Stars, Galaxies, and the Universe Section 1
... • Stars vary in size and mass. • Stars such as the sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less mas ...
... • Stars vary in size and mass. • Stars such as the sun are considered medium-sized stars. The sun has a diameter of 1,390,000 km. • Most of the stars you can see in the night sky are medium-sized stars. • Many stars also have about the same mass as the sun, however some stars may be more or less mas ...
Orion – The Hunter - Guild of Students
... taught the people justice and agriculture. This earned him the name Onnophris ('the good one'). He left Egypt to civilise the entire world and Isis did a very good job of running the kingdom in his absence. He met his end when his brother Set got jealous and built him a coffin. He then held an enorm ...
... taught the people justice and agriculture. This earned him the name Onnophris ('the good one'). He left Egypt to civilise the entire world and Isis did a very good job of running the kingdom in his absence. He met his end when his brother Set got jealous and built him a coffin. He then held an enorm ...
PPT presentation
... luminosity functions, indistinguishable from those observed in the spiral galaxies M31 and M81. The invariance with galaxy type and metallicity demonstrated the PNLF to be an excellent standard candle. Model simulations indicated a central star mass distribution highly peaked at ~0.6 Msun, similar t ...
... luminosity functions, indistinguishable from those observed in the spiral galaxies M31 and M81. The invariance with galaxy type and metallicity demonstrated the PNLF to be an excellent standard candle. Model simulations indicated a central star mass distribution highly peaked at ~0.6 Msun, similar t ...
81 KB - CSIRO Publishing
... may initially be based on appearance to the human eye (e.g. Hubble 1926), but to make progress this taxonomy may need to have some basis in the underlying nature or physics of the objects being examined. With this mind, astronomers need a working definition so as to divide objects into different cat ...
... may initially be based on appearance to the human eye (e.g. Hubble 1926), but to make progress this taxonomy may need to have some basis in the underlying nature or physics of the objects being examined. With this mind, astronomers need a working definition so as to divide objects into different cat ...
Chapter 12: Stars and Galaxies
... Sometimes when a continuous spectrum is examined in a spectroscope, some dark lines might be seen. This is called an absorption spectrum. Absorption spectra are produced when the light emitted from a hot, dense material passes through a cooler, less dense gas. Atoms in the cooler gas absorb certain ...
... Sometimes when a continuous spectrum is examined in a spectroscope, some dark lines might be seen. This is called an absorption spectrum. Absorption spectra are produced when the light emitted from a hot, dense material passes through a cooler, less dense gas. Atoms in the cooler gas absorb certain ...
The 2008 RBSE Journal - National Optical Astronomy Observatory
... and usually end up being bigger than the originating galaxy. The smallest known are only a few tens of parsecs across, while the largest are known to be up to several megaparsecs. The average radio galaxy is usually typically hundreds of kiloparsecs across. This is about twice the size of the Milky ...
... and usually end up being bigger than the originating galaxy. The smallest known are only a few tens of parsecs across, while the largest are known to be up to several megaparsecs. The average radio galaxy is usually typically hundreds of kiloparsecs across. This is about twice the size of the Milky ...
HR Diagram
... Check show isoradius lines. Note that at each point on a green line, stars have the same value of radius. Use these isoradius lines to check your answers in the table above. ...
... Check show isoradius lines. Note that at each point on a green line, stars have the same value of radius. Use these isoradius lines to check your answers in the table above. ...
Curiosities of the Sky
... stars whose actual distances apart is great, offers another quandary; persistent and sharply bordered apertures in such an assemblage are a priori as improbable, if not impossible, as straight, narrow holes running through a swarm of bees. The difficulty of these questions indicates one of the reaso ...
... stars whose actual distances apart is great, offers another quandary; persistent and sharply bordered apertures in such an assemblage are a priori as improbable, if not impossible, as straight, narrow holes running through a swarm of bees. The difficulty of these questions indicates one of the reaso ...
Absolute magnitudes and kinematics of barium
... (Jorissen & Boffin 1992) and that the orbital period is related to the orbital separation. It may be possible that mild barium stars have wider separations between components, making more difficult the detection of their binary nature. If we consider the stars with known orbits or with variable radi ...
... (Jorissen & Boffin 1992) and that the orbital period is related to the orbital separation. It may be possible that mild barium stars have wider separations between components, making more difficult the detection of their binary nature. If we consider the stars with known orbits or with variable radi ...
chapter 24 instructor notes
... In 1837 Argelander, of the Bonn Observatory and orginator of the BD catalogue, was able to derive an apex for the solar motion from studying stellar proper motions. His result is very similar to that recognized today. Also in 1837, Frederick Struve found evidence for interstellar extinction in star ...
