Activity 4
... In this equation, m is the apparent magnitude and M is the absolute magnitude. Apparent magnitude can be easily measured from a CCD image, but absolute magnitude takes some work. Cepheid variables ...
... In this equation, m is the apparent magnitude and M is the absolute magnitude. Apparent magnitude can be easily measured from a CCD image, but absolute magnitude takes some work. Cepheid variables ...
Stargazing
... butsomedon’tknowthatit’sactuallyaclusterofthreestars—AlphaCentauriA, AlphaCentauriBandProximaCentauri.ProximaCentauriis4.24lightͲyearsaway andclosesttooursun.Alightyearisthedistancethatlighttravelsinoneyear. We use this measurement because light is t ...
... butsomedon’tknowthatit’sactuallyaclusterofthreestars—AlphaCentauriA, AlphaCentauriBandProximaCentauri.ProximaCentauriis4.24lightͲyearsaway andclosesttooursun.Alightyearisthedistancethatlighttravelsinoneyear. We use this measurement because light is t ...
Classification_of_Stars_By_Luminosity
... He called the brightest stars in the sky first magnitude and the dimmest visible to the naked eye sixth magnitude. Stars of intermediate brightness were given intermediate values. ...
... He called the brightest stars in the sky first magnitude and the dimmest visible to the naked eye sixth magnitude. Stars of intermediate brightness were given intermediate values. ...
The Magnitude Scale
... visible from "dark" rural areas located some 140 miles (200 km) from major cities and some 30 miles (50 km) from nearest town of population 5000 or so ...
... visible from "dark" rural areas located some 140 miles (200 km) from major cities and some 30 miles (50 km) from nearest town of population 5000 or so ...
16. Properties of Stars
... The largest stars are in the upper right corner of the HR Diagram. Note that Absolute Magnitude is a measure of the Luminosity of the Star Apparent visual Magnitude is a measure of the Apparent Brightness (or Intensity) of the starlight reaching the observer. ...
... The largest stars are in the upper right corner of the HR Diagram. Note that Absolute Magnitude is a measure of the Luminosity of the Star Apparent visual Magnitude is a measure of the Apparent Brightness (or Intensity) of the starlight reaching the observer. ...
AST101_lect_12
... Examples: Rigel, in Orion, and Spica, in Virgo. • A: Temperatures from 8000-10,000K. They appear white. Strong absorption lines of hydrogen. Examples: Vega, Altair, Sirius. • F: slightly hotter than the Sun. Absorption lines of metals appear. Procyon is an F star. • G: temperatures between 5000 and ...
... Examples: Rigel, in Orion, and Spica, in Virgo. • A: Temperatures from 8000-10,000K. They appear white. Strong absorption lines of hydrogen. Examples: Vega, Altair, Sirius. • F: slightly hotter than the Sun. Absorption lines of metals appear. Procyon is an F star. • G: temperatures between 5000 and ...
Mar 2017 - What`s Out Tonight?
... Globular Clusters look like fuzzy balls because they contain all night and always outshines any star. Everyone enjoys its 4 tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky ...
... Globular Clusters look like fuzzy balls because they contain all night and always outshines any star. Everyone enjoys its 4 tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky ...
Celestial Motions - Stony Brook Astronomy
... appear to circle from east to west [counterclockwise facing North clockwise facing South] Star Motion on http://astro.unl.edu/naap/motion2/starpaths.html ...
... appear to circle from east to west [counterclockwise facing North clockwise facing South] Star Motion on http://astro.unl.edu/naap/motion2/starpaths.html ...
ASTR 105 Intro Astronomy: The Solar System
... • Zenith: The point directly overhead • Horizon: All points 90° away from zenith • Meridian: Line passing through zenith and connecting N and S points on horizon • Objects are always highest when crossing the meridian ...
... • Zenith: The point directly overhead • Horizon: All points 90° away from zenith • Meridian: Line passing through zenith and connecting N and S points on horizon • Objects are always highest when crossing the meridian ...
