Beyond the Solar System
... If you go out at night and look at the sky you are likely to think that you can see a very large number of stars. In fact even on a clear night you only see about three thousand stars at a time, during a whole year you will only see about six thousand. On any night you will only see some of the star ...
... If you go out at night and look at the sky you are likely to think that you can see a very large number of stars. In fact even on a clear night you only see about three thousand stars at a time, during a whole year you will only see about six thousand. On any night you will only see some of the star ...
Slide 1
... We calculated the age to be between 12 to 14 billion years old It is 25,000 light years away from Earth ...
... We calculated the age to be between 12 to 14 billion years old It is 25,000 light years away from Earth ...
Three types of binary stars.
... Visual binaries – Stars that are far enough apart that they can be seen as separate stars through a telescope. They typically have orbital periods that are hundreds of years long. ...
... Visual binaries – Stars that are far enough apart that they can be seen as separate stars through a telescope. They typically have orbital periods that are hundreds of years long. ...
AST 301—Review for Exam 3 Consult “Guide to Reading and Study
... did you remember to tell your visitor that most comets spend most of their time very far from the sun? Make sure you imagine being asked why this is so and how we know it—can you give a reasonable answer? Did you mention the “Oort cloud?”) Remember that you don’t have to know anything about the vari ...
... did you remember to tell your visitor that most comets spend most of their time very far from the sun? Make sure you imagine being asked why this is so and how we know it—can you give a reasonable answer? Did you mention the “Oort cloud?”) Remember that you don’t have to know anything about the vari ...
(HR) Diagrams
... the laws of physics for the behavior of blackbodies (Wien’s law and the StefanBoltzmann law), it is these temperatures that account for why O and B stars have a bluish tint to their color and M stars have a reddish tint. ...
... the laws of physics for the behavior of blackbodies (Wien’s law and the StefanBoltzmann law), it is these temperatures that account for why O and B stars have a bluish tint to their color and M stars have a reddish tint. ...
Across the Universe
... days in each year. In turn, the moon orbits the earth, affecting the ocean tides, and slowing 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 a ...
... days in each year. In turn, the moon orbits the earth, affecting the ocean tides, and slowing 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 a ...
The Night Sky 12-07
... Reddish Mars is visible above the western horizon as the sky darkens in the late evening twilight. During the first few days of April, before it disappears from view, Mercury can be glimpsed along the horizon well below Mars. Jupiter reaches opposition this month, which means that it will be up all ...
... Reddish Mars is visible above the western horizon as the sky darkens in the late evening twilight. During the first few days of April, before it disappears from view, Mercury can be glimpsed along the horizon well below Mars. Jupiter reaches opposition this month, which means that it will be up all ...
Stars II. Stellar Physics
... uniqueness of the solution is claimed in the Russel-VogtTheorem: For a star of given chemical composition and mass there exists only one equilibrium configuration which solves the boundary problem of stellar structure. [In this generality, the theorem is not proven. Local uniqueness can be shown, ho ...
... uniqueness of the solution is claimed in the Russel-VogtTheorem: For a star of given chemical composition and mass there exists only one equilibrium configuration which solves the boundary problem of stellar structure. [In this generality, the theorem is not proven. Local uniqueness can be shown, ho ...
NOVAE and SUPERNOVAE
... The nova explosion causes the WD to increase in brightness by 10,000 times or more. From our perspective a new star shines in the sky. Novae are repeat phenomena; WDs may explode many times. The explosion cycle is regulated by the rate at which matter is deposited onto the WD. More violent (and ...
... The nova explosion causes the WD to increase in brightness by 10,000 times or more. From our perspective a new star shines in the sky. Novae are repeat phenomena; WDs may explode many times. The explosion cycle is regulated by the rate at which matter is deposited onto the WD. More violent (and ...
Calculating_Main_Sequence_Lifetimes_StudentGuide
... At the beginning of the twentieth century two astronomers, the Danish E. Hertzsprung and the American H. N. Russell, established a correlation between two important stellar parameters: brightness and color. Since ancient times, the brightness of a star is indicated by "magnitudes": 1, 2 and so on, w ...
... At the beginning of the twentieth century two astronomers, the Danish E. Hertzsprung and the American H. N. Russell, established a correlation between two important stellar parameters: brightness and color. Since ancient times, the brightness of a star is indicated by "magnitudes": 1, 2 and so on, w ...
Electromagnetic Radiation from the Sun
... 6. Why is information about many stars contained in absorption rather than emission spectra? If there is a cloud of gas at a cooler temperature directly between a denser source producing a continuous spectrum (i.e. a star) and a telescope, the gas will absorb light at specific wavelengths that are ...
... 6. Why is information about many stars contained in absorption rather than emission spectra? If there is a cloud of gas at a cooler temperature directly between a denser source producing a continuous spectrum (i.e. a star) and a telescope, the gas will absorb light at specific wavelengths that are ...
