The Changing Heavens Over Time Key Commands Constellations
... 5. Find the year when Polaris is furthest from the pole to the closest thousand years. [Hint: The DE will be between 40o and 50o.] This will be many thousands of years in the future, so move ahead in 2000 year increments until you get close. __________________ 6. Find the year when Polaris is back a ...
... 5. Find the year when Polaris is furthest from the pole to the closest thousand years. [Hint: The DE will be between 40o and 50o.] This will be many thousands of years in the future, so move ahead in 2000 year increments until you get close. __________________ 6. Find the year when Polaris is back a ...
Characteristics of Stars
... is plotted on the X- axis. 15.The diagonal or S shape region in the centre of the H-R diagram is called the __ main sequence and this shows stars in the prime of their lives . . 16.ln these stars, the force of Jlravity pushing in equals the force of nuclear _fusion__ pushing out and so the star is s ...
... is plotted on the X- axis. 15.The diagonal or S shape region in the centre of the H-R diagram is called the __ main sequence and this shows stars in the prime of their lives . . 16.ln these stars, the force of Jlravity pushing in equals the force of nuclear _fusion__ pushing out and so the star is s ...
Distances farther out
... but orbital planes of binaries inclined to line of sight by some angle hence can only get lower limits to velocities and masses. If binary eclipses , from light curve get angle of inclination and hence accurate masses. Eg of eclipsing binary K stars: 1) ζ Aurigae (faintest of the ‘kids’ of Cappell ...
... but orbital planes of binaries inclined to line of sight by some angle hence can only get lower limits to velocities and masses. If binary eclipses , from light curve get angle of inclination and hence accurate masses. Eg of eclipsing binary K stars: 1) ζ Aurigae (faintest of the ‘kids’ of Cappell ...
Antares - Emmi
... used to measure incredibly hot objects or stars Kelvin is 272 degrees Celsius) Even though Antares is much colder it is brighter because it is much larger ...
... used to measure incredibly hot objects or stars Kelvin is 272 degrees Celsius) Even though Antares is much colder it is brighter because it is much larger ...
Constellation Chart Activity
... a) Find 6h of Right Ascension at the bottom of the map. The date written right below it is _________________. That means that if you go outside at 8 PM local time on that date, that line would be YOUR Meridian. b) Find Orion and Gemini along that 6h RA line. On that date at that time, Orion will be ...
... a) Find 6h of Right Ascension at the bottom of the map. The date written right below it is _________________. That means that if you go outside at 8 PM local time on that date, that line would be YOUR Meridian. b) Find Orion and Gemini along that 6h RA line. On that date at that time, Orion will be ...
The most important questions to study for the exam
... • It is the total energy emitted by the star per second, measured in joules/second or watts. • It is the apparent magnitude a star would have if it were at an infinite distance. • It is the apparent magnitude a star would have if it were at a standard distance of 10 pc. 13. According to the inverse- ...
... • It is the total energy emitted by the star per second, measured in joules/second or watts. • It is the apparent magnitude a star would have if it were at an infinite distance. • It is the apparent magnitude a star would have if it were at a standard distance of 10 pc. 13. According to the inverse- ...
Birth and Death of Stars
... • By plotting stars by their surface temperature against their luminosity gives us a consistent pattern called the Hertzsprung – Russell (H-R) diagram . • Astronomers use the H-R diagram to describe the life cycles of stars. • Most stars that are plotted fall within a band that runs through the midd ...
... • By plotting stars by their surface temperature against their luminosity gives us a consistent pattern called the Hertzsprung – Russell (H-R) diagram . • Astronomers use the H-R diagram to describe the life cycles of stars. • Most stars that are plotted fall within a band that runs through the midd ...
DSLR photometry - British Astronomical Association
... P Cygni is a hypergiant luminous blue variable and is intrinsically one of the most luminous stars in the Milky Way galaxy (610,000 as luminous as the Sun) The star is located about 5000 to 6000 light years from the Earth. Today it has an estimated magnitude of 4.8 ± 0.5 Part of an ongoing campaign ...
... P Cygni is a hypergiant luminous blue variable and is intrinsically one of the most luminous stars in the Milky Way galaxy (610,000 as luminous as the Sun) The star is located about 5000 to 6000 light years from the Earth. Today it has an estimated magnitude of 4.8 ± 0.5 Part of an ongoing campaign ...
Properties of Stars
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, mediummass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plane ...
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, mediummass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plane ...
Objectives
... become hot enough to fuse heavier elements in their core • These shrink very rapidly and rebound with a tremendous shock wave which blows apart the entire shell of the star in an explosion called a… Supernova!!! Star field seen before supernova ...
... become hot enough to fuse heavier elements in their core • These shrink very rapidly and rebound with a tremendous shock wave which blows apart the entire shell of the star in an explosion called a… Supernova!!! Star field seen before supernova ...
Stars
... • Luminosity - A star produces light – the total amount of energy that a star puts out as light each second is called its Luminosity. • Flux - If we have a light detector (eye, camera, telescope) we can measure the light produced by the star – the total amount of energy intercepted by the detector d ...
