Powerpoint Presentation (large file)
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
Problem Set 2
... ring’s radius in parcsec? Recall from class that the ring’s angular radius is the projected ellipse’s semi-major axis. What is the distance d to the supernova? Finally, at its brightest, SN1987A had an apparent magnitude of mV ≈ 3 mag. What was its peak absolute magnitude? Given that the Sun has an ...
... ring’s radius in parcsec? Recall from class that the ring’s angular radius is the projected ellipse’s semi-major axis. What is the distance d to the supernova? Finally, at its brightest, SN1987A had an apparent magnitude of mV ≈ 3 mag. What was its peak absolute magnitude? Given that the Sun has an ...
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 ...
Astronomy PPT
... With only their eyes to aid them, astronomers created a system to classify stars based upon their brightness. ...
... With only their eyes to aid them, astronomers created a system to classify stars based upon their brightness. ...
Lecture10
... temperature? The surface temperature of the Sun is 5800K. A.7220 K B.6650 K C.4660 K D.3610 K ...
... temperature? The surface temperature of the Sun is 5800K. A.7220 K B.6650 K C.4660 K D.3610 K ...
The Dramatic Lives of Stars
... B. Grows and cools as it ages C. Shrinks and heats up as it ages D. Shrinks and cools as it ages ...
... B. Grows and cools as it ages C. Shrinks and heats up as it ages D. Shrinks and cools as it ages ...
Virtual Sky II (Rev 10/11)
... Give the two dates when the Sun is at the position where the path crosses itself. ___________ _________________ ...
... Give the two dates when the Sun is at the position where the path crosses itself. ___________ _________________ ...
O star
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
I CAN SEE THE STARS IN YOUR EYES
... Your space craft begins to travel at the speed of light, taking you towards the sun. Traveling at this speed, the trip from Earth to the sun, a distance of 93 million miles, would take about 8 minutes, not very long for such a long trip! Yet, to get to the next closest star, Proxima Centauri, would ...
... Your space craft begins to travel at the speed of light, taking you towards the sun. Traveling at this speed, the trip from Earth to the sun, a distance of 93 million miles, would take about 8 minutes, not very long for such a long trip! Yet, to get to the next closest star, Proxima Centauri, would ...
Lecture 5: Stars
... When classifying stars the star is given one of the OBAFGKM spectral classifications. Within this a number 0-9 says how hot it is, so an M0 is hotter than an M9 (the coolest type of star). The Sun is a G2 star (at the hot-end of the Gs). Roman numerals are used to distinguish sizes as determined by ...
... When classifying stars the star is given one of the OBAFGKM spectral classifications. Within this a number 0-9 says how hot it is, so an M0 is hotter than an M9 (the coolest type of star). The Sun is a G2 star (at the hot-end of the Gs). Roman numerals are used to distinguish sizes as determined by ...
Nov - Wadhurst Astronomical Society
... Aries and continue it until you reach a faint parallelogram of stars that makes up the whale’s head. Brian provided the meeting with handouts to cover this talk and in this he mentioned a number of objects of interest to be found in the region. Mira otherwise known as Omicron Ceti, was one of the fi ...
... Aries and continue it until you reach a faint parallelogram of stars that makes up the whale’s head. Brian provided the meeting with handouts to cover this talk and in this he mentioned a number of objects of interest to be found in the region. Mira otherwise known as Omicron Ceti, was one of the fi ...
Chapter 27.1
... Other differences include composition, temperature, brightness, and distance from earth. ...
... Other differences include composition, temperature, brightness, and distance from earth. ...
Stars and Light
... • The magnitude of a star gives it brightness or flux when observed from Earth. • To talk about the properties of star, independent of how far they happen to be from Earth, we use “absolute magnitude”. • Absolute magnitude is the magnitude that a star would have viewed from a distance of 10 parsecs. ...
... • The magnitude of a star gives it brightness or flux when observed from Earth. • To talk about the properties of star, independent of how far they happen to be from Earth, we use “absolute magnitude”. • Absolute magnitude is the magnitude that a star would have viewed from a distance of 10 parsecs. ...
Circumpolar constellations
... example, an observer at the equator (with a latitude = 0°) would observe Polaris due north at a point on the horizon, and all the stars would rise in the East, and set in the West — none would be circumpolar. Observers at higher latitudes also see Polaris higher in the northern sky, and will see mor ...
... example, an observer at the equator (with a latitude = 0°) would observe Polaris due north at a point on the horizon, and all the stars would rise in the East, and set in the West — none would be circumpolar. Observers at higher latitudes also see Polaris higher in the northern sky, and will see mor ...
