Celestial Equator
... May have shrunk 15% in radius since 1993. This probably does not indicate evolution at its center. 570 ly away. Variable star. 1000 times as luminous as the sun Rigel - brightest star in Orion by (a bit more than -Orionis = Betelgeuse – a variable) 7th brightest star in the sky. 770 ly. Most lumino ...
... May have shrunk 15% in radius since 1993. This probably does not indicate evolution at its center. 570 ly away. Variable star. 1000 times as luminous as the sun Rigel - brightest star in Orion by (a bit more than -Orionis = Betelgeuse – a variable) 7th brightest star in the sky. 770 ly. Most lumino ...
The Rigel Star - Emmi
... • Rigel is the ankle in the constellation Orion, a hunter from the Greek myths. • Orion was a great hunter and honest man. Because of this, he became the companion of Artemis, goddess of the hunt. This made Artemis’ twin, Apollo, jealous and he sent an enormous scorpion to sting Orion. Artemis was a ...
... • Rigel is the ankle in the constellation Orion, a hunter from the Greek myths. • Orion was a great hunter and honest man. Because of this, he became the companion of Artemis, goddess of the hunt. This made Artemis’ twin, Apollo, jealous and he sent an enormous scorpion to sting Orion. Artemis was a ...
Photometric analysis of the globular cluster NGC5466
... show clearly the position of NGC5466 (Fig. 2). NGC5466 is also one of the least dense known glob- ...
... show clearly the position of NGC5466 (Fig. 2). NGC5466 is also one of the least dense known glob- ...
StarIntro_sb12
... The brightness of a star depends upon the distance and its luminosity. Think it over The star Rigel in Orion is about 60,000 times larger than our sun. Why does our sun appear brighter than Rigel? ...
... The brightness of a star depends upon the distance and its luminosity. Think it over The star Rigel in Orion is about 60,000 times larger than our sun. Why does our sun appear brighter than Rigel? ...
Integrative Studies 410 Our Place in the Universe
... brighter than RR Lyrae, they can be used to measure out to further distances ...
... brighter than RR Lyrae, they can be used to measure out to further distances ...
Part A
... Different parts of the electromagnetic spectrum have different wavelengths and different energies. You can see only a small part of the energy in these wavelengths. ...
... Different parts of the electromagnetic spectrum have different wavelengths and different energies. You can see only a small part of the energy in these wavelengths. ...
Using Photometric Data to Derive an HR Diagram
... plotted vertically, using Microsoft Excel. The photometry was performed using the software Imagine-32 at UCSB. ...
... plotted vertically, using Microsoft Excel. The photometry was performed using the software Imagine-32 at UCSB. ...
Star Evolution
... fusion in their cores. They leave the main sequence and become red giants when the core hydrogen is depleted” ...
... fusion in their cores. They leave the main sequence and become red giants when the core hydrogen is depleted” ...
The Temperature of Stars
... – Stars moving toward Earth are shifted slightly toward blue, which is called blue shift. – Stars moving away from Earth are shifted slightly toward red, which is called red shift. ...
... – Stars moving toward Earth are shifted slightly toward blue, which is called blue shift. – Stars moving away from Earth are shifted slightly toward red, which is called red shift. ...
Chapter10 (with interactive links)
... To measure mass, astronomers look for the effects of gravity. Many stars are binary stars orbiting a common center of mass. A less massive star moves faster on a larger orbit. ...
... To measure mass, astronomers look for the effects of gravity. Many stars are binary stars orbiting a common center of mass. A less massive star moves faster on a larger orbit. ...
File
... Stars are actually classified based on their color, temperature, luminosity, spectral type, and evolutionary stage. ...
... Stars are actually classified based on their color, temperature, luminosity, spectral type, and evolutionary stage. ...
Lecture 10-11 - OSU Astronomy
... classifications represents the hottest stellar surface temperature? ...
... classifications represents the hottest stellar surface temperature? ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2005
... Double Stars/Star Clusters/Nebulae/Galaxies. ...
