SW - Calculating Magnitudes
... We have seen how apparent magnitude describes how bright an object is to an observer and why the apparent brightness of a star varies in relation to its distance from Earth. However, in order to determine how bright an object is relative to other objects in the Universe, we must account for the obje ...
... We have seen how apparent magnitude describes how bright an object is to an observer and why the apparent brightness of a star varies in relation to its distance from Earth. However, in order to determine how bright an object is relative to other objects in the Universe, we must account for the obje ...
Photoelectric Photometry of the Pleiades
... star and make measurements. Different filters can be selected for each observation, and the integration time (the length of time the photometer samples the starlight) is adjustable. The computer also does much of the busy work needed to convert photon counts into apparent magnitude and provides an e ...
... star and make measurements. Different filters can be selected for each observation, and the integration time (the length of time the photometer samples the starlight) is adjustable. The computer also does much of the busy work needed to convert photon counts into apparent magnitude and provides an e ...
Life Cycle of a Star
... Step 4: Middle-aged star • Red giant- very bright, once an average star, but is now close to end of life - Has expanded to many times its original size (heat causes it to expand) - Hydrogen core has turned to helium and eventually to carbon - Our sun will become a red giant star in about 5 ...
... Step 4: Middle-aged star • Red giant- very bright, once an average star, but is now close to end of life - Has expanded to many times its original size (heat causes it to expand) - Hydrogen core has turned to helium and eventually to carbon - Our sun will become a red giant star in about 5 ...
the star
... • The sun – a typical yellow dwarf star. Type G2 with 8 planets • Proxima Centauri – closest of the triplet of stars loosely known as alpha-Centauri Proxima Centauri is a faint red star that orbits Alpha-Centauri A and B with a period of about one million years. Proxima Centauri is 4.22 light ye ...
... • The sun – a typical yellow dwarf star. Type G2 with 8 planets • Proxima Centauri – closest of the triplet of stars loosely known as alpha-Centauri Proxima Centauri is a faint red star that orbits Alpha-Centauri A and B with a period of about one million years. Proxima Centauri is 4.22 light ye ...
White Dwarfs
... Globular clusters formed 12-14 billion years ago. Useful info for studying the history of the Milky Way Galaxy. ...
... Globular clusters formed 12-14 billion years ago. Useful info for studying the history of the Milky Way Galaxy. ...
Be Stars
... Based on temperature there are different spectral types stars can be classed into. The different spectral types that stars can be classified into are; O, B, A, F, G, K and M. O stars are the hottest, meaning the temperature of the types of stars in the diagram declines. In each spectral type there a ...
... Based on temperature there are different spectral types stars can be classed into. The different spectral types that stars can be classified into are; O, B, A, F, G, K and M. O stars are the hottest, meaning the temperature of the types of stars in the diagram declines. In each spectral type there a ...
Slide 1 - Typepad
... lighting (referred to as "light pollution"), this scale describes what is shown when you query ECU about Magnitudes: ...
... lighting (referred to as "light pollution"), this scale describes what is shown when you query ECU about Magnitudes: ...
Types of Stars http://space.about.com/od/stars/tp/What-Are
... star is a system of two stars that are gravitationally bound to each other. They orbit around a common point, called the center of mass. It is estimated that about half of all the stars in our galaxy are part of a binary system. Visual binaries can be seen as two separate stars through a telescope. ...
... star is a system of two stars that are gravitationally bound to each other. They orbit around a common point, called the center of mass. It is estimated that about half of all the stars in our galaxy are part of a binary system. Visual binaries can be seen as two separate stars through a telescope. ...
Life Histories Stars
... Temperatures in the cores of large stars are much higher than the core temperatures of smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though lar ...
... Temperatures in the cores of large stars are much higher than the core temperatures of smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though lar ...
PPTX
... Merc, Venus always near Sun. Others, up to 180o away. Motion is slower than Sun, Moon. Generally eastward, but loops to west ...
... Merc, Venus always near Sun. Others, up to 180o away. Motion is slower than Sun, Moon. Generally eastward, but loops to west ...
ASTR-1020: Astronomy II Course Lecture Notes - Faculty
... As you can see, the most luminous stars in the Galaxy only remain on the main sequence for 57 thousand years, whereas a star like Vega (A0 V) will remain for 370 million years (Vega is relatively young), and an M0 V star will remain on the main sequence for 57 billion years! Since the Universe is ab ...
... As you can see, the most luminous stars in the Galaxy only remain on the main sequence for 57 thousand years, whereas a star like Vega (A0 V) will remain for 370 million years (Vega is relatively young), and an M0 V star will remain on the main sequence for 57 billion years! Since the Universe is ab ...
Life Histories Of Some Stars
... Temperatures in the cores of large stars are much higher than the core temperatures of smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though lar ...
