The Universe
... •Almost every nebula is hundreds of times bigger than the critical size needed to form a stable star –―Precisely how a section of an interstellar cloud collapses gravitationally into a star…is still a challenging theoretical problem…Astronomers have yet to find an interstellar cloud in the actual pr ...
... •Almost every nebula is hundreds of times bigger than the critical size needed to form a stable star –―Precisely how a section of an interstellar cloud collapses gravitationally into a star…is still a challenging theoretical problem…Astronomers have yet to find an interstellar cloud in the actual pr ...
Tour of the Galaxy - Shelbyville Central Schools
... contains thousands of galaxies. Each of these galaxies houses billions of stars - just as our own Milky Way Galaxy does. Light from the Coma Cluster takes hundreds of millions of years to reach us. ...
... contains thousands of galaxies. Each of these galaxies houses billions of stars - just as our own Milky Way Galaxy does. Light from the Coma Cluster takes hundreds of millions of years to reach us. ...
Southern cross Crux - The Southern Cross Crux, the Southern Cross
... Crux lies along the southern Milky Way. It is rich in star clusters, and includes the Coalsack dust cloud. NGC 4755 is called the Jewel Box cluster. It contains about 60 stars ranging in magnitude from 6 to 10. The Jewel Box is one of the brightest and youngest clusters known. The stars are mostly s ...
... Crux lies along the southern Milky Way. It is rich in star clusters, and includes the Coalsack dust cloud. NGC 4755 is called the Jewel Box cluster. It contains about 60 stars ranging in magnitude from 6 to 10. The Jewel Box is one of the brightest and youngest clusters known. The stars are mostly s ...
Name: Notes – #54 White Dwarf Supernovae
... 9. Radioactive nickel is created that then decays into _______________ and then into ________________. In the process _________________________ (very high energy light) is produced. 10. How much nickel is formed during a Type 1a supernova explosion? 11. What would we see if the radioactive nickel a ...
... 9. Radioactive nickel is created that then decays into _______________ and then into ________________. In the process _________________________ (very high energy light) is produced. 10. How much nickel is formed during a Type 1a supernova explosion? 11. What would we see if the radioactive nickel a ...
ASTR 300 Stars and Stellar Systems Spring 2011
... of space because these stars are very rare. On the other hand, the least luminous stars are quite common, but are so faint they are hard to see even if they are close. 2. The parallax of the bright star Vega is 0.129 seconds of arc. What is the distance of Vega in parsecs ? In light-years ? We have ...
... of space because these stars are very rare. On the other hand, the least luminous stars are quite common, but are so faint they are hard to see even if they are close. 2. The parallax of the bright star Vega is 0.129 seconds of arc. What is the distance of Vega in parsecs ? In light-years ? We have ...
Physics - Content by Unit
... At about the same time, astronomers Kent Ford and Vera Cooper Rubin at the Carnegie Institution of Washington began a detailed study of the motion of stars in the nearby galaxy of Andromeda. Galaxies are so large that even stars traveling at 200 kilometers per second appear stationary; astronomers m ...
... At about the same time, astronomers Kent Ford and Vera Cooper Rubin at the Carnegie Institution of Washington began a detailed study of the motion of stars in the nearby galaxy of Andromeda. Galaxies are so large that even stars traveling at 200 kilometers per second appear stationary; astronomers m ...
Conversations with the Earth
... • You need “metals” to make planets –Metals are elements heavier in mass than helium ...
... • You need “metals” to make planets –Metals are elements heavier in mass than helium ...
galaxy phenomenology
... ‣ the most luminous AGN are called quasars (can outshine entire host galaxy) ‣ in local Universe, quasars are associated with galaxy mergers ...
... ‣ the most luminous AGN are called quasars (can outshine entire host galaxy) ‣ in local Universe, quasars are associated with galaxy mergers ...
Astr40 HWIII(new) - Empyrean Quest Publishers
... will be a strong x-ray source. (T or F) 33. Gamma rays burst could NOT be caused by the formation of black holes. (T or F) 34. Dark lanes across the band of the Milky Way are truly devoid of stars. (T or F) 35. The spiral arm disk of the Milky Way is roughly how many light years across? A. 10,000 B. ...
... will be a strong x-ray source. (T or F) 33. Gamma rays burst could NOT be caused by the formation of black holes. (T or F) 34. Dark lanes across the band of the Milky Way are truly devoid of stars. (T or F) 35. The spiral arm disk of the Milky Way is roughly how many light years across? A. 10,000 B. ...
Opakování z minulého cvičení
... A measure of distance defined as the average distance between the Sun and the Earth over one orbit (one year). 1AU is equal to 149,597,870 km (=499.005 light seconds). ...
... A measure of distance defined as the average distance between the Sun and the Earth over one orbit (one year). 1AU is equal to 149,597,870 km (=499.005 light seconds). ...
HST Observations of the
... because it did not become obstructed during orbit by the Earth or Moon and it is also relatively free of foreground stars and other galaxy clusters images of the region were taken using ultraviolet, optical and infrared ...