... Double Stars/Star Clusters/Nebulae/Galaxies. ...
The Hertzsprung-Russell Diagram
... Equal Radius Lines In general the hotter the star is the brighter it will be. Thus you would expect stars of the same size but different temperatures to form a diagonal line called an equal radius line. Equal Radius lines can be added to an H-R diagram ...
... Equal Radius Lines In general the hotter the star is the brighter it will be. Thus you would expect stars of the same size but different temperatures to form a diagonal line called an equal radius line. Equal Radius lines can be added to an H-R diagram ...
Hall Scorpius constellation (11) Jacob Hall Physics 1040, sec 002
... is the same color as the planet Mars. Antares is a red supergiant with a radius about 800 times that of the Sun. It is classified as a variable star; its apparent magnitude varies between 0.9 and 1.8. It has a hot blue companion star about 2.9 arcseconds away. (2) Antares is the 16th brightest star ...
... is the same color as the planet Mars. Antares is a red supergiant with a radius about 800 times that of the Sun. It is classified as a variable star; its apparent magnitude varies between 0.9 and 1.8. It has a hot blue companion star about 2.9 arcseconds away. (2) Antares is the 16th brightest star ...
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 ...
Stars and Nebulae
... galaxies were distant collections of stars, galaxies were also called nebulae because of their fuzzy appearance. Today, we reserve the word nebula for extended objects consisting mostly of gas and dust. Nebulae come in many shapes and sizes, and form in many ways. In some nebulae, stars form out of ...
... galaxies were distant collections of stars, galaxies were also called nebulae because of their fuzzy appearance. Today, we reserve the word nebula for extended objects consisting mostly of gas and dust. Nebulae come in many shapes and sizes, and form in many ways. In some nebulae, stars form out of ...
Lec6
... from the core and power radiated from the surface • Such a star alternately expands and contracts, varying in brightness as it tries to find a balance ...
... from the core and power radiated from the surface • Such a star alternately expands and contracts, varying in brightness as it tries to find a balance ...
Chapter 09 - The Independent School
... parallax, nearby stars also show continuous motions across the sky. ...
... parallax, nearby stars also show continuous motions across the sky. ...
Winter 2014
... Nebula. To the casual observer, this nebula looks like a star due to its great distance, but a telescope will reveal the gas as well as many of the stars forming within. To find the Nebula, look for a line of three dimmer stars below Orion’s Belt, sometimes known as Orion’s Sword. The topmost of the ...
... Nebula. To the casual observer, this nebula looks like a star due to its great distance, but a telescope will reveal the gas as well as many of the stars forming within. To find the Nebula, look for a line of three dimmer stars below Orion’s Belt, sometimes known as Orion’s Sword. The topmost of the ...
astro2_lec1 - Astronomy & Astrophysics Group
... Evolution and the Tuning Fork diagram For many years the prevailing belief was that ellipticals evolve into spirals, from left to right in the tuning fork (although Hubble did not argue for the tuning fork diagram as an evolutionary sequence). ...
... Evolution and the Tuning Fork diagram For many years the prevailing belief was that ellipticals evolve into spirals, from left to right in the tuning fork (although Hubble did not argue for the tuning fork diagram as an evolutionary sequence). ...
Spectroscopy – the study of the colors of light (the spectrum) given
... The width of the spectral line seen in the spectra of stars is determined by the density of the gas producing the light. The densities of these gases is less for a red giant and more for a white dwarf. ...
... The width of the spectral line seen in the spectra of stars is determined by the density of the gas producing the light. The densities of these gases is less for a red giant and more for a white dwarf. ...
Lab 4
... Photometry is the determination and use of the color spectrum of astronomical objects to determine the objects’ properties. Two properties you will investigate later are distance and age. The objects you will use are stars in various clusters in the Milky Way galaxy and beyond. This is known as the ...
... Photometry is the determination and use of the color spectrum of astronomical objects to determine the objects’ properties. Two properties you will investigate later are distance and age. The objects you will use are stars in various clusters in the Milky Way galaxy and beyond. This is known as the ...
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.