Stars are made of very hot gas. This gas is mostly hydrogen and
... Like a light house, they shine across a great distance. Even though blue giant stars are rare, they make up many of the stars we see at night Blue giant stars die in a spectacular way They grow larger just like the Sun sized stars, but then instead of shrinking and forming a planetary nebula they ex ...
... Like a light house, they shine across a great distance. Even though blue giant stars are rare, they make up many of the stars we see at night Blue giant stars die in a spectacular way They grow larger just like the Sun sized stars, but then instead of shrinking and forming a planetary nebula they ex ...
Great Astronomers of the 20th Century
... distances to galaxies – Picks up where Period-Luminosity relationship runs out of steam – Luminosity of galaxy is correlated to the width of its spectral absorption lines – Velocity dispersion of the inner few kiloparsecs of a galaxy ...
... distances to galaxies – Picks up where Period-Luminosity relationship runs out of steam – Luminosity of galaxy is correlated to the width of its spectral absorption lines – Velocity dispersion of the inner few kiloparsecs of a galaxy ...
1b91: answers to problem sheet no 1
... First two were revolutionary because they showed that heavenly bodies were not pure or perfect – third must also show this to some extent. Last three supported revolutionary view that the Earth and the other planets must orbit the Sun. Marks – total 8 (1 for each discovery and 1 for showing why it w ...
... First two were revolutionary because they showed that heavenly bodies were not pure or perfect – third must also show this to some extent. Last three supported revolutionary view that the Earth and the other planets must orbit the Sun. Marks – total 8 (1 for each discovery and 1 for showing why it w ...
Naked Eye, Binocular, or Small Backyard Telescope Night Sky
... Basic Scientific Content Information about what you can see in the night sky with your naked eye, binoculars, or a small telescope: 1.) The Moon – The Moon is the only natural satelli ...
... Basic Scientific Content Information about what you can see in the night sky with your naked eye, binoculars, or a small telescope: 1.) The Moon – The Moon is the only natural satelli ...
HR Diagram
... 6. Then select File>Load Plot>Select Cluster Data. Start with the intermediate age NGC 752. Double click to load graph. Under tools choose Zero Age Main Sequence. Adjust the V-Mv scroll bar to get the best fit between the ZAMS (green line) and the data. The older the cluster the fewer the stars left ...
... 6. Then select File>Load Plot>Select Cluster Data. Start with the intermediate age NGC 752. Double click to load graph. Under tools choose Zero Age Main Sequence. Adjust the V-Mv scroll bar to get the best fit between the ZAMS (green line) and the data. The older the cluster the fewer the stars left ...
Measuring stars Part I
... Using the weird equation, the distance to deneb can be calculated: 2500 light years (M – m = 5 – 5log(d)) One last obvious question: How did we ever know the Absolute visual magnitude to Deneb without knowing its distance in the ...
... Using the weird equation, the distance to deneb can be calculated: 2500 light years (M – m = 5 – 5log(d)) One last obvious question: How did we ever know the Absolute visual magnitude to Deneb without knowing its distance in the ...
Planets around Other Stars
... Reproduced below is a plot of observations of the radial velocity of the star 51 Pegasi, the first star discovered to have a planet. The observed velocity (in meters per second) is plotted vs. the time (in days) when the observation was made. The velocity of the star varies with time because the sta ...
... Reproduced below is a plot of observations of the radial velocity of the star 51 Pegasi, the first star discovered to have a planet. The observed velocity (in meters per second) is plotted vs. the time (in days) when the observation was made. The velocity of the star varies with time because the sta ...
Phys133 Sample MidTerm #2 Covers Chs.10
... 4) What happens when a star exhausts its core hydrogen supply? A) It contracts, becoming hotter and brighter. B) Its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness. C) It expands, becoming bigger but dimmer. D) It contr ...
... 4) What happens when a star exhausts its core hydrogen supply? A) It contracts, becoming hotter and brighter. B) Its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness. C) It expands, becoming bigger but dimmer. D) It contr ...
Star formation - Grosse Pointe Public School System
... keeps the star a stable size until late in its life. During this time, the star is on the Main Sequence of the H-R Diagram. ...
