Properties of stars: temperature, colour index and equivalent width
... Liceo Scientifico “G.Galilei” Caselle di Selvazzano (Pd) ...
... Liceo Scientifico “G.Galilei” Caselle di Selvazzano (Pd) ...
CoRoT: a space project to listen to the songs of the stars
... Stars are balls of gas in equilibrium under the action of gravity. Many stars can vibrate in different modes like a musical instrument. For example, vibrations detected on the surface of the Sun have been well known for more than three decades. The stellar pulsations are difficult to detect as the s ...
... Stars are balls of gas in equilibrium under the action of gravity. Many stars can vibrate in different modes like a musical instrument. For example, vibrations detected on the surface of the Sun have been well known for more than three decades. The stellar pulsations are difficult to detect as the s ...
Star in a Box
... Almost all stars we see are in one of these groups, but they don’t stay in the same place. ...
... Almost all stars we see are in one of these groups, but they don’t stay in the same place. ...
ASTRONOMY 1 ... You may use this only this study guide for reference... No electronic devises: I pads, lap tops, phones, etc.
... 3. Why don't we see hydrogen Balmer lines in the spectra of very hot stars (like 45,000 K+/-) 4. What is the he proton-proton chain? Why does it need a high temperature? 5. What is a white dwarf? a supergiant star? A main sequence star? What type is our Sun? 6. The sun generates energy by fusion? By ...
... 3. Why don't we see hydrogen Balmer lines in the spectra of very hot stars (like 45,000 K+/-) 4. What is the he proton-proton chain? Why does it need a high temperature? 5. What is a white dwarf? a supergiant star? A main sequence star? What type is our Sun? 6. The sun generates energy by fusion? By ...
Big Bang, 429
... 3. Why don't we see hydrogen Balmer lines in the spectra of very hot stars (like 45,000 K+/-) 4. What is the he proton-proton chain? Why does it need a high temperature? 5. What is a white dwarf? a supergiant star? A main sequence star? What type is our Sun? 6. The sun generates energy by fusion? By ...
... 3. Why don't we see hydrogen Balmer lines in the spectra of very hot stars (like 45,000 K+/-) 4. What is the he proton-proton chain? Why does it need a high temperature? 5. What is a white dwarf? a supergiant star? A main sequence star? What type is our Sun? 6. The sun generates energy by fusion? By ...
Chap. 02
... For a degenerate gas, the ignition of helium burning will heat the gas, but do not cause expand The increased temperature makes the reaction go faster, which further heats the gas, which makes the reaction goes faster. This cycle of explosive nuclear reaction continues until temperature is high enou ...
... For a degenerate gas, the ignition of helium burning will heat the gas, but do not cause expand The increased temperature makes the reaction go faster, which further heats the gas, which makes the reaction goes faster. This cycle of explosive nuclear reaction continues until temperature is high enou ...
Outline2a
... Star Formation in the HR Diagram As the gas cloud collapses, the protostar gets smaller and smaller (and, due to the increased central pressure), hotter and hotter. Accretion will cause the mass of the protostar to increase more than 100 times. The star will move towards its place on the main seque ...
... Star Formation in the HR Diagram As the gas cloud collapses, the protostar gets smaller and smaller (and, due to the increased central pressure), hotter and hotter. Accretion will cause the mass of the protostar to increase more than 100 times. The star will move towards its place on the main seque ...
Hidden Stars Game
... Work with children in a small group, noting each child’s ability to count the stars with accuracy and say the amount using the cardinality principle (the last number counted represents the total). When children repeat the full count sequence, model the cardinality principle. For example, for four it ...
... Work with children in a small group, noting each child’s ability to count the stars with accuracy and say the amount using the cardinality principle (the last number counted represents the total). When children repeat the full count sequence, model the cardinality principle. For example, for four it ...
File - YEAR 11 EBSS PHYSICS DETAILED STUDIES
... A star may have enough fuel to last it billions of years, however models have shown that a stars life may not be as long. The hydrogen-hydrogen fusion process produces helium, as the concentration of helium builds up in the core, the reaction zone increases by ~10%, this causes some instability in ...