... because it did not become obstructed during orbit by the Earth or Moon and it is also relatively free of foreground stars and other galaxy clusters images of the region were taken using ultraviolet, optical and infrared ...
b. - UW Canvas
... dependence of the parallax angle on the distance an object is from Earth. If the minimum parallax angle we could measure were 0.5 arcsec, what is the maximum distance of a star that we could measure? ...
... dependence of the parallax angle on the distance an object is from Earth. If the minimum parallax angle we could measure were 0.5 arcsec, what is the maximum distance of a star that we could measure? ...
Document
... In the early part of this century, astronomer Ejnar Hertzsprung studied the luminosities and types of stars. Soon, he and American astronomer, Henry Russell, developed a graphical representation comparing a star’s temperature against its luminosity (also called absolute magnitude) and types of stars ...
... In the early part of this century, astronomer Ejnar Hertzsprung studied the luminosities and types of stars. Soon, he and American astronomer, Henry Russell, developed a graphical representation comparing a star’s temperature against its luminosity (also called absolute magnitude) and types of stars ...
1 pracovni list HR diagram I EN
... Distance to star r can be calculated from the parallax π using the formula r = 1 π , where distance is in parsecs (pc). Parallax π is given in arc seconds in column Plx. Note: value of the parallax in the catalogue is in arc milliseconds. Mark the new column as r. Absolute magnitude M can be calcula ...
... Distance to star r can be calculated from the parallax π using the formula r = 1 π , where distance is in parsecs (pc). Parallax π is given in arc seconds in column Plx. Note: value of the parallax in the catalogue is in arc milliseconds. Mark the new column as r. Absolute magnitude M can be calcula ...
Astronomy Facts
... The sun is 1.4 million km across (110 times the earth), and over 150 million km away (500 light seconds) The largest stars (eg: Betelgeuse, Antares) are over 400 million km across (more than 300 times the diameter of the Sun) The brightest stars are over 10,000 times brighter than the sun. The dista ...
... The sun is 1.4 million km across (110 times the earth), and over 150 million km away (500 light seconds) The largest stars (eg: Betelgeuse, Antares) are over 400 million km across (more than 300 times the diameter of the Sun) The brightest stars are over 10,000 times brighter than the sun. The dista ...
doc - Eu-Hou
... telescope) and by Marc Serreau (a French amateur astronomer with a C8 (8-inch ~ 20cm) telescope. The quality of the images is moderate, but it is possible to perform astronomical measurements. Supernovae of type Ia can be used as standard candles to measure the distance D of galaxies. It is one meth ...
... telescope) and by Marc Serreau (a French amateur astronomer with a C8 (8-inch ~ 20cm) telescope. The quality of the images is moderate, but it is possible to perform astronomical measurements. Supernovae of type Ia can be used as standard candles to measure the distance D of galaxies. It is one meth ...
Our galaxy, the Milky Way, has about 3 billion solar masses of HI
... The distance of individual neutral hydrogen clouds in the galaxy’s disk can be determined using their radial velocities (that are determined from their Doppler shifts). Thus, astronomers can determine both the distance to these clouds of hydrogen and their velocity. With the hydrogen cloud’s velocit ...
... The distance of individual neutral hydrogen clouds in the galaxy’s disk can be determined using their radial velocities (that are determined from their Doppler shifts). Thus, astronomers can determine both the distance to these clouds of hydrogen and their velocity. With the hydrogen cloud’s velocit ...
H-R Diagram - Faculty Website Listing
... Please read the section in textbook that talks about HR diagram. We have also discussed this in class with examples. It may be useful to have your class notes with you when you do the lab. You can also look them up on the class webpage. 1. Using Stellarium software to collect the information on abso ...
... Please read the section in textbook that talks about HR diagram. We have also discussed this in class with examples. It may be useful to have your class notes with you when you do the lab. You can also look them up on the class webpage. 1. Using Stellarium software to collect the information on abso ...
Chapter 8 - TeacherWeb
... the sphere becomes denser it becomes hotter. Hydrogen changes to helium by a process called nuclear fusion. When a star dies its materials return to space---sometimes to form new stars. Stars can be classified by their size, mass, brightness, color, temperature, spectrum, and age. Can also be classi ...
... the sphere becomes denser it becomes hotter. Hydrogen changes to helium by a process called nuclear fusion. When a star dies its materials return to space---sometimes to form new stars. Stars can be classified by their size, mass, brightness, color, temperature, spectrum, and age. Can also be classi ...
Observing Information for Waddesdon, 4th October 2014
... This is an asterism of three bright stars, Deneb, Vega and Altair. It is easily visible with the unaided eye and is useful for locating other objects at this time of year. Deneb is the bright star that’s very high to the SE. It’s the brightest star in the constellation Cygnus. It is 1400 light years ...
... This is an asterism of three bright stars, Deneb, Vega and Altair. It is easily visible with the unaided eye and is useful for locating other objects at this time of year. Deneb is the bright star that’s very high to the SE. It’s the brightest star in the constellation Cygnus. It is 1400 light years ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.