... keeps the star a stable size until late in its life. During this time, the star is on the Main Sequence of the H-R Diagram. ...
Environmental Science
... Over the course of time, the North Star changes. Right now Polaris is within one degree of true north, but at other times the North Star has been and will again be Thuban (the brightest star in the constellation Draco), Vega (the brightest star in the constellation Lyra), and Alpha Cephei (the brigh ...
... Over the course of time, the North Star changes. Right now Polaris is within one degree of true north, but at other times the North Star has been and will again be Thuban (the brightest star in the constellation Draco), Vega (the brightest star in the constellation Lyra), and Alpha Cephei (the brigh ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... testable, and a test only makes sense if it is conceivable that the theory will fail. In that sense, we can never prove a scientific theory right. If a hypothesis can be proved right, it may be a valid mathematical or logical theorem, but it’s not a scientific theory. We are confident that the theor ...
... testable, and a test only makes sense if it is conceivable that the theory will fail. In that sense, we can never prove a scientific theory right. If a hypothesis can be proved right, it may be a valid mathematical or logical theorem, but it’s not a scientific theory. We are confident that the theor ...
Oct 2017 - What`s Out Tonight?
... The planets are best observed with a telescope using magnifithat were born out of the same nebula cloud. A group often forms cations from 50x to 200x. The five naked-eye planets are Mera pretty pattern. The Pleiades and Praesepe are great examples. cury, Venus, Mars, Jupiter and Saturn. Venus is ext ...
... The planets are best observed with a telescope using magnifithat were born out of the same nebula cloud. A group often forms cations from 50x to 200x. The five naked-eye planets are Mera pretty pattern. The Pleiades and Praesepe are great examples. cury, Venus, Mars, Jupiter and Saturn. Venus is ext ...
finding masses of extrasolar planets
... Each of the various techniques for finding extrasolar planets also provides extra information about the planets and their stars. For example, the Doppler technique gives us information about the star’s velocity toward or away from us, and from this we can find it’s mass. It is possible to calculate ...
... Each of the various techniques for finding extrasolar planets also provides extra information about the planets and their stars. For example, the Doppler technique gives us information about the star’s velocity toward or away from us, and from this we can find it’s mass. It is possible to calculate ...
1/2016
... as H VI.20. NGC 288 attracted attention of astronomers in the late 1980s when it was compared with the otherwise similar globular cluster NGC 362 on about the same right ascension (but much more southern), and found that NGC 288 must be about 3 billion years older. This result was found because of d ...
... as H VI.20. NGC 288 attracted attention of astronomers in the late 1980s when it was compared with the otherwise similar globular cluster NGC 362 on about the same right ascension (but much more southern), and found that NGC 288 must be about 3 billion years older. This result was found because of d ...
Astronomy
... 22. Which spectral class of stars (which letter) have the lowest temperature? _____________ ...
... 22. Which spectral class of stars (which letter) have the lowest temperature? _____________ ...
Astronomy Exam #2 for the 10
... 8) The picture below portrays a proposed new space mission to establish a Hipparchus-like spacecraft in orbit around Jupiter for the purpose of measuring stellar parallaxes. In a couple of sentences, explain why a mission like this would be superior to the original Hipparchus spacecraft in orbit aro ...
... 8) The picture below portrays a proposed new space mission to establish a Hipparchus-like spacecraft in orbit around Jupiter for the purpose of measuring stellar parallaxes. In a couple of sentences, explain why a mission like this would be superior to the original Hipparchus spacecraft in orbit aro ...
The Milky Way - Houston Community College System
... end. In this chapter you will learn how stars die, and as you follow the story you will see how astronomers have tested their hypotheses against evidence to ...
... end. In this chapter you will learn how stars die, and as you follow the story you will see how astronomers have tested their hypotheses against evidence to ...
PHYSICS 015
... (That’s a lot of stars closely clustered together, but not unimaginable. There would be room!) Overall, at this stage the average density is less than that of water. (It is higher in the centres of individual stars, of course, but not dramatically so.) ...
... (That’s a lot of stars closely clustered together, but not unimaginable. There would be room!) Overall, at this stage the average density is less than that of water. (It is higher in the centres of individual stars, of course, but not dramatically so.) ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.