RASC Bulletin June 1996 - Royal Astronomical Society of Canada
... always a bad speller! The more important in sight was that one can do amazing things with ...
... always a bad speller! The more important in sight was that one can do amazing things with ...
1) The following questions refer to the HR diagram
... 2) On a Hertzsprung-Russell diagram, where would we find white dwarfs? A) upper left B) lower right C) lower left D) upper right 3) A star of spectral type O lives approximately how long on the main sequence? A) 10,000 years B) 1 million years C) 1,000 years D) 1 billion years E) 100 million years 4 ...
... 2) On a Hertzsprung-Russell diagram, where would we find white dwarfs? A) upper left B) lower right C) lower left D) upper right 3) A star of spectral type O lives approximately how long on the main sequence? A) 10,000 years B) 1 million years C) 1,000 years D) 1 billion years E) 100 million years 4 ...
Astronomical Distance Ladder
... determined. Some values of Ho (100km/s/Mpc) give an approximate age of the universe around 6.5 billion years old while others (40km/s/Mpc) produce ages of 16.5 billion years. This inaccuracy arises from the fact that Ho is found by using an astronomical distance ladder, where farther distances are c ...
... determined. Some values of Ho (100km/s/Mpc) give an approximate age of the universe around 6.5 billion years old while others (40km/s/Mpc) produce ages of 16.5 billion years. This inaccuracy arises from the fact that Ho is found by using an astronomical distance ladder, where farther distances are c ...
Astronomy - Career Account Web Pages
... The farthest and one of the very earliest galaxies ever seen in the universe appears as a faint red blob in this ultra-deep–field exposure taken with NASA's Hubble Space Telescope. This is the deepest infrared image taken of the universe. Based on the object's color, astronomers believe it is 13.2 b ...
... The farthest and one of the very earliest galaxies ever seen in the universe appears as a faint red blob in this ultra-deep–field exposure taken with NASA's Hubble Space Telescope. This is the deepest infrared image taken of the universe. Based on the object's color, astronomers believe it is 13.2 b ...
phys-1600 - Dave Heppenstall
... • In Io's case, there are immense volcanoes which are constantly being churned inside out and renewing its surface. This is due to the close proximity to Jupiter and the enormous gravitational force. • Io has no atmosphere. If Io moves in closer to Jupiter, it could be torn apart. Io is also in an e ...
... • In Io's case, there are immense volcanoes which are constantly being churned inside out and renewing its surface. This is due to the close proximity to Jupiter and the enormous gravitational force. • Io has no atmosphere. If Io moves in closer to Jupiter, it could be torn apart. Io is also in an e ...
24.1 Hubble`s Galaxy Classification
... Type I supernovae (carbon detonation supernovae) all have about the same luminosity at the peak of their light curve (see Ch.21), because the process by which they explode (luckily) doesn’t allow for much variation. They can be used as “standard candles”—objects whose absolute magnitude is known, an ...
... Type I supernovae (carbon detonation supernovae) all have about the same luminosity at the peak of their light curve (see Ch.21), because the process by which they explode (luckily) doesn’t allow for much variation. They can be used as “standard candles”—objects whose absolute magnitude is known, an ...
Fig. 16-7, p.363
... from a disk around the Sun as it formed; such protoplanetary disks are seen around many young stars • Planets like Earth are believed therefore to form as normal byproducts of stars forming • There are two types of planets in our solar system, Earth-like and Jupiter-like, results of a process we thi ...
... from a disk around the Sun as it formed; such protoplanetary disks are seen around many young stars • Planets like Earth are believed therefore to form as normal byproducts of stars forming • There are two types of planets in our solar system, Earth-like and Jupiter-like, results of a process we thi ...
STAR FORMATION
... What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change B. Its mass would increase C. Its internal pressure would increase ...
... What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change B. Its mass would increase C. Its internal pressure would increase ...
New light on our Sun`s fate - Space Telescope Science Institute
... nearly 30th magnitude. We plotted all the stars on the H-R diagram (see illustration on p. 46); with such figures, we can place tight constraints on the fundamental properties of each cluster, such as its age. This is because stars’ evolution corresponds to how massive they are at birth. To determin ...
... nearly 30th magnitude. We plotted all the stars on the H-R diagram (see illustration on p. 46); with such figures, we can place tight constraints on the fundamental properties of each cluster, such as its age. This is because stars’ evolution corresponds to how massive they are at birth. To determin ...
