Where is the Sun in the Milk Way?
... – Wien’s law: the wavelength λmax, at which the Bλ is at its maximum, varies inversely with temperature ...
... – Wien’s law: the wavelength λmax, at which the Bλ is at its maximum, varies inversely with temperature ...
The Life Cycle of a Star
... The core is now very dense and very hot. (A tablespoon full would weigh 5 tons!) A white dwarf is about 8,000 miles in diameter. After 35,000 years, the core begins to cool. ...
... The core is now very dense and very hot. (A tablespoon full would weigh 5 tons!) A white dwarf is about 8,000 miles in diameter. After 35,000 years, the core begins to cool. ...
constellations
... (clock), Norma (set-square), etc. There are 88 modern constellations, as recognised by the International Astronomical Union. (Other cultures had their own distinct constellations, e.g. Chinese, Indian, Polynesian, Viking, etc.) ...
... (clock), Norma (set-square), etc. There are 88 modern constellations, as recognised by the International Astronomical Union. (Other cultures had their own distinct constellations, e.g. Chinese, Indian, Polynesian, Viking, etc.) ...
Today`s Class: Measuring temperatures of stars Astronomer`s
... • Important: the different spectral lines seen are NOT primarily because stars are made of different elements ...
... • Important: the different spectral lines seen are NOT primarily because stars are made of different elements ...
Spectra of stars
... Within each spectral class some stars will be larger and therefore brighter than others. The larger stars will generally have narrower spectral lines because of the reduced pressures in their outer atmosphere. (See later in the section on the broadening of spectral lines) These extra classifications ...
... Within each spectral class some stars will be larger and therefore brighter than others. The larger stars will generally have narrower spectral lines because of the reduced pressures in their outer atmosphere. (See later in the section on the broadening of spectral lines) These extra classifications ...
The Hertzsprung-Russell Diagram
... you know the stars are all at the same distance. Then apparent brightness vs spectral type is basically the same as luminosity vs temperature. They found that stars only appear in certain parts of the diagram. ...
... you know the stars are all at the same distance. Then apparent brightness vs spectral type is basically the same as luminosity vs temperature. They found that stars only appear in certain parts of the diagram. ...
Astronomy 12 - Charting the Sky
... 1. Name 5 celestial objects or collection of celestial objects that have been discussed in class. Order these objects from smallest to largest. ...
... 1. Name 5 celestial objects or collection of celestial objects that have been discussed in class. Order these objects from smallest to largest. ...
The Magnitude Scale
... from a given source (energy per unit area per unit time per unit bandwidth), then the apparent magnitude of the object is defined by Fν m = −2.5 log10 0 Fν where Fν is the flux per unit frequency received from the source, and F ν0 is a normalising constant. The normalising constants have been calibr ...
... from a given source (energy per unit area per unit time per unit bandwidth), then the apparent magnitude of the object is defined by Fν m = −2.5 log10 0 Fν where Fν is the flux per unit frequency received from the source, and F ν0 is a normalising constant. The normalising constants have been calibr ...
Day 1212
... temperature increases. • When interior temperatures reach 1 million K the center is called a protostar. • When the temperature reaches 10 million K hydrogen fuses to create helium = star! ...
... temperature increases. • When interior temperatures reach 1 million K the center is called a protostar. • When the temperature reaches 10 million K hydrogen fuses to create helium = star! ...
What is a star? A star is a giant ball of gases held together by gravity
... The star nearest to Earth is our sun. It is the center of our solar system. Its gravity causes the planets to orbit around it and holds them in place. The sun rotates on its axis just like the planets do. It takes about 25 days to rotate. About two-thirds of the sun is hydrogen and one-third helium. ...
... The star nearest to Earth is our sun. It is the center of our solar system. Its gravity causes the planets to orbit around it and holds them in place. The sun rotates on its axis just like the planets do. It takes about 25 days to rotate. About two-thirds of the sun is hydrogen and one-third helium. ...
observingnebulaeclusters-1
... the stars in a given cluster formed simultaneously from the same parent cloud of gas and dust. When comparing star clusters, we oftennote the density of stars, their age and their chemical composition (as revealed by their spectra ). ...
... the stars in a given cluster formed simultaneously from the same parent cloud of gas and dust. When comparing star clusters, we oftennote the density of stars, their age and their chemical composition (as revealed by their spectra ). ...
Lecture16
... brightness of stars. If we knew their distance, we could find their luminosity. We can measure the distance to stars with ...
... brightness of stars. If we knew their distance, we could find their luminosity. We can measure the distance to stars with ...
Exercise 7
... Introduction: By looking at an apparently flat background of stars at night or at a star chart printed on a page, we often forget about the three-dimensional nature of the universe. In this exercise, you will construct (with welding rods and Styrofoam balls) a model of nearby space including many of ...
... Introduction: By looking at an apparently flat background of stars at night or at a star chart printed on a page, we often forget about the three-dimensional nature of the universe. In this exercise, you will construct (with welding rods and Styrofoam balls) a model of nearby space including many of ...
The Evolution of Stars - hrsbstaff.ednet.ns.ca
... the natural phenomenon by which all objects with mass attract other objects. Without gravity the universe would be a very different place. ...
... the natural phenomenon by which all objects with mass attract other objects. Without gravity the universe would be a very different place. ...
Star Life Cycle Review 1. What is the first stage of star creation? A
... A star undergoes many different stages during its life. And after it dies, the material that made it up can be used by future stars. ...
... A star undergoes many different stages during its life. And after it dies, the material that made it up can be used by future stars. ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.