After Dark M S
... What are cosmic rays and how were they discovered? How can particles of light with trillions of times the energy of the light particles from the sun be used to do astronomy and learn about the sources of cosmic rays? HAWC, a cosmic ray observatory currently under construction, will detect and measur ...
... What are cosmic rays and how were they discovered? How can particles of light with trillions of times the energy of the light particles from the sun be used to do astronomy and learn about the sources of cosmic rays? HAWC, a cosmic ray observatory currently under construction, will detect and measur ...
Document
... • Mass of Sun • Radius of Earth • Hot as Sun’s core • A million times denser than lead • Slowly cool off ...
... • Mass of Sun • Radius of Earth • Hot as Sun’s core • A million times denser than lead • Slowly cool off ...
Stellar Evolution
... • When hydrogen fusion starts at the end of the protostar stage, a star is born on the `zero-age main sequence’. • As hydrogen is being converted into helium in the core of a star, its structure changes slowly and stellar evolution begins. ...
... • When hydrogen fusion starts at the end of the protostar stage, a star is born on the `zero-age main sequence’. • As hydrogen is being converted into helium in the core of a star, its structure changes slowly and stellar evolution begins. ...
Lecture 18, Gravitational Waves, Future Missions and
... Gravitational waves are often described as ripples in space-time. In general relativity, mass leads to a curvature of space-time. Gravity waves are produced by accelerating masses (if the motion is not perfectly symmetric). Gravity waves have not yet been detected, though we do have indirect evidenc ...
... Gravitational waves are often described as ripples in space-time. In general relativity, mass leads to a curvature of space-time. Gravity waves are produced by accelerating masses (if the motion is not perfectly symmetric). Gravity waves have not yet been detected, though we do have indirect evidenc ...
Telescopes (continued). Properties of Stars.
... span ~30 light-years (10 pc). Pleiades Globular clusters can contain more than a million stars and span 60-150 light-years. ...
... span ~30 light-years (10 pc). Pleiades Globular clusters can contain more than a million stars and span 60-150 light-years. ...
Astronomy Fall 2013 Final Exam History of Astronomy Know: speed
... light on earth you see a flash of light like a light house. 7. What produces a Type II supernova? Supermassive (greater than 12 solar masses) cloud starts fusing elements until it makes an iron core- then it recoils and explodes 8.Almost half of all known millisecond pulsars are found in what type o ...
... light on earth you see a flash of light like a light house. 7. What produces a Type II supernova? Supermassive (greater than 12 solar masses) cloud starts fusing elements until it makes an iron core- then it recoils and explodes 8.Almost half of all known millisecond pulsars are found in what type o ...
Classnotes 9_159 - University of Texas Astronomy
... 20 light years the more distant star is twice as far as the nearer one. If d increases by a factor of 2, d2 increases by 2 x 2 = 4 times. Then, the star at 20 light years is 4 times fainter than the one at 10 light years. ...
... 20 light years the more distant star is twice as far as the nearer one. If d increases by a factor of 2, d2 increases by 2 x 2 = 4 times. Then, the star at 20 light years is 4 times fainter than the one at 10 light years. ...
Across the Universe
... the Earth’s rotation with its gravity. The Earth and its solar system are part of a bigger area of space called the Milky Way galaxy. The Milky Way is a galaxy named this way because it appears in the sky as a “Milky” glowing band. In 1610 Galileo Galilei used his telescope and discovered that the M ...
... the Earth’s rotation with its gravity. The Earth and its solar system are part of a bigger area of space called the Milky Way galaxy. The Milky Way is a galaxy named this way because it appears in the sky as a “Milky” glowing band. In 1610 Galileo Galilei used his telescope and discovered that the M ...
Aspire: Star Life Cycle - Easy Peasy All-in
... 20. Choose a hypothesis and then continue. 21. Where would you expect to find other main sequence stars of the same size on this diagram? (2 Points) 22. Which description of the relationship is correct? (2 Points) 23. Write down the hypothesis that is correct. (2 Points) 24. Determine if the followi ...
... 20. Choose a hypothesis and then continue. 21. Where would you expect to find other main sequence stars of the same size on this diagram? (2 Points) 22. Which description of the relationship is correct? (2 Points) 23. Write down the hypothesis that is correct. (2 Points) 24. Determine if the followi ...
Conservation of energy
... (+ Li, Be, B) → starting from carbon The chemical composition of the primitive solar system can be determined by the analysis of some meteorites as well as of the solar spectrum It is representative of what is usually found in the Univers (cosmic abundances) within a common scale factor for carbon a ...
... (+ Li, Be, B) → starting from carbon The chemical composition of the primitive solar system can be determined by the analysis of some meteorites as well as of the solar spectrum It is representative of what is usually found in the Univers (cosmic abundances) within a common scale factor for carbon a ...
Unit 1
... to the main sequence, stay for a while, and eventually move through giant stages before becoming white dwarfs • Higher mass stars move rapidly off the main sequence and into the giant stages, eventually exploding in a supernova ...