... A star may have enough fuel to last it billions of years, however models have shown that a stars life may not be as long. The hydrogen-hydrogen fusion process produces helium, as the concentration of helium builds up in the core, the reaction zone increases by ~10%, this causes some instability in ...
Life Cycle of Stars - Lab Science Schedule
... When the last of its energy is gone it becomes a dead star. How long this takes depends on the mass of the star when it was first formed. The smaller the starting mass of a star, the longer it will live. IV. Massive Stars When massive stars are formed, they usually have at least six times as much ma ...
... When the last of its energy is gone it becomes a dead star. How long this takes depends on the mass of the star when it was first formed. The smaller the starting mass of a star, the longer it will live. IV. Massive Stars When massive stars are formed, they usually have at least six times as much ma ...
Finding the North Star - Science
... Throughout the night, stars appear to travel across the sky in circular arcs. This apparent motion is caused by the Earth spinning on its axis. Stars that appear close to the North Star travel in small circles. Stars that appear far from the North Pole travel in wide circles. Because the North Star ...
... Throughout the night, stars appear to travel across the sky in circular arcs. This apparent motion is caused by the Earth spinning on its axis. Stars that appear close to the North Star travel in small circles. Stars that appear far from the North Pole travel in wide circles. Because the North Star ...
Talk
... Shell helium and hydrogen fusion (asymptotic giant phase) White dwarf phase, fusion completed This series of stages is similar for all stars with initial masses in the range 0.4 – 4.0 MŸ. More massive stars are able to start fusion reactions involving carbon and oxygen Ø next week. ...
... Shell helium and hydrogen fusion (asymptotic giant phase) White dwarf phase, fusion completed This series of stages is similar for all stars with initial masses in the range 0.4 – 4.0 MŸ. More massive stars are able to start fusion reactions involving carbon and oxygen Ø next week. ...
Stellar Evolution Diagram Answer Key:
... could be provided by a nearby supernova. When the matter in a nebula begins to collapse- it begins to spin rapidly and flattens into a disk shape. Protostar: A protostars lifetime is only a few years. As the nebula shrinks a central mass will collect towards the center. It heats up because of the co ...
... could be provided by a nearby supernova. When the matter in a nebula begins to collapse- it begins to spin rapidly and flattens into a disk shape. Protostar: A protostars lifetime is only a few years. As the nebula shrinks a central mass will collect towards the center. It heats up because of the co ...
More detailed notes - Particle Physics and Particle Astrophysics
... You may notice that the one-solar-mass track doesn’t have this reversal of direction at the end of the main sequence stage. That’s because in stars using the pp chain, the core is radiative rather than convective: the core material is not mixed, and the very centre of the core runs out of hydrogen w ...
... You may notice that the one-solar-mass track doesn’t have this reversal of direction at the end of the main sequence stage. That’s because in stars using the pp chain, the core is radiative rather than convective: the core material is not mixed, and the very centre of the core runs out of hydrogen w ...
Stars - Science
... The first star is larger than the second star. The first star is smaller than the second star. The first star is hotter than the second star. The first star is cooler than the second star. ...
... The first star is larger than the second star. The first star is smaller than the second star. The first star is hotter than the second star. The first star is cooler than the second star. ...
NAME___________ _PERIOD____DATE_____________ 29.3
... during the formation of a star. What is the correct label for the blank in the diagram? ...
... during the formation of a star. What is the correct label for the blank in the diagram? ...
Lecture6
... Lifetime (duration) for MS ~ Age of Star: Long, but shorter for more massive stars. Why? More massive MS stars are hotter H-burning proceeds more quickly, energy radiated more quickly, fuel (H) exhausted more quickly, etc. (see class notes & HR Diagram). ...
... Lifetime (duration) for MS ~ Age of Star: Long, but shorter for more massive stars. Why? More massive MS stars are hotter H-burning proceeds more quickly, energy radiated more quickly, fuel (H) exhausted more quickly, etc. (see class notes & HR Diagram). ...