Fingerprints in Starlight: Spectroscopy of Stars Inquiry Questions
... atoms in cool stars only have electrons in the ground state. Very hot stars contain hydrogen that that is either ionized or with electrons excited to higher energy levels. In both cases the stars will have weak Balmer absorption lines. 6. Why is information about many stars contained in absorption ...
... atoms in cool stars only have electrons in the ground state. Very hot stars contain hydrogen that that is either ionized or with electrons excited to higher energy levels. In both cases the stars will have weak Balmer absorption lines. 6. Why is information about many stars contained in absorption ...
A planet is forming in an Earth-like orbit around a young star
... same distance as Earth is from the Sun, suggesting an infant version of our home planet could be emerging from the dust and gas. The additional concentric light and dark features represent other planet-forming regions farther out in the disk. S. Andrews (Harvard-Smithsonian CfA)/ALMA (ESO/NAOJ/NRAO) ...
... same distance as Earth is from the Sun, suggesting an infant version of our home planet could be emerging from the dust and gas. The additional concentric light and dark features represent other planet-forming regions farther out in the disk. S. Andrews (Harvard-Smithsonian CfA)/ALMA (ESO/NAOJ/NRAO) ...
CW9_MOST_GSphot_RK_v1
... • typically 4-8 guide stars, in special cases up to 20 are monitored for any given primary target • the magnitude range is 7-10.5, about 80% are of ‘known’ (listed) spectral type • exposure time is usually 1.5 sec (range from 0.3 to 1.5 applied) • no images are recovered, the image data is processed ...
... • typically 4-8 guide stars, in special cases up to 20 are monitored for any given primary target • the magnitude range is 7-10.5, about 80% are of ‘known’ (listed) spectral type • exposure time is usually 1.5 sec (range from 0.3 to 1.5 applied) • no images are recovered, the image data is processed ...
August Evening Skies
... The planet Jupiter is plotted at map time, mid-August 2008. Seven objects of first magnitude or brighter are visible. In order of brightness they are: Jupiter, Arcturus, Vega, Altair, Antares, Spica, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled ...
... The planet Jupiter is plotted at map time, mid-August 2008. Seven objects of first magnitude or brighter are visible. In order of brightness they are: Jupiter, Arcturus, Vega, Altair, Antares, Spica, and Deneb. In addition to stars, other objects that should be visible to the unaided eye are labeled ...
Lecture 1
... • When all things are equal, choose the theory or model that is simpler or requires fewer assumptions ...
... • When all things are equal, choose the theory or model that is simpler or requires fewer assumptions ...
Lecture 7 Stars and Galaxies and Nebula, (Oh My!) Feb 18 2003
... They orbit in the disk of our galaxy and don't last very long, members escape the group over time. All about the same age and composition so it is likely that they formed around the same time. ...
... They orbit in the disk of our galaxy and don't last very long, members escape the group over time. All about the same age and composition so it is likely that they formed around the same time. ...
Answer - Brock physics
... (a) * the night sky should not be dark. (b) the Sun should have died long ago. (c) the solar system should be considerably smaller. (d) the Milky Way should contain much more dust than it actually has. 39. A simple resolution to Olbers’s paradox, suggested by the poet Edgar Allan Poe, and later gene ...
... (a) * the night sky should not be dark. (b) the Sun should have died long ago. (c) the solar system should be considerably smaller. (d) the Milky Way should contain much more dust than it actually has. 39. A simple resolution to Olbers’s paradox, suggested by the poet Edgar Allan Poe, and later gene ...
Unit 3 *The Solar System* 6th Grade Space Science
... System by characteristics, such as: shape, and appearance, what they orbit, how large they are, and how far away their orbits are from the Sun. ...
... System by characteristics, such as: shape, and appearance, what they orbit, how large they are, and how far away their orbits are from the Sun. ...
Stars - Quia
... What is a star? - body of gasses that give off “tons of” energy (light & heat) - clusters = those little specks in the sky that we see may really be more than one star…. ...
... What is a star? - body of gasses that give off “tons of” energy (light & heat) - clusters = those little specks in the sky that we see may really be more than one star…. ...
An introduction to the HR diagram File
... • Stars of around solar mass will become red giants • Red giants are stars which are excessively luminous for their temperature. • This is because they have large radius. • They are stars that have ceased burning hydrogen as a fuel. • Their outer layers have expanded and ...
... • Stars of around solar mass will become red giants • Red giants are stars which are excessively luminous for their temperature. • This is because they have large radius. • They are stars that have ceased burning hydrogen as a fuel. • Their outer layers have expanded and ...
giant molecular clouds
... II. The Source of Stellar Energy A. A Review of the Proton-Proton Chain B. The CNO Cycle III. Stellar Structure A. Energy Transport B. What Supports the Sun? C. Inside Stars D. The Pressure-Temperature Thermostat ...
... II. The Source of Stellar Energy A. A Review of the Proton-Proton Chain B. The CNO Cycle III. Stellar Structure A. Energy Transport B. What Supports the Sun? C. Inside Stars D. The Pressure-Temperature Thermostat ...