Polaris
... The North Star or Pole Star – aka Polaris – is famous for holding nearly still in our sky while the entire northern sky moves around it. That’s because it’s located nearly at the north celestial pole, the point around which the entire northern sky turns. Polaris marks the way due north. As you face ...
... The North Star or Pole Star – aka Polaris – is famous for holding nearly still in our sky while the entire northern sky moves around it. That’s because it’s located nearly at the north celestial pole, the point around which the entire northern sky turns. Polaris marks the way due north. As you face ...
telling time at night
... through the night and throughout the seasons. Its stars are the same brightness as the North Star. The last two stars of the Dipper are called the “Pointers.” A line from them passes near the North Star (figure 3). Once you have become familiar with the shape of the Big Dipper, you can usually locat ...
... through the night and throughout the seasons. Its stars are the same brightness as the North Star. The last two stars of the Dipper are called the “Pointers.” A line from them passes near the North Star (figure 3). Once you have become familiar with the shape of the Big Dipper, you can usually locat ...
A Human-Powered Orrery: Connecting Learners with the Night Sky*
... available (See Fig. 3). The largest, and heaviest uses aluminum pie pans (See Fig. 3 and Fig. 7, page 11). This can take as long as 45 minutes to set up, similar to the one in the YouTube video. We have used this only when we have extra time such as an overnight with lots of help. However, this mo ...
... available (See Fig. 3). The largest, and heaviest uses aluminum pie pans (See Fig. 3 and Fig. 7, page 11). This can take as long as 45 minutes to set up, similar to the one in the YouTube video. We have used this only when we have extra time such as an overnight with lots of help. However, this mo ...
5 Understanding stars and star ClUsters
... pulsation periods of less than a day and variation of about one magnitude. They are somewhat similar to the Cepheid variables in that they pulsate regularly. As with the Cepheids there is a relationship between the pulsation period of RR Lyrae stars and their luminosity, and so they are useful as di ...
... pulsation periods of less than a day and variation of about one magnitude. They are somewhat similar to the Cepheid variables in that they pulsate regularly. As with the Cepheids there is a relationship between the pulsation period of RR Lyrae stars and their luminosity, and so they are useful as di ...
HR DIAGRAM (Page 1) - McDonald Observatory
... instance, the faintest stars our eyes alone may see are apparent magnitude 6. A fairly bright star like Sirius is magnitude -1.4, while the sun is a blinding -26. For each single step up or down on the magnitude scale, the brightness changes by a factor of 2.512. And for every five steps, the bright ...
... instance, the faintest stars our eyes alone may see are apparent magnitude 6. A fairly bright star like Sirius is magnitude -1.4, while the sun is a blinding -26. For each single step up or down on the magnitude scale, the brightness changes by a factor of 2.512. And for every five steps, the bright ...
The Origin, Structure, and Evolution of the Stars
... stars differ enormously in their sizes and also in the amount of energy they radiate A significant question of physical makeup of stars arises what is the most fundamental physical difference between the low luminosity red stars of the main sequence and the high luminosity blue stars of the upper ma ...
... stars differ enormously in their sizes and also in the amount of energy they radiate A significant question of physical makeup of stars arises what is the most fundamental physical difference between the low luminosity red stars of the main sequence and the high luminosity blue stars of the upper ma ...
Satellities - stoweschools.com
... Bipolar Star System Two stars 8x1010m apart rotate about a point 4x1010 m from each other in a circular path in 12.6 years. The two stars have the same mass. What is the mass of the stars? Fg causes the centripetal acceleration therefore Fg = Fc ...
... Bipolar Star System Two stars 8x1010m apart rotate about a point 4x1010 m from each other in a circular path in 12.6 years. The two stars have the same mass. What is the mass of the stars? Fg causes the centripetal acceleration therefore Fg = Fc ...
Lecture 2 Understand the sky we see from the Earth
... • What is the cause of the seasons on Earth? • As the Earth orbits the sun, the tilt of the axis causes different portions of the Earth to receive more or less direct sunlight at different times of year. The two hemispheres have opposite seasons. The summer solstice is the time when the northern hem ...
