Slides from Lecture04
... extending it to much fainter objects (that are visible through telescopes but were not bright enough to be seen by Greek astronomers). • The Sun can also be put on this “magnitude” system. ...
... extending it to much fainter objects (that are visible through telescopes but were not bright enough to be seen by Greek astronomers). • The Sun can also be put on this “magnitude” system. ...
Part 1
... atop one another so the background stars (circles) line up. There are two nearby stars also shown. Which of these nearby stars is closer? ...
... atop one another so the background stars (circles) line up. There are two nearby stars also shown. Which of these nearby stars is closer? ...
stars and beyond - Math/Science Nucleus
... A celestial globe shows the complete northern and southern hemispheres and the main stars of each hemisphere. It is divided into 88 regions called constellations. The purple band that runs around the globe is the Milky Way Galaxy. The dotted line within this band is the galactic equator. There is a ...
... A celestial globe shows the complete northern and southern hemispheres and the main stars of each hemisphere. It is divided into 88 regions called constellations. The purple band that runs around the globe is the Milky Way Galaxy. The dotted line within this band is the galactic equator. There is a ...
upperMS - CWRU Astronomy
... lifetime If 40% of the remaining mass can be removed in the final 85% of the lifetime, then it’s a nitrogen rich star It’s ok to lose this much mass and still be OB, but if it loses much more, then its luminosity will be too low Often present in young clusters ...
... lifetime If 40% of the remaining mass can be removed in the final 85% of the lifetime, then it’s a nitrogen rich star It’s ok to lose this much mass and still be OB, but if it loses much more, then its luminosity will be too low Often present in young clusters ...
Basic properties of stars
... This is data for NGC 2482. It is about 400 million years old. Stars considerably right of the main sequence are more distant giants. ...
... This is data for NGC 2482. It is about 400 million years old. Stars considerably right of the main sequence are more distant giants. ...
Lecture 12
... – Allows for easy comparison of sources with immense ranges in flux density. – The magnitude system, let’s be honest, is not readily intuitive. ...
... – Allows for easy comparison of sources with immense ranges in flux density. – The magnitude system, let’s be honest, is not readily intuitive. ...
Science Olympiad 2008 Reach for the Stars Division B
... 69. What type of Object is this DSO (refer to the above table of letters): 70, 71. Of the planets visible today and tonight, are any of them in any of these 8 constellations? If so, list the planet and the constellation it is in. ...
... 69. What type of Object is this DSO (refer to the above table of letters): 70, 71. Of the planets visible today and tonight, are any of them in any of these 8 constellations? If so, list the planet and the constellation it is in. ...
Some Facts and Hypotheses regard
... large and variable ranging up to 500 miles a second. It has been conjectured, that in the case of Eta Argus, two large bodies may have passed very near eaoh other and thus produced great tidal disturbances, oausing immense eruptions corresponding to solar prominencies, only on a vastly larger scale. ...
... large and variable ranging up to 500 miles a second. It has been conjectured, that in the case of Eta Argus, two large bodies may have passed very near eaoh other and thus produced great tidal disturbances, oausing immense eruptions corresponding to solar prominencies, only on a vastly larger scale. ...
Packet 3
... 12. How come when you go outside on an October night you see different stars than on an April night? 13. The Earth moves in 2 different ways thus the, 2 apparent motions of stars are caused by the earth’s R________________________ & R_________________________. 15. Describe blue shift: 14. The 3 actu ...
... 12. How come when you go outside on an October night you see different stars than on an April night? 13. The Earth moves in 2 different ways thus the, 2 apparent motions of stars are caused by the earth’s R________________________ & R_________________________. 15. Describe blue shift: 14. The 3 actu ...
Stars Of Orion Essay Research Paper 01
... relative size, position and colour of the stars. Studying the colour of stars allows us to determining its temperature, which in turn is related to it’s mass. Temperature determines a star’s colour. Red stars are cooler, around 3,000 kelvins (K), while blue stars are hotter and can have temperatures ...
... relative size, position and colour of the stars. Studying the colour of stars allows us to determining its temperature, which in turn is related to it’s mass. Temperature determines a star’s colour. Red stars are cooler, around 3,000 kelvins (K), while blue stars are hotter and can have temperatures ...
Astronomy Activity: The Life-Line of the Stars
... The brightness that a star has as seen from the Earth is called the apparent brightness . Stars which are very bright are called magnitude 1 stars . The next brightest are magnitude 2 stars. Then comes magnitude 3, 4, 5, and down to the very faintest stars visible with the naked eye, magnitude 6 sta ...
... The brightness that a star has as seen from the Earth is called the apparent brightness . Stars which are very bright are called magnitude 1 stars . The next brightest are magnitude 2 stars. Then comes magnitude 3, 4, 5, and down to the very faintest stars visible with the naked eye, magnitude 6 sta ...