The Hertzsprung-Russell Diagram
... Most stars lie in the main sequence because if a star is hotter it is brighter. Thus you would expect stars of the same size but different temperatures to form a diagonal line since “hotter means brighter” That Main-Sequence is steeper than a ‘same-size diagonal” shows that larger mass ‘normal’ star ...
... Most stars lie in the main sequence because if a star is hotter it is brighter. Thus you would expect stars of the same size but different temperatures to form a diagonal line since “hotter means brighter” That Main-Sequence is steeper than a ‘same-size diagonal” shows that larger mass ‘normal’ star ...
Citizen Sky Epsilon Aurigae Script for Fulldome Planetariums
... Not far in the sky from Perseus, we have another character from Greek mythology: Auriga, the Charioteer. The fifth brightest star in the Charioteer is called Epsilon Aurigae. Every 27 years, it drops in brightness and mysteriously dims for nearly two years. Let’s replace our classical view of the c ...
... Not far in the sky from Perseus, we have another character from Greek mythology: Auriga, the Charioteer. The fifth brightest star in the Charioteer is called Epsilon Aurigae. Every 27 years, it drops in brightness and mysteriously dims for nearly two years. Let’s replace our classical view of the c ...
Branches of Earth Science Tools Used to Study Stars Constellations
... Atmosphere: The envelope of gases that surround the Earth as well as space and stars . ...
... Atmosphere: The envelope of gases that surround the Earth as well as space and stars . ...
Word
... What is the total range in absolute magnitude and also in brightness? Using your knowledge of magnitudes, describe why a star with color index of B-V=1.5 would appear red to the human eye. [HINT: In the above Wiki article you’ll read that “B” stands for blue visual magnitude and “V” stands for yello ...
... What is the total range in absolute magnitude and also in brightness? Using your knowledge of magnitudes, describe why a star with color index of B-V=1.5 would appear red to the human eye. [HINT: In the above Wiki article you’ll read that “B” stands for blue visual magnitude and “V” stands for yello ...
Astronomical Ideas Fall 2012 Homework 4 Solutions 1. Two stars
... Convert the white dwarf radius into meters: 104 km = 107 m, and plug numbers into the above equation. 106 K: L ~ 7 * 1031 W. The Sunʼs luminosity is ~4 * 1026 , so this hot white dwarf is about 100,000 times the luminosity of the Sun. 104 K: L ~ 7 * 1024 W. The Sunʼs luminosity is ~4 * 1026 , so thi ...
... Convert the white dwarf radius into meters: 104 km = 107 m, and plug numbers into the above equation. 106 K: L ~ 7 * 1031 W. The Sunʼs luminosity is ~4 * 1026 , so this hot white dwarf is about 100,000 times the luminosity of the Sun. 104 K: L ~ 7 * 1024 W. The Sunʼs luminosity is ~4 * 1026 , so thi ...
File
... called the plane of the ecliptic (or just the ecliptic). The zodiac is the group (or “belt”) of constellations that fall along the plane of the ecliptic. It is through these constellations that our Sun appears to “pass” during the year. While there are 12 astrological constellations of the zodiac, t ...
... called the plane of the ecliptic (or just the ecliptic). The zodiac is the group (or “belt”) of constellations that fall along the plane of the ecliptic. It is through these constellations that our Sun appears to “pass” during the year. While there are 12 astrological constellations of the zodiac, t ...
File - Awakening in Grade 6
... called the plane of the ecliptic (or just the ecliptic). The zodiac is the group (or “belt”) of constellations that fall along the plane of the ecliptic. It is through these constellations that our Sun appears to “pass” during the year. While there are 12 astrological constellations of the zodiac, t ...
... called the plane of the ecliptic (or just the ecliptic). The zodiac is the group (or “belt”) of constellations that fall along the plane of the ecliptic. It is through these constellations that our Sun appears to “pass” during the year. While there are 12 astrological constellations of the zodiac, t ...
Lecture 5
... Mass-Luminosity Relation for MainSequence Stars • Main sequence stars are stars like the Sun but with different masses • The mass-luminosity relation expresses a direct correlation between mass and luminosity for main-sequence stars • The greater the mass of a main-sequence star, the greater its lu ...
... Mass-Luminosity Relation for MainSequence Stars • Main sequence stars are stars like the Sun but with different masses • The mass-luminosity relation expresses a direct correlation between mass and luminosity for main-sequence stars • The greater the mass of a main-sequence star, the greater its lu ...
E3 – Stellar distances
... • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known ...
... • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known ...
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.