Chapter21
... 15. If the mass-losing star is more massive, the separation of the two stars decreases, and the mass-losing star continues to fill its Roche lobe even as it loses mass. 16. They lose orbital energy through friction with gas in the common envelope. 17. The two stars can exceed escape velocity and go ...
... 15. If the mass-losing star is more massive, the separation of the two stars decreases, and the mass-losing star continues to fill its Roche lobe even as it loses mass. 16. They lose orbital energy through friction with gas in the common envelope. 17. The two stars can exceed escape velocity and go ...
HR Diagram - TeacherWeb
... Gizmo. The numbers given for Luminosity, Radius, and Mass are in comparison to the Sun. So, a star with a radius of “2 Suns” is twice as large as the Sun. Temperature is given using the Kelvin scale, where 273.15 K = 0 °C and 373.15 K = 100 °C. 1. Find Betelgeuse in the Star collection. Fill out the ...
... Gizmo. The numbers given for Luminosity, Radius, and Mass are in comparison to the Sun. So, a star with a radius of “2 Suns” is twice as large as the Sun. Temperature is given using the Kelvin scale, where 273.15 K = 0 °C and 373.15 K = 100 °C. 1. Find Betelgeuse in the Star collection. Fill out the ...
Project 4: The HR diagram. Open clusters
... they must be very small, so they're called white dwarfs. ...
... they must be very small, so they're called white dwarfs. ...
Lecture 10-11 - OSU Astronomy
... interpretation of stellar spectra. • Based on the then new atomic physics. ...
... interpretation of stellar spectra. • Based on the then new atomic physics. ...
Star Basics
... The spectra of O-Type stars shows the presence of hydrogen and helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can i ...
... The spectra of O-Type stars shows the presence of hydrogen and helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can i ...
Activity 1 - Mathematical and Scientific Methods
... 65% of your grade will come from active involvement! ...
... 65% of your grade will come from active involvement! ...
EarthComm_c1s9
... interesting, but they also show scientists what the fate of our solar system will be billions of years from now. What would happen if there were a supernova explosion in our stellar neighborhood some time in the future? Depending on how close it was, you could be bombarded with strong radiation and ...
... interesting, but they also show scientists what the fate of our solar system will be billions of years from now. What would happen if there were a supernova explosion in our stellar neighborhood some time in the future? Depending on how close it was, you could be bombarded with strong radiation and ...
Chapter 13 (Properties of Stars)
... 2. Explain why that the vast majority of naked eye stars lie to the upper left of the Sun on the H-R diagram, yet the majority of nearby stars are found to the lower right of our star. Relate this to the limitations of human vision. 3. Sirius and its companion are almost the same temperature, yet Si ...
... 2. Explain why that the vast majority of naked eye stars lie to the upper left of the Sun on the H-R diagram, yet the majority of nearby stars are found to the lower right of our star. Relate this to the limitations of human vision. 3. Sirius and its companion are almost the same temperature, yet Si ...
DTU 8e Chap 17 Quasars and Other Active Galaxies
... (a) Radio image produced from observations made at the Very Large Array. Most of the radio emissions from Cygnus A come from the radio lobes located on either side of the peculiar galaxy seen in the inset, a Hubble Space Telescope image. Each of the two radio lobes extend about 160,000 light-years f ...
... (a) Radio image produced from observations made at the Very Large Array. Most of the radio emissions from Cygnus A come from the radio lobes located on either side of the peculiar galaxy seen in the inset, a Hubble Space Telescope image. Each of the two radio lobes extend about 160,000 light-years f ...
Star formation, feedback and the role of SNe II and SNe Ia in the
... originally thought to be very similar in their metallicity and star formation histories to the galactic globular clusters, but their star formation history is now known to be much more complex. ...
... originally thought to be very similar in their metallicity and star formation histories to the galactic globular clusters, but their star formation history is now known to be much more complex. ...
Star - Astrophysics
... into a degenerate gas and then leads to helium burning. But because the degeneracy pressure does not increase and lead to expansion as the core heats further, the energy production becomes even stronger producing a brief ‘helium flash’. Helium core burning and hydrogen shell burning then continue, a ...
... into a degenerate gas and then leads to helium burning. But because the degeneracy pressure does not increase and lead to expansion as the core heats further, the energy production becomes even stronger producing a brief ‘helium flash’. Helium core burning and hydrogen shell burning then continue, a ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.