Distance, Size, and Temperature of a Star
... after billions and maybe even trillions of years, it will stop glowing and at that point, it will be what we call a black dwarf star. There are still no black dwarf stars in the Universe. Blue Giant Stars: Because blue stars are large, and compact, they burn their fuel quickly, which gives them a v ...
... after billions and maybe even trillions of years, it will stop glowing and at that point, it will be what we call a black dwarf star. There are still no black dwarf stars in the Universe. Blue Giant Stars: Because blue stars are large, and compact, they burn their fuel quickly, which gives them a v ...
Andromeda Check-List - Norman Lockyer Observatory
... Not very impressive but some observers report seeing asterisms within the cluster. The most popular is either a trapezium or the letter “g”. Look for a line of around 15 stars. Some observers report seeing a strong bluish tint to the stars. NGC7380 – Open Cluster - I 1 m – Easy Easily viewed through ...
... Not very impressive but some observers report seeing asterisms within the cluster. The most popular is either a trapezium or the letter “g”. Look for a line of around 15 stars. Some observers report seeing a strong bluish tint to the stars. NGC7380 – Open Cluster - I 1 m – Easy Easily viewed through ...
Globular Clusters - Lick Observatory
... We can find the distance to our cluster. d= distance [in parsecs] M=absolute magnitude [the actual brightness] m=apparent [how bright the star appears to us] Ar=Extinction [amount of dust in-between us and our cluster] ...
... We can find the distance to our cluster. d= distance [in parsecs] M=absolute magnitude [the actual brightness] m=apparent [how bright the star appears to us] Ar=Extinction [amount of dust in-between us and our cluster] ...
The colour-magnitude diagram
... Different effective temperatures correspond to: • different spectral types • different colours ...
... Different effective temperatures correspond to: • different spectral types • different colours ...
S T A R S
... about 68 light years away. Aldebaran is one of the few first magnitude stars that may be occulted by the moon. The disappearance of the star is startlingly abrupt, particularly so at the moons dark edge. The V shaped central group is the Hyades star cluster group and represents the bull’s head – Ald ...
... about 68 light years away. Aldebaran is one of the few first magnitude stars that may be occulted by the moon. The disappearance of the star is startlingly abrupt, particularly so at the moons dark edge. The V shaped central group is the Hyades star cluster group and represents the bull’s head – Ald ...
January 2015 - Newbury Astronomical Society
... The chart above shows the night sky looking south at about 21:00 on 15th January. West is to the right and east to the left. The curved line across the sky is the ecliptic. This is the imaginary line along which the Sun, Moon and planets appear to move across the sky. The constellations through whic ...
... The chart above shows the night sky looking south at about 21:00 on 15th January. West is to the right and east to the left. The curved line across the sky is the ecliptic. This is the imaginary line along which the Sun, Moon and planets appear to move across the sky. The constellations through whic ...
Lecture 10: The Hertzsprung
... There is a mass-luminosity relation on the main sequence. We can use that + a sample of stars where we get all the stars within a certain distance of the Sun to figure out how many stars of what masses are out there. Answer: Lots of low-mass stars! Very few high-mass stars. This is something our the ...
... There is a mass-luminosity relation on the main sequence. We can use that + a sample of stars where we get all the stars within a certain distance of the Sun to figure out how many stars of what masses are out there. Answer: Lots of low-mass stars! Very few high-mass stars. This is something our the ...
Surveying the Stars
... parallax angle… • The basic idea: Closer objects shift in direction through a bigger angle than do farther ones • Simple geometry (see next slide) gives the formula… • Distance (in pc) = 1/(parallax angle (in arcsec)) • Must use the right units here: define a new distance unit, for convenience… a pa ...
... parallax angle… • The basic idea: Closer objects shift in direction through a bigger angle than do farther ones • Simple geometry (see next slide) gives the formula… • Distance (in pc) = 1/(parallax angle (in arcsec)) • Must use the right units here: define a new distance unit, for convenience… a pa ...
Events: - Temecula Valley Astronomers
... As the sun sets, I try to point out the first stars visible - usually the summer triangle. I talk about constellations and asterisms. Once the sky is dark, our first targets are man-made satellites. Many web sites and cell phone apps help you find what is visible. While we are waiting for them to co ...
... As the sun sets, I try to point out the first stars visible - usually the summer triangle. I talk about constellations and asterisms. Once the sky is dark, our first targets are man-made satellites. Many web sites and cell phone apps help you find what is visible. While we are waiting for them to co ...
Constellation
... do not represent real groupings of stars, astronomers still find them useful for naming stars and mapping the sky. Astronomers use letters of the Greek alphabet to name stars. They also use a form of the name of the constellation the star is in. The brightest star in a constellation has alpha in its ...
... do not represent real groupings of stars, astronomers still find them useful for naming stars and mapping the sky. Astronomers use letters of the Greek alphabet to name stars. They also use a form of the name of the constellation the star is in. The brightest star in a constellation has alpha in its ...
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.