Antares - Emmi
... Antares is in the constellation scorpio The Scorpio constellations story is an ancient Greek myth. Orion the hunter was the best hunter in the world and the most handsome man. He bragged that he would kill every animal on Earth. Apollo guardian of the cows pleaded with Hera the queen of the gods t ...
... Antares is in the constellation scorpio The Scorpio constellations story is an ancient Greek myth. Orion the hunter was the best hunter in the world and the most handsome man. He bragged that he would kill every animal on Earth. Apollo guardian of the cows pleaded with Hera the queen of the gods t ...
read in advance to speed your work
... seen when we look in the direction of the constellation of Orion. Begin making an H-R diagram for the stars in Orion (Table II). Plot the MV values (MV again is simply absolute magnitude, M, with the subscript indicating that the magnitude is measured in the visual part of the spectrum) against the ...
... seen when we look in the direction of the constellation of Orion. Begin making an H-R diagram for the stars in Orion (Table II). Plot the MV values (MV again is simply absolute magnitude, M, with the subscript indicating that the magnitude is measured in the visual part of the spectrum) against the ...
Star - Uplift Education
... Cepheid variables are stars with regular variation in absolute magnitude (luminosity) (rapid brightening, gradual dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces wit ...
... Cepheid variables are stars with regular variation in absolute magnitude (luminosity) (rapid brightening, gradual dimming) which is caused by periodic expansion and contraction of outer surface (brighter as it expands). This is to do with the balance between the nuclear and gravitational forces wit ...
The Argonauts, background to the constellation Carina Argo Navis
... through Carina, there are also a large number of open clusters in the constellation. These include the "Southern Pleiades." The most notable object in Carina is Homunculus Nebula (from the Latin meaning Little Man), a planetary nebula visible to the naked eye believed to have been ejected in an enor ...
... through Carina, there are also a large number of open clusters in the constellation. These include the "Southern Pleiades." The most notable object in Carina is Homunculus Nebula (from the Latin meaning Little Man), a planetary nebula visible to the naked eye believed to have been ejected in an enor ...
The Celestial sphere
... observed by man in the stars. These also appear to be on the celestial sphere. 1. The stars in a constellation are in the same general direction 2. The stars in a constellation are NOT the same distance from earth ...
... observed by man in the stars. These also appear to be on the celestial sphere. 1. The stars in a constellation are in the same general direction 2. The stars in a constellation are NOT the same distance from earth ...
20 Stars/Distances/Magnitudes
... • A whole range of sizes • A whole range of masses • A whole range of temperatures • Large fraction in binaries (2 stars orbiting each other) • Some are “close” and some are really, really, really, etc far ...
... • A whole range of sizes • A whole range of masses • A whole range of temperatures • Large fraction in binaries (2 stars orbiting each other) • Some are “close” and some are really, really, really, etc far ...
Orion- The Swordsman of the Sky - A Winter Constellation from the
... which require magnification to see them, such as the Horse Head Nebula. You have to imagine, and possibly take your finger to join the dots, but you can virtually see the shoulders of Orion. The left shoulder star (seen from our vantage point) is Betelgeuse. This is a red super giant star, which als ...
... which require magnification to see them, such as the Horse Head Nebula. You have to imagine, and possibly take your finger to join the dots, but you can virtually see the shoulders of Orion. The left shoulder star (seen from our vantage point) is Betelgeuse. This is a red super giant star, which als ...
1” “Sky-Notes” of the Open University Astronomy Club. September
... "Filament" NGC6960 is located by the star 52 Cygni which should be identified first. Then sweep eastwards to locate the slightly brighter "Veil" NGC 6992-95. The central "wedge" NGC 6979 is rather faint but patience will reap rewards. Once the "Veil" and "Filament" have been recognized identificatio ...
... "Filament" NGC6960 is located by the star 52 Cygni which should be identified first. Then sweep eastwards to locate the slightly brighter "Veil" NGC 6992-95. The central "wedge" NGC 6979 is rather faint but patience will reap rewards. Once the "Veil" and "Filament" have been recognized identificatio ...
Document
... the same time. • The cluster is as old as the most luminous (massive) star left on the MS. • All MS stars to the left have already used up their H fuel and are gone. • The position of the hottest, brightest star on a cluster’s main sequence is called the main sequence turnoff point. ...