... Temperatures in the cores of large stars are much higher than the core temperatures of smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though lar ...
October 2014 - Newbury Astronomical Society
... Stars were originally classified in groups designated by a letter in sequence from ‘A’ through the alphabet. The original sequence was defined by the apparent age of the star. Later this sequence was found to be wrong. However the class letters for each kind of star were retained but now they are no ...
... Stars were originally classified in groups designated by a letter in sequence from ‘A’ through the alphabet. The original sequence was defined by the apparent age of the star. Later this sequence was found to be wrong. However the class letters for each kind of star were retained but now they are no ...
Life Histories Of Some Stars
... smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though larger stars have more hydrogen reserves, they fuse hydrogen into helium at a much higher ...
... smaller stars. The higher the temperature inside a star, the faster hydrogen nuclei move. And the faster hydrogen nuclei move, the more likely it is that two nuclei will hit each other and fuse. So even though larger stars have more hydrogen reserves, they fuse hydrogen into helium at a much higher ...
btg_2016_astromony
... constellation Orion, are blue. Others, like Altair in Aquila, are white. Arcturus, a bright star in the northern spring sky, is yellow-orange. Yet others, like Betelguese in Orion or Antares in Scorpius are a deeper orange-red. The closest neighboring stars to our sun Alpha (one of the pointer stars ...
... constellation Orion, are blue. Others, like Altair in Aquila, are white. Arcturus, a bright star in the northern spring sky, is yellow-orange. Yet others, like Betelguese in Orion or Antares in Scorpius are a deeper orange-red. The closest neighboring stars to our sun Alpha (one of the pointer stars ...
procedure processing the data - Mr. Traeger`s Earth Science
... your left and right eye. Describe what you see. What happened to the parallax angle the farther away you moved the pencil? What happened to the parallax angle the closer you moved the pencil? ...
... your left and right eye. Describe what you see. What happened to the parallax angle the farther away you moved the pencil? What happened to the parallax angle the closer you moved the pencil? ...
Lecture 9: Post-main sequence evolution of stars Lifespan on the
... approximately constant, since the nuclear reactions are very temperature sensitive ...
... approximately constant, since the nuclear reactions are very temperature sensitive ...
The Magnitude System
... Magnitudes have to be somehow related to the brightness of stars. And brightness is a measure of the total number of photons of energy E that are emitted from the star per second and that pass though the area of our detectors. The unit of brightness is ergs/sec/cm2, or if you use SI units, it is Wat ...
... Magnitudes have to be somehow related to the brightness of stars. And brightness is a measure of the total number of photons of energy E that are emitted from the star per second and that pass though the area of our detectors. The unit of brightness is ergs/sec/cm2, or if you use SI units, it is Wat ...
Slide 1 - Personal.psu.edu
... Summary of Chapter 19 (cont.) • The protostar continues to collapse; when the core is dense and hot enough, fusion begins • The star continues to collapse until the inward force of gravity is balanced by the outward pressure from the core. The star is now on the Main Sequence • More massive stars f ...
... Summary of Chapter 19 (cont.) • The protostar continues to collapse; when the core is dense and hot enough, fusion begins • The star continues to collapse until the inward force of gravity is balanced by the outward pressure from the core. The star is now on the Main Sequence • More massive stars f ...
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 ...
Measuring Stars
... which are called Visual binaries. Many visual binaries have long orbital periods of several centuries or millennia. In many cases a binary system is too far away, or the stars are too close, or one star is so much brighter than the other that we cannot distinguish the two stars visually. But still w ...
... which are called Visual binaries. Many visual binaries have long orbital periods of several centuries or millennia. In many cases a binary system is too far away, or the stars are too close, or one star is so much brighter than the other that we cannot distinguish the two stars visually. But still w ...
The Stars - Department of Physics and Astronomy
... It is estimated that the total lifetime of our Sun is 12 billion years. Roughly, how far is it through its hydrogenburning phase now? ...
... It is estimated that the total lifetime of our Sun is 12 billion years. Roughly, how far is it through its hydrogenburning phase now? ...
Related Handout - Orange County Astronomers
... Mars is the last of the terrestrial planets. Its diameter is 4,116 miles, its mass 11% of Earth’s, and it circles the Sun in 1.88 years at an average distance of 1.5 AU. The planet is cratered, has a thin atmosphere of carbon dioxide, and has two small moons, Deimos and Phobos, beyond the reach of t ...
... Mars is the last of the terrestrial planets. Its diameter is 4,116 miles, its mass 11% of Earth’s, and it circles the Sun in 1.88 years at an average distance of 1.5 AU. The planet is cratered, has a thin atmosphere of carbon dioxide, and has two small moons, Deimos and Phobos, beyond the reach of t ...
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.