... In 1837 Argelander, of the Bonn Observatory and orginator of the BD catalogue, was able to derive an apex for the solar motion from studying stellar proper motions. His result is very similar to that recognized today. Also in 1837, Frederick Struve found evidence for interstellar extinction in star ...
Deriving the Isoradius Lines (optional, mathematical
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you to control the variables plotted on the x-axis: (temperature, BV, or spectral type) and those plotted on the y- ...
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you to control the variables plotted on the x-axis: (temperature, BV, or spectral type) and those plotted on the y- ...
Star formation and internal kinematics of irregular galaxies
... (a few times) the local scale height. In most cases this is a few hundred parsecs. This is the picture that I will proceed with in this thesis; that star formation is a local process, with the same basic physics occuring in independent cells with dimensions between tens of parsecs and a couple of ki ...
... (a few times) the local scale height. In most cases this is a few hundred parsecs. This is the picture that I will proceed with in this thesis; that star formation is a local process, with the same basic physics occuring in independent cells with dimensions between tens of parsecs and a couple of ki ...
A Collection of Curricula for the STARLAB Polynesian Voyaging
... The kahako, the little dash over a vowel, denotes a stressed vowel sound. The ‘okina (‘), or glottal stop, signals a halting of breath before a vowel. Many centuries ago people looked up at the sky at night and thought that groups of stars formed figures. To these figures they gave names to honor ch ...
... The kahako, the little dash over a vowel, denotes a stressed vowel sound. The ‘okina (‘), or glottal stop, signals a halting of breath before a vowel. Many centuries ago people looked up at the sky at night and thought that groups of stars formed figures. To these figures they gave names to honor ch ...
Galaxy Powerpoint Notes
... The creation of galaxies is a very mysterious topic as it is uncertain of how the universe was created. The most common theory however, is the theory of the Big Bang, which states that the universe expanded from a very dense state and continues to expand today. Another common prediction of how galax ...
... The creation of galaxies is a very mysterious topic as it is uncertain of how the universe was created. The most common theory however, is the theory of the Big Bang, which states that the universe expanded from a very dense state and continues to expand today. Another common prediction of how galax ...
CONSTELLATION PERSEUS The constellation
... it was called Horus in Egyptian mythology and Rosh ha Satan ("Satan's Head") in Hebrew. Located 92.8 light-years from Earth, it varies in apparent magnitude from a minimum of 3.5 to a maximum of 2.3 over a period of 2.867 days. The star system is the prototype of a group of eclipsing binary stars na ...
... it was called Horus in Egyptian mythology and Rosh ha Satan ("Satan's Head") in Hebrew. Located 92.8 light-years from Earth, it varies in apparent magnitude from a minimum of 3.5 to a maximum of 2.3 over a period of 2.867 days. The star system is the prototype of a group of eclipsing binary stars na ...
Galaxies
... Dark Matter in the Universe There is evidence for intracluster superhot gas (about 106 K) throughout clusters, densest in the center This head–tail radio galaxy’s lobes are being swept back, probably because of collisions with intracluster gas It is believed this gas is primordial—dating from ...
... Dark Matter in the Universe There is evidence for intracluster superhot gas (about 106 K) throughout clusters, densest in the center This head–tail radio galaxy’s lobes are being swept back, probably because of collisions with intracluster gas It is believed this gas is primordial—dating from ...
Star Trek ObservING List - Adirondack astronomy retreat
... It is said that Epsilon Eridani really has a planet. It was discovered by a man named W. Cochran on August 7th, 2000. His name is a real coincidence because a man named Zefram Cochrane, according to Star Trek TNG First Contact movie and TOS episode Metamorphosis, was the inventor of the warp drive w ...
... It is said that Epsilon Eridani really has a planet. It was discovered by a man named W. Cochran on August 7th, 2000. His name is a real coincidence because a man named Zefram Cochrane, according to Star Trek TNG First Contact movie and TOS episode Metamorphosis, was the inventor of the warp drive w ...
Ch 11a (Measuring Stars 10-28-10)
... IV. Stellar sizes (radius) Luminosity is proportional to surface area (how large) x temperature (how hot): L= 4R2T4 If we can measure the Luminosity and the temperature of a star we can tell how large its ...
