. • Magnitude 6 Uranus is still a good target in February but it will soon get very low in the west except in very early evening. Try in good binoculars early in the month. It is easy to find about 9º below and left of mag ...
... for Neptune and Jupiter until mid-2010. Look in the West early in the evening. • Magnitude 6 Uranus is still a good target in February but it will soon get very low in the west except in very early evening. Try in good binoculars early in the month. It is easy to find about 9º below and left of mag ...
Lecture 17 Review
... Interstellar extinction - When enough gas and dust is in the way, far away objects cannot be seen because light is scattered out of the line of sight. Thus, we cannot see the galactic center with visible light. That these clouds are the source of stars follows from several observations: ...
... Interstellar extinction - When enough gas and dust is in the way, far away objects cannot be seen because light is scattered out of the line of sight. Thus, we cannot see the galactic center with visible light. That these clouds are the source of stars follows from several observations: ...
Magnitude of Stars - What`s Out Tonight?
... Although this movement may seem like it would be unnoticable, it was known by the ancient Egyptians because they took accurate measurements of where stars rose and set over hundreds and thousands of years. The effect of precession is that the Earth’s north pole points to different directions in the ...
... Although this movement may seem like it would be unnoticable, it was known by the ancient Egyptians because they took accurate measurements of where stars rose and set over hundreds and thousands of years. The effect of precession is that the Earth’s north pole points to different directions in the ...
Cycles, Virgo
... teaching the emergence of the spiritual man from the control of matter. Three of these goddesses are Eve, Isis, and Mary. They are of peculiar and significant importance where our civilisation is concerned for they embody in themselves the symbology of the entire form nature, which, when integrated ...
... teaching the emergence of the spiritual man from the control of matter. Three of these goddesses are Eve, Isis, and Mary. They are of peculiar and significant importance where our civilisation is concerned for they embody in themselves the symbology of the entire form nature, which, when integrated ...
Lecture 10: The Hertzsprung
... Mass and the Main Sequence We know the masses for a few of the stars on the H-R diagram. When we plot the masses of the stars, we see that the main sequence is actually a mass sequence. More massive stars on the main sequence are hotter, low mass stars are cooler. Why? This is one of the things our ...
... Mass and the Main Sequence We know the masses for a few of the stars on the H-R diagram. When we plot the masses of the stars, we see that the main sequence is actually a mass sequence. More massive stars on the main sequence are hotter, low mass stars are cooler. Why? This is one of the things our ...
Stars
... • Masses similar to our Sun • Evolve into Giants • consume hydrogen and helium at fast rate • Collapse into White Dwarfs • During collapse from Red Giant into White Dwarf they cast off their outer shell and leave a cloud of gas called planetary nebulae ...
... • Masses similar to our Sun • Evolve into Giants • consume hydrogen and helium at fast rate • Collapse into White Dwarfs • During collapse from Red Giant into White Dwarf they cast off their outer shell and leave a cloud of gas called planetary nebulae ...
Sample
... never really reverse their direction of travel in their orbits. This makes it easy to use analogies—for example, when students try the demonstration in Figure 2.27, they never say that their friend really moves backward as they pass by, only that the friend appears to move backward against the backg ...
... never really reverse their direction of travel in their orbits. This makes it easy to use analogies—for example, when students try the demonstration in Figure 2.27, they never say that their friend really moves backward as they pass by, only that the friend appears to move backward against the backg ...
IB_Op_F_04 - Effectsmeister
... radially approaching the earth the light spectrum will be blueshifted (all wavelengths become smaller) and if a star is moving radially away from the earth, the light spectrum will be redshifted (all wavelengths become larger). Use the four positions in the figure under part 2 to predict which star( ...
... radially approaching the earth the light spectrum will be blueshifted (all wavelengths become smaller) and if a star is moving radially away from the earth, the light spectrum will be redshifted (all wavelengths become larger). Use the four positions in the figure under part 2 to predict which star( ...
Constellation
In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU). These areas had their origins in Western-traditional asterisms from which the constellations take their names. There are 88 officially recognized constellations, covering the entire sky.Thus, any given point in a celestial coordinate system can unambiguously be assigned to a constellation. It is usual in astronomy to give the constellation in which a given object is found along with its coordinates in order to convey a rough idea in which part of the sky it is located. For example, saying the Horsehead Nebula is near Orion's Belt in the constellation Orion immediately locates it just south of the ecliptic and conveys that it is best observable in winter from the Northern Hemisphere.