... the same time. • The cluster is as old as the most luminous (massive) star left on the MS. • All MS stars to the left have already used up their H fuel and are gone. • The position of the hottest, brightest star on a cluster’s main sequence is called the main sequence turnoff point. ...
Physics 1025: Lecture 18 Stellar Magnitudes, Absolute Magnitudes
... brighter than red. For example among the brighter stars, Rigel is blue and Betelgeuse is red—which is brighter? Thirdly, the eye cannot integrate add up light – it either sees a dim object or not; it is an instantaneous detector. Eye estimates of brightness are called visual magnitudes, mv It is bet ...
... brighter than red. For example among the brighter stars, Rigel is blue and Betelgeuse is red—which is brighter? Thirdly, the eye cannot integrate add up light – it either sees a dim object or not; it is an instantaneous detector. Eye estimates of brightness are called visual magnitudes, mv It is bet ...
EM review
... Measuring the brightness of stars (and NEAS) The observed brightness of a star is given by its apparent magnitude. (First devised by Hipparchus who made a catalogue of about 850) The brightest stars: m=1. Dimmest stars (visible to the naked eye) m=6. The magnitude scale has been shown to be loga ...
... Measuring the brightness of stars (and NEAS) The observed brightness of a star is given by its apparent magnitude. (First devised by Hipparchus who made a catalogue of about 850) The brightest stars: m=1. Dimmest stars (visible to the naked eye) m=6. The magnitude scale has been shown to be loga ...
Phobos
... the middle of the night and is highest in the south at dawn. Mercury reaches greatest elongation in the morning sky this month, but is better viewed from the southern hemisphere. Dates & Time: Thursday 1st March is the 60th day of the year and it is also number 2454160 in the Julian Calendar. The Su ...
... the middle of the night and is highest in the south at dawn. Mercury reaches greatest elongation in the morning sky this month, but is better viewed from the southern hemisphere. Dates & Time: Thursday 1st March is the 60th day of the year and it is also number 2454160 in the Julian Calendar. The Su ...
Bright stars and faint stars: the stellar magnitude system Magnitudes
... • System due to Hipparchos (2nd century BC) • Nowadays system made more precise • Magnitude changes are “logarithmic”, each magnitude means factor of 2.512 in brightness • See Table 16.2 (p382) ...
... • System due to Hipparchos (2nd century BC) • Nowadays system made more precise • Magnitude changes are “logarithmic”, each magnitude means factor of 2.512 in brightness • See Table 16.2 (p382) ...
The HR Diagram (PowerPoint version)
... (You may need to ‘hide the horizon’). Zoom in until the field of view is about 100 degrees across. Here’s a first question: if I plot the apparent brightness of the visible stars against their spectral types, what will I see? To do so, go to the drop-down menu shown: under ‘Display Options’ and ‘Sta ...
... (You may need to ‘hide the horizon’). Zoom in until the field of view is about 100 degrees across. Here’s a first question: if I plot the apparent brightness of the visible stars against their spectral types, what will I see? To do so, go to the drop-down menu shown: under ‘Display Options’ and ‘Sta ...
Crux
Crux /ˈkrʌks/, located in the deep southern sky, is the smallest yet one of the most distinctive of the 88 modern constellations. Its name is Latin for cross, and it is dominated by a cross-shaped asterism that is commonly known as the Southern Cross. Although visible to the Ancient Greeks, it was seen as part of the constellation Centaurus, and not defined or accurately mapped till the 16th century.Known as Acrux, blue-white Alpha Crucis is the constellation's brightest star and the bottom star of the cross. Nearly as bright are Beta and Gamma, while Delta and Epsilon make up the asterism. Many of the constellation's brighter stars are members of the Scorpius–Centaurus Association, a loose group of hot blue-white stars that appear to share a common origin and motion across the Milky Way. Two star systems have been found to have planets. The constellation also contains four Cepheid variables visible to the naked eye under optimum conditions. Crux also contains the Jewel Box, a bright open cluster, and the Coalsack Nebula, the most prominent dark nebula in the sky.