... IV. Stellar sizes (radius) Luminosity is proportional to surface area (how large) x temperature (how hot): L= 4R2T4 If we can measure the Luminosity and the temperature of a star we can tell how large its ...
Activity : Milky Way
... If a supernova occurred within 50 light years of Earth, the gamma rays and high energy particles emitted during the explosion would kill most lifeforms and cause severe genetic damage in others. A local supernova explosion is a possible explanation for the extinction of the dinosaurs. The supermassi ...
... If a supernova occurred within 50 light years of Earth, the gamma rays and high energy particles emitted during the explosion would kill most lifeforms and cause severe genetic damage in others. A local supernova explosion is a possible explanation for the extinction of the dinosaurs. The supermassi ...
Spectral classification of O–M stars on the basis of UBV photometry
... In the process of spectral classification, about 60% of analyzed stars have been assigned to a single or two rather close estimates of spectra. In the last case an average value was adopted. Another 40% of stars have obtained two substantially different estimates of spectra. Double results of the cl ...
... In the process of spectral classification, about 60% of analyzed stars have been assigned to a single or two rather close estimates of spectra. In the last case an average value was adopted. Another 40% of stars have obtained two substantially different estimates of spectra. Double results of the cl ...
The Sun and Stars 4.1 Energy formation and layers of the Sun 4.2
... Prominences and Solar Flares. It is important for us to follow the Sunspot cycle to know when there is going to be an increase in Sunspots, because they cause Solar Flares and Prominences. Although the Earth’s magnetic field can deflect or pull in much of the energy that is carried in a solar flare, ...
... Prominences and Solar Flares. It is important for us to follow the Sunspot cycle to know when there is going to be an increase in Sunspots, because they cause Solar Flares and Prominences. Although the Earth’s magnetic field can deflect or pull in much of the energy that is carried in a solar flare, ...
8-4.9 - S2TEM Centers SC
... patches in the sky. Other galaxies appear as fuzzy spots in the sky when viewed with small telescopes.) All galaxies are the same. (The shapes of galaxies vary – some are elliptical, others are spiral, and still others have no definite shape. Galaxies differ in color, composition, orientation, age ...
... patches in the sky. Other galaxies appear as fuzzy spots in the sky when viewed with small telescopes.) All galaxies are the same. (The shapes of galaxies vary – some are elliptical, others are spiral, and still others have no definite shape. Galaxies differ in color, composition, orientation, age ...
Stellar Census
... of the entire population of stars in our galaxy? A representative sample includes all parts of the population of the objects your are investigating in their proper proportions The relative proportion of common things will be greater than the relative proportions of rare things In fact, the uncommon ...
... of the entire population of stars in our galaxy? A representative sample includes all parts of the population of the objects your are investigating in their proper proportions The relative proportion of common things will be greater than the relative proportions of rare things In fact, the uncommon ...
10 Astrophysics (Option E)
... The solar system is the name given to everything that orbits the Sun, including the planets and their moons, asteroids and comets. When modelling gravity, we treated orbits as circular for simplicity, but in fact, the planets have slightly elliptical orbits. An ellipse is a flattened circle with two ...
... The solar system is the name given to everything that orbits the Sun, including the planets and their moons, asteroids and comets. When modelling gravity, we treated orbits as circular for simplicity, but in fact, the planets have slightly elliptical orbits. An ellipse is a flattened circle with two ...
DTU_9e_ch12
... Horsehead Nebula is part of a larger complex of dark interstellar matter, seen in the lower left of this image. Above and to the left of the Horsehead Nebula is the reflection nebula NGC 2023, whose dust grains scatter blue light from stars between us and it more effectively than any other color. Al ...
... Horsehead Nebula is part of a larger complex of dark interstellar matter, seen in the lower left of this image. Above and to the left of the Horsehead Nebula is the reflection nebula NGC 2023, whose dust grains scatter blue light from stars between us and it more effectively than any other color. Al ...
Aries (constellation)
Aries is one of the constellations of the zodiac. It is located in the northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram, and its symbol is 20px (Unicode ♈), representing a ram's horns. It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation, ranking 39th overall size, with an area of 441 square degrees (1.1% of the celestial sphere).Although Aries came to represent specifically the ram whose fleece became the Golden Fleece of Ancient Greek mythology, it has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim (Gamma Arietis, fourth magnitude), and 41 Arietis (also fourth magnitude). The few deep-sky objects within the constellation are quite faint and include several pairs of interacting galaxies. Several meteor showers appear to radiate from Aries, including the Daytime Arietids and the Epsilon Arietids.