... to the main sequence, stay for a while, and eventually move through giant stages before becoming white dwarfs • Higher mass stars move rapidly off the main sequence and into the giant stages, eventually exploding in a supernova ...
Teachers Notes - Edinburgh International Science Festival
... All of the planets in our solar system orbit on paths which are approximately level with each other and travel in the same direction (anti-clockwise) around the sun. Every planet is individual, each being composed of different materials and orbiting at a different distance from the sun. The planets ...
... All of the planets in our solar system orbit on paths which are approximately level with each other and travel in the same direction (anti-clockwise) around the sun. Every planet is individual, each being composed of different materials and orbiting at a different distance from the sun. The planets ...
Today`s Powerpoint
... Mass of end products is less than mass of 4 protons by 0.7%. Mass converted to energy. 600 millions of tons per second fused. Takes billions of years to convert p's to 4He in Sun's core. Process sets lifetime of stars. Hydrostatic Equilibrium: pressure from fusion reactions balances gravity. Sun is ...
... Mass of end products is less than mass of 4 protons by 0.7%. Mass converted to energy. 600 millions of tons per second fused. Takes billions of years to convert p's to 4He in Sun's core. Process sets lifetime of stars. Hydrostatic Equilibrium: pressure from fusion reactions balances gravity. Sun is ...
Phys133 SAMPLE questions for MidTerm#1
... 18) Suppose the Sun were to suddenly shrink in size but its mass remained the same. According to the law of conservation of angular momentum, what would happen? A) The Sun's rate of rotation would slow. B) This could never happen, because it is impossible for an object to shrink in size without an o ...
... 18) Suppose the Sun were to suddenly shrink in size but its mass remained the same. According to the law of conservation of angular momentum, what would happen? A) The Sun's rate of rotation would slow. B) This could never happen, because it is impossible for an object to shrink in size without an o ...
Astro 1 & 100 Levine Homework Stars Name:____________________________
... You may want to do the lecture-tutorial on pg 33, Apparent and Absolute Magnitude of Stars, prior to doing this portion of the homework, if you need a refresher on m and M. Ranking questions are 2 points each. Consider the following table of stars: ...
... You may want to do the lecture-tutorial on pg 33, Apparent and Absolute Magnitude of Stars, prior to doing this portion of the homework, if you need a refresher on m and M. Ranking questions are 2 points each. Consider the following table of stars: ...
Red Giant Red Giant White Giant Red Giant White Giant White Giant
... layers are expanding as the core becomes hotter and hotter. The heat is generated by the shrinking of the star’s core as hydrogen fuel is depleted. Mass: 1 - 4 Solar Mass StarPower Points: 7 ...
... layers are expanding as the core becomes hotter and hotter. The heat is generated by the shrinking of the star’s core as hydrogen fuel is depleted. Mass: 1 - 4 Solar Mass StarPower Points: 7 ...
Friday, Oct. 17
... Once they are hot enough inside (about 107 K) fusion can replace the energy they are losing. They are then in a stable thermal equilibrium; if fusion slowed down, they would contract and heat up causing fusion to speed back up until it balances the energy they are losing. Because of this stable equi ...
... Once they are hot enough inside (about 107 K) fusion can replace the energy they are losing. They are then in a stable thermal equilibrium; if fusion slowed down, they would contract and heat up causing fusion to speed back up until it balances the energy they are losing. Because of this stable equi ...
Barium Stars Observed with the Coude Echelle Spectrometer
... observed as independent light modulations, this means that th.e 859 s period is connected with radiation emitted originally wlth an 805 s period and "reflected" somehow from an element of the system taking part in (prograde) orbital motion. Thus, we can adopt the following working model of the syste ...
... observed as independent light modulations, this means that th.e 859 s period is connected with radiation emitted originally wlth an 805 s period and "reflected" somehow from an element of the system taking part in (prograde) orbital motion. Thus, we can adopt the following working model of the syste ...
Stellar nuclear reactions 3
... don’t experience the Strong nuclear force (which acts on the property of “colour” which only quarks possess). They can only experience the Weak nuclear force, which, because it is several orders of magnitude weaker than the others, means that neutrinos can travel through the Sun (and Earth) without ...
... don’t experience the Strong nuclear force (which acts on the property of “colour” which only quarks possess). They can only experience the Weak nuclear force, which, because it is several orders of magnitude weaker than the others, means that neutrinos can travel through the Sun (and Earth) without ...
Ast 405, Pulsating Stars The following is based Chapter 14 of the
... The following is based Chapter 14 of the book. • 1. Stars whose brightness varies regularly due to some internal mechanism. • 2. Examples are Miras, Cepheids, RR Lyraes, W Virginis, BL Her stars. You shouyld be familiar with Table 14.1 in the book. • 3. The Cepheid Period-Luminosity relation, or PL ...
... The following is based Chapter 14 of the book. • 1. Stars whose brightness varies regularly due to some internal mechanism. • 2. Examples are Miras, Cepheids, RR Lyraes, W Virginis, BL Her stars. You shouyld be familiar with Table 14.1 in the book. • 3. The Cepheid Period-Luminosity relation, or PL ...