M - IMAG2E
... Mass-luminosity relation For the few main-sequence stars for which masses are known, there is a Mass-luminosity relation. L Mn ...
... Mass-luminosity relation For the few main-sequence stars for which masses are known, there is a Mass-luminosity relation. L Mn ...
Astronomy: Life Cycle of a Star
... The light and heat from stars such as the Sun, is made by a process known as _________________________________. Fusion happens when two lightweight atoms are forced together to form a heavier one, producing a lot of ________________. However, fusion can only occur at the incredibly high ____________ ...
... The light and heat from stars such as the Sun, is made by a process known as _________________________________. Fusion happens when two lightweight atoms are forced together to form a heavier one, producing a lot of ________________. However, fusion can only occur at the incredibly high ____________ ...
Lecture - Ann Arbor Earth Science
... a star appears to be to an observer on Earth. The lower the apparent magnitude number, the brighter the star is. Some of the brightest stars in the sky are classified as first-magnitude stars. The faintest stars that can be seen with our unaided eye are called sixth-magnitude stars. Each magnitude d ...
... a star appears to be to an observer on Earth. The lower the apparent magnitude number, the brighter the star is. Some of the brightest stars in the sky are classified as first-magnitude stars. The faintest stars that can be seen with our unaided eye are called sixth-magnitude stars. Each magnitude d ...
Document
... Thus, distance from Earth no longer becomes a factor in how bright a star is. Remember, very bright stars that are very far from Earth may appear to be very faint to us. For example: Since our sun is so close to Earth, it has an apparent magnitude of –26.7. However, the sun has an absolute magnitude ...
... Thus, distance from Earth no longer becomes a factor in how bright a star is. Remember, very bright stars that are very far from Earth may appear to be very faint to us. For example: Since our sun is so close to Earth, it has an apparent magnitude of –26.7. However, the sun has an absolute magnitude ...
(HR) diagram - Cloudfront.net
... Thus, distance from Earth no longer becomes a factor in how bright a star is. Remember, very bright stars that are very far from Earth may appear to be very faint to us. For example: Since our sun is so close to Earth, it has an apparent magnitude of –26.7. However, the sun has an absolute magnitude ...
... Thus, distance from Earth no longer becomes a factor in how bright a star is. Remember, very bright stars that are very far from Earth may appear to be very faint to us. For example: Since our sun is so close to Earth, it has an apparent magnitude of –26.7. However, the sun has an absolute magnitude ...
The Stars: Distance, Luminosity, Size
... The more massive a Main Sequence star is, the hotter (bluer), and more luminous. The Main Sequence is a mass sequence! ...
... The more massive a Main Sequence star is, the hotter (bluer), and more luminous. The Main Sequence is a mass sequence! ...
PHYSICS 1500 ASTRONOMY Sample Exam Solutions Section B
... The spectrograph observation would be expected to reveal a systematic redshift of the spectral lines (since the galaxy is ‘much more distant’), plus motions of stars in the galaxy. IF(!) the galaxy was big enough to allow several positions of the spectrograph slit across it, we would expect no syste ...
... The spectrograph observation would be expected to reveal a systematic redshift of the spectral lines (since the galaxy is ‘much more distant’), plus motions of stars in the galaxy. IF(!) the galaxy was big enough to allow several positions of the spectrograph slit across it, we would expect no syste ...
STAR FORMATION
... • Much luminosity is generated in the collapse of the outer layers onto the opaque core: this accretion generated heat makes the protostar some 10's or 1000's of times as luminous as it will be when it gets to the Main Sequence • Protostars are 10's to 100's of times as large as they will be when on ...
... • Much luminosity is generated in the collapse of the outer layers onto the opaque core: this accretion generated heat makes the protostar some 10's or 1000's of times as luminous as it will be when it gets to the Main Sequence • Protostars are 10's to 100's of times as large as they will be when on ...