... • What is the cause of the seasons on Earth? • As the Earth orbits the sun, the tilt of the axis causes different portions of the Earth to receive more or less direct sunlight at different times of year. The two hemispheres have opposite seasons. The summer solstice is the time when the northern hem ...
Observing Jupiter and Saturn with a Vixen 80mm Fluorite Refractor
... It sounds like an impossible task: Take a star a hundred times larger in diameter and millions of times more luminous than the Sun and hide it in our own galaxy where the most powerful optical telescopes on Earth cannot find it. But it is not impossible. In fact, there could be dozens to hundreds of ...
... It sounds like an impossible task: Take a star a hundred times larger in diameter and millions of times more luminous than the Sun and hide it in our own galaxy where the most powerful optical telescopes on Earth cannot find it. But it is not impossible. In fact, there could be dozens to hundreds of ...
previous lectures - Gwynedd Astronomy Society
... Comets and Giotto Eruptive variable and eclipsing binary stars Origin of the universe Venus Shareware astronomical computer programmes NASA's Mission to Planet Earth Astrophotography Computing and rocket technology ...
... Comets and Giotto Eruptive variable and eclipsing binary stars Origin of the universe Venus Shareware astronomical computer programmes NASA's Mission to Planet Earth Astrophotography Computing and rocket technology ...
Red Dwarf Stars: Ages, Rotation, Magnetic
... tionary age. Two recent independent age determinations for the 40 Eri B are essentially identical, yielding an age of 5.1±0.7 Gyr (Ballouz et al. 2010; Zhao et al. 2011). We used this WD age to calibrate the measured Ca ii HK and coronal X-ray luminosity (LX ) of the K1 V and M4.5 V stars. We have b ...
... tionary age. Two recent independent age determinations for the 40 Eri B are essentially identical, yielding an age of 5.1±0.7 Gyr (Ballouz et al. 2010; Zhao et al. 2011). We used this WD age to calibrate the measured Ca ii HK and coronal X-ray luminosity (LX ) of the K1 V and M4.5 V stars. We have b ...
Stellar Evolution
... Why clusters are important For both open and globular clusters: • all the stars are at about the same distance from the Earth • all the stars formed at about the same time Determining the distance and age to a globular cluster is much easier than trying to find the distances and ages of a million r ...
... Why clusters are important For both open and globular clusters: • all the stars are at about the same distance from the Earth • all the stars formed at about the same time Determining the distance and age to a globular cluster is much easier than trying to find the distances and ages of a million r ...
12 The Milky Way - Journigan-wiki
... red whose ages are about 1010 years old. They lie in the bulge or halo and have highly elliptical orbits that may be heavily tilted with respect to the galactic disk. These stars are mostly hydrogen and helium as well with only a few 100th’s of a percent as heavy elements. ...
... red whose ages are about 1010 years old. They lie in the bulge or halo and have highly elliptical orbits that may be heavily tilted with respect to the galactic disk. These stars are mostly hydrogen and helium as well with only a few 100th’s of a percent as heavy elements. ...
Archaeoastronomical Study of the Main Pyramids of Giza
... that time, while Alnitak, the lowest star of the Belt at its culmination, corresponded to the Khufu pyramid, the lowest one in the maps. Obviously this choice is opposite to that adopted by the cartographers of the XVII century who decided to put North on the top of their maps, a convention that we ...
... that time, while Alnitak, the lowest star of the Belt at its culmination, corresponded to the Khufu pyramid, the lowest one in the maps. Obviously this choice is opposite to that adopted by the cartographers of the XVII century who decided to put North on the top of their maps, a convention that we ...
10 - Keele Astrophysics Group
... grouped together stars depending on the prominence of particular spectral lines: hydrogen lines, helium lines and lines of some metallic ions. Astronomers at Harvard Observatory further developed and refined these early classification schemes and spectral types were defined to reflect a smooth chang ...