... • Luminosity - A star produces light – the total amount of energy that a star puts out as light each second is called its Luminosity. • Flux - If we have a light detector (eye, camera, telescope) we can measure the light produced by the star – the total amount of energy intercepted by the detector d ...
If you wish to a copy of this months Night Sky News
... Castor B is now also known to be a spectroscopic binary whose components are even closer, at only 4.5 million km distance and having an orbital period of only three days. A distant 9th mag. companion star was also discovered 150 billion km (1000 AU) distant from the A-B pair. It was also detected as ...
... Castor B is now also known to be a spectroscopic binary whose components are even closer, at only 4.5 million km distance and having an orbital period of only three days. A distant 9th mag. companion star was also discovered 150 billion km (1000 AU) distant from the A-B pair. It was also detected as ...
the lives of stars
... lightweight elements that are gases. There is so much hydrogen and helium in a star that the weight of these gases is enormous. In the center of a star, the pressure is great enough to heat the gases and cause nuclear fusion reactions. In a nuclear fusion reaction, the nuclei, or centers of two atom ...
... lightweight elements that are gases. There is so much hydrogen and helium in a star that the weight of these gases is enormous. In the center of a star, the pressure is great enough to heat the gases and cause nuclear fusion reactions. In a nuclear fusion reaction, the nuclei, or centers of two atom ...
The most important questions to study for the exam
... • It consists almost entirely of hot, bright stars. 8. A certain star is seen to have a relatively low surface temperature but a very high luminosity. What can we conclude from these observations? • The star is a main-sequence star, about the size of the Sun. • The star must be very large. • The sta ...
... • It consists almost entirely of hot, bright stars. 8. A certain star is seen to have a relatively low surface temperature but a very high luminosity. What can we conclude from these observations? • The star is a main-sequence star, about the size of the Sun. • The star must be very large. • The sta ...
review
... than (for example) the Crab and Vela pulsars is that they • A. were formed from much more massive stars than were the Crab and Vela pulsars, and were spun up more as their cores collapsed to a smaller volume. • B.are normal pulsars, whereas the Crab and Vela pulsars have been slowed down from millis ...
... than (for example) the Crab and Vela pulsars is that they • A. were formed from much more massive stars than were the Crab and Vela pulsars, and were spun up more as their cores collapsed to a smaller volume. • B.are normal pulsars, whereas the Crab and Vela pulsars have been slowed down from millis ...
lect3 — 1 Measuring stars: What can be measured?
... main sequence star very far away; they are just not that bright. Worse, the brightest (OB) stars tend to be somewhat variable, and their color doesn’t translate into luminosity quite so tightly as for something like the Sun. Cepheids: Classically, this is the most reliable stellar standard candle. T ...
... main sequence star very far away; they are just not that bright. Worse, the brightest (OB) stars tend to be somewhat variable, and their color doesn’t translate into luminosity quite so tightly as for something like the Sun. Cepheids: Classically, this is the most reliable stellar standard candle. T ...
The colour-magnitude diagram
... Different effective temperatures correspond to: • different spectral types • different colours ...
... Different effective temperatures correspond to: • different spectral types • different colours ...
Red Giants - Uplift North Hills Prep
... the time. However, he changed his mind four years later after deriving the same result by different means. After Payne was proven correct, Russell briefly credited Payne for discovering that the Sun had a different chemical composition from Earth in his paper. However the credit was still generally ...
... the time. However, he changed his mind four years later after deriving the same result by different means. After Payne was proven correct, Russell briefly credited Payne for discovering that the Sun had a different chemical composition from Earth in his paper. However the credit was still generally ...
August Newsletter
... Corona Australis is a small, compact constellation located between Sagittarius and Scorpius, just east of the scorpion's stinger. (We also have the other crown Corona Borealis in the sky too for a short time, one of the few times in the year when both crowns appear in our sky together). Lyra, the Ly ...
... Corona Australis is a small, compact constellation located between Sagittarius and Scorpius, just east of the scorpion's stinger. (We also have the other crown Corona Borealis in the sky too for a short time, one of the few times in the year when both crowns appear in our sky together). Lyra, the Ly ...
proper motion
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
There are 88 constellations in the sky around the Earth. 12 are the
... became a popular sport of kings and a necessity to keep their populations down. The lion is associated with the warrior goddess, Istar. Representations of the hero-king Gilgamesh often show him with a club in one hand and a lion in the other. The sickle shape of the constellation containing the bri ...
... became a popular sport of kings and a necessity to keep their populations down. The lion is associated with the warrior goddess, Istar. Representations of the hero-king Gilgamesh often show him with a club in one hand and a lion in the other. The sickle shape of the constellation containing the bri ...
White Dwarfs - Indiana University
... – Proper motions of Sirius and Procyon wobble – Suggested they orbited “dark stars” – Found Sirius B at Northwestern’s Dearborn Observatory – Was it a star that had cooled and dimmed? ...
... – Proper motions of Sirius and Procyon wobble – Suggested they orbited “dark stars” – Found Sirius B at Northwestern’s Dearborn Observatory – Was it a star that had cooled and dimmed? ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.