Ch 3 Sec 1 Tools of modern astronomy
... 2. Apparent magnitude is how bright it appears from Earth a) Depends on how close it is to Earth b) A flashlight doesn’t change, but will look much brighter to you if it’s in your face than a block away 3. Absolute magnitude is how bright the star would be at a standard distance E. Hertzsprung-Russe ...
... 2. Apparent magnitude is how bright it appears from Earth a) Depends on how close it is to Earth b) A flashlight doesn’t change, but will look much brighter to you if it’s in your face than a block away 3. Absolute magnitude is how bright the star would be at a standard distance E. Hertzsprung-Russe ...
Life and fate of a star
... available hydrogen reservoir. In ● At the end of the red giant phase of the Sun, nuclear fusion reactions another five billion years, the should produce carbon and oxygen atoms from the helium of the core. core of our Sun will run out of Heavier elements only form in more massive stars fuel as its h ...
... available hydrogen reservoir. In ● At the end of the red giant phase of the Sun, nuclear fusion reactions another five billion years, the should produce carbon and oxygen atoms from the helium of the core. core of our Sun will run out of Heavier elements only form in more massive stars fuel as its h ...
Astronomy and Space articles by Martin George of the Launceston
... Kepler's mission is to carefully observe a large number of stars to try to detect the slight drop in light as planets pass in front of their parent stars as seen from here. This particular observation is of a star system called Kepler 16, which is about 200 light years away. By comparison, the neare ...
... Kepler's mission is to carefully observe a large number of stars to try to detect the slight drop in light as planets pass in front of their parent stars as seen from here. This particular observation is of a star system called Kepler 16, which is about 200 light years away. By comparison, the neare ...
Ancient astronomy Part 8
... sacred was the four cardinal directions. Many tribes based their building designs on north, south, east and west. Another general feature was that, unlike other cultures, time was estimated, but not seen as important in itself. There were no formal clocks or calendars. Instead, depending on their lo ...
... sacred was the four cardinal directions. Many tribes based their building designs on north, south, east and west. Another general feature was that, unlike other cultures, time was estimated, but not seen as important in itself. There were no formal clocks or calendars. Instead, depending on their lo ...
Issue 118 - Apr 2014
... Cepheids - Named after Delta Cephei, these luminous stars brighten and fade with clockwork regularity. There are several types of Cepheids ranging from Beta Cepheids with 0.1 magnitude fluctuations and short periods from 3 to 7 hours to W Virginis Stars with fluctuation of about one magnitude over a ...
... Cepheids - Named after Delta Cephei, these luminous stars brighten and fade with clockwork regularity. There are several types of Cepheids ranging from Beta Cepheids with 0.1 magnitude fluctuations and short periods from 3 to 7 hours to W Virginis Stars with fluctuation of about one magnitude over a ...
Document
... Find the last two stars of the bowl and follow the direction in which they point. The star they point to is Polaris, the North Star. When you look at it, you are facing North. Google ‘star chart’. What constellation is the North Star a part of? ...
... Find the last two stars of the bowl and follow the direction in which they point. The star they point to is Polaris, the North Star. When you look at it, you are facing North. Google ‘star chart’. What constellation is the North Star a part of? ...
HR Diagram Lab Handout
... 7. The temperature of the hottest stars is _______________. 8. The color of the hottest stars is ________________. 9. The temperature of the coldest stars is _______________. 10. The color of the coldest stars is ________________. 11. The life expectancy of a very hot star is _______________ years. ...
... 7. The temperature of the hottest stars is _______________. 8. The color of the hottest stars is ________________. 9. The temperature of the coldest stars is _______________. 10. The color of the coldest stars is ________________. 11. The life expectancy of a very hot star is _______________ years. ...
Document
... Pluto first discovered in 1930 by Clyde W. Tombaugh A full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit. Pluto has been demoted to be a “Dwar ...
... Pluto first discovered in 1930 by Clyde W. Tombaugh A full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit. Pluto has been demoted to be a “Dwar ...
astr100_finalexam
... [23] Current evidence indicates the Universe’s expansion ____. A) is speeding up B) is slowing down C) has stopped D) is constant [24] Where are we? A) At the exact center of an expanding Universe, as shown by the universal expansion away from us in all directions. B) Near, although probably not rig ...
... [23] Current evidence indicates the Universe’s expansion ____. A) is speeding up B) is slowing down C) has stopped D) is constant [24] Where are we? A) At the exact center of an expanding Universe, as shown by the universal expansion away from us in all directions. B) Near, although probably not rig ...
Integrative Studies 410 Our Place in the Universe
... horizon at a specific time is changing as the days pass by measuring the length of the shadow it casts with a gnomon (essentially a stick in the ground). • Time: Once you know how to do it, this only takes a ...
... horizon at a specific time is changing as the days pass by measuring the length of the shadow it casts with a gnomon (essentially a stick in the ground). • Time: Once you know how to do it, this only takes a ...
Our Universe
... including heat and light, cannot exist. •These black holes are a million to a billion times more massive than our sun! •Is there a black hole in the center of our Milky Way- YES! •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the ...
... including heat and light, cannot exist. •These black holes are a million to a billion times more massive than our sun! •Is there a black hole in the center of our Milky Way- YES! •The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the ...
bright - TutorPlus
... • Stars can be classified into characteristic types depending on their position on the H-R diagram. • Most stars line up along a slightly curved diagonal line called the main sequence. Our Sun is located on the main sequence. • On the main sequence, low mass stars tend to be cooler and less bright w ...
... • Stars can be classified into characteristic types depending on their position on the H-R diagram. • Most stars line up along a slightly curved diagonal line called the main sequence. Our Sun is located on the main sequence. • On the main sequence, low mass stars tend to be cooler and less bright w ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.