... grouped together stars depending on the prominence of particular spectral lines: hydrogen lines, helium lines and lines of some metallic ions. Astronomers at Harvard Observatory further developed and refined these early classification schemes and spectral types were defined to reflect a smooth chang ...
Teacher`s Guide - Cornell Science Inquiry Partnerships
... This activity serves as an introduction to stellar astronomy, but it also works as an illustration of the general methods that scientists use when confronted with a new set of data that they are trying to understand. Subject Astronomy, Earth Science Audience This activity is aimed at a high school a ...
... This activity serves as an introduction to stellar astronomy, but it also works as an illustration of the general methods that scientists use when confronted with a new set of data that they are trying to understand. Subject Astronomy, Earth Science Audience This activity is aimed at a high school a ...
LESSON 8: STARS
... shockwave of material that explodes into space. This explosion is called a supernova, and will increase the luminosity of the star by a factor of millions. A supernova is much more powerful than a nova and will be extremely bright for a few weeks or months, until it gradually subsides and dims. What ...
... shockwave of material that explodes into space. This explosion is called a supernova, and will increase the luminosity of the star by a factor of millions. A supernova is much more powerful than a nova and will be extremely bright for a few weeks or months, until it gradually subsides and dims. What ...
EVALUATION OF FINNIS+ ASTRONOM<
... In fact, astronomy is the study (by whatever technique) of everything that is more than about 100 km above the Earth, and the study of the Earth in its entirety as a planet. The aim of astronomy is to understand large-scale natural phenomena. It has the possibility to discover new science through th ...
... In fact, astronomy is the study (by whatever technique) of everything that is more than about 100 km above the Earth, and the study of the Earth in its entirety as a planet. The aim of astronomy is to understand large-scale natural phenomena. It has the possibility to discover new science through th ...
The Milky Way`s Restless Swarms of Stars
... the orbits in each pair grow tighter after Somewhat better understood are the weird repeated interactions. A cluster might last a objects that arise when stars near a cluster’s holes, astronomers used HST to measure the billion years, 10 billion years, or more, core smash together. Once again, binar ...
... the orbits in each pair grow tighter after Somewhat better understood are the weird repeated interactions. A cluster might last a objects that arise when stars near a cluster’s holes, astronomers used HST to measure the billion years, 10 billion years, or more, core smash together. Once again, binar ...
Stellar Populations of Galaxies- 2 Lectures H
... We shall use this information later to see how one estimates the star formation history of a galaxy and the universe ...
... We shall use this information later to see how one estimates the star formation history of a galaxy and the universe ...
Globular Clusters Dynamic Lives The
... right: globular cluster cores do collapse, but the collapse is arrested by the presence of one or more hard binaries. Precollapse clusters can look just like the King-Michie models, and some stabilized postcollapse ones can too. But clusters that have undergone a recent collapse and recovery still r ...
... right: globular cluster cores do collapse, but the collapse is arrested by the presence of one or more hard binaries. Precollapse clusters can look just like the King-Michie models, and some stabilized postcollapse ones can too. But clusters that have undergone a recent collapse and recovery still r ...
How Marius Was Right and Galileo Was Wrong Even Though
... and as Marius was a careful observer who looked for consistency between theory and observation (as can be seen in his study of the Jovian moons), we may conclude16 that Marius has followed the observations through to at least some of the conclusions reached ...
... and as Marius was a careful observer who looked for consistency between theory and observation (as can be seen in his study of the Jovian moons), we may conclude16 that Marius has followed the observations through to at least some of the conclusions reached ...
Sample pages 1 PDF
... However, he could not explain this possible relationship. Was it that of cause and effect between the two, or was there something else involved that “… gave origin to both the change of weather and the meteors?” (Olmsted 1834a, p. 402). The meteors were at their most striking in frequency and brilli ...
... However, he could not explain this possible relationship. Was it that of cause and effect between the two, or was there something else involved that “… gave origin to both the change of weather and the meteors?” (Olmsted 1834a, p. 402). The meteors were at their most striking in frequency and brilli ...
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.