Wednesday, November 7, 2007
... Suppose you could represent the age of the solar system, so far, by one calendar year. Then 1 day would represent about 13 million years. ...
... Suppose you could represent the age of the solar system, so far, by one calendar year. Then 1 day would represent about 13 million years. ...
Stars I - Astronomy Centre
... • A planet has two kinds of angular momentum orbital and spin - due to the orbit of the planet around the Sun and rotation of the planet about its own spin axis respectively • Given that angular momentum depends on mass, size of object/orbit and velocity of rotation/revolution, which form contribute ...
... • A planet has two kinds of angular momentum orbital and spin - due to the orbit of the planet around the Sun and rotation of the planet about its own spin axis respectively • Given that angular momentum depends on mass, size of object/orbit and velocity of rotation/revolution, which form contribute ...
AST 207 Homework 5 Due 14 October 2011
... How much larger is Deneb than the sun? (2 pts.) Explain the principle(s) that you use and where you got the values. 3. M15. Figure 1 is the Hertzsprung-Russell diagram of the star cluster M15. a. (not graded) What is the absolute magnitude of the hottest main-sequence stars? b. (not graded) Why are ...
... How much larger is Deneb than the sun? (2 pts.) Explain the principle(s) that you use and where you got the values. 3. M15. Figure 1 is the Hertzsprung-Russell diagram of the star cluster M15. a. (not graded) What is the absolute magnitude of the hottest main-sequence stars? b. (not graded) Why are ...
Integrative Studies 410 Our Place in the Universe
... • Cepheids in Andromeda Galaxies established the “extragalacticity” of this “nebula” ...
... • Cepheids in Andromeda Galaxies established the “extragalacticity” of this “nebula” ...
Astronomy Quiz 12 “Stars
... C. apparent D. relative _____2. 80% of all stars in the galaxy are __ while only 1 in 10,000 is a __. A. white dwarfs / red giant C. red giants / blue dwarfs B. yellow dwarfs / red supergiant D. red dwarfs / blue supergiant _____3. The actual 3D motion of stars relative to each other in a rotating a ...
... C. apparent D. relative _____2. 80% of all stars in the galaxy are __ while only 1 in 10,000 is a __. A. white dwarfs / red giant C. red giants / blue dwarfs B. yellow dwarfs / red supergiant D. red dwarfs / blue supergiant _____3. The actual 3D motion of stars relative to each other in a rotating a ...
Diapositiva 1
... M > 1.6M or B-V < 0.25-0.3: Little or no stellar activity No evidence of significant angular momentum loss There is no trend on rotation with age (vsin i ~ cte) M < 1.6M or B-V > 0.25-0.3: Stellar activity does not depend on age or rotation Very slow angular momentum loss. Braking ti ...
... M > 1.6M or B-V < 0.25-0.3: Little or no stellar activity No evidence of significant angular momentum loss There is no trend on rotation with age (vsin i ~ cte) M < 1.6M or B-V > 0.25-0.3: Stellar activity does not depend on age or rotation Very slow angular momentum loss. Braking ti ...
October 2013
... and is typical of areas where new stars can form. Between the Scorpion and the Centaur are the Altar, the Level and the Wolf, while to the east of the Milky Way stretches a great expanse of sky with relatively few bright stars, dominated by birds and 'water constellations'. In the south these includ ...
... and is typical of areas where new stars can form. Between the Scorpion and the Centaur are the Altar, the Level and the Wolf, while to the east of the Milky Way stretches a great expanse of sky with relatively few bright stars, dominated by birds and 'water constellations'. In the south these includ ...
How to Become a Planet Hunter-Careers in
... An interferometer combines the light from two or more small telescopes (Mersenne) to yield the angular resolution of a much larger telescope. Interferometer Resolution Interferometer ...
... An interferometer combines the light from two or more small telescopes (Mersenne) to yield the angular resolution of a much larger telescope. Interferometer Resolution Interferometer ...
The Life Cycle of Stars
... Nebula and other nebulae (stars in formation) on this page. Continue by reading up on Main Sequence Stars and find out how our sun compares in mass to other stars like Sirius, and Proxima Centauri. Based on its mass, will our sun be around for a while? Approximately how long before our sun consumes ...
... Nebula and other nebulae (stars in formation) on this page. Continue by reading up on Main Sequence Stars and find out how our sun compares in mass to other stars like Sirius, and Proxima Centauri. Based on its mass, will our sun be around for a while? Approximately how long before our sun consumes ...
The Brightness of Stars
... The surface area of a star is another factor in the brightness of a star Two stars of the same temperature will have different magnitudes, depending on their size A red supergiant can emit vastly more light than a red dwarf ...
... The surface area of a star is another factor in the brightness of a star Two stars of the same temperature will have different magnitudes, depending on their size A red supergiant can emit vastly more light than a red dwarf ...
Hertzsprung-Russell Diagram—key to understanding properties of stars. 26 Sept
... • You are a young astronomer in 1890, and you want to study stars. The distances to a few dozen stars are known. How do you attack this problem? • New developments in 1890 – Spectrometers analyze the colors of light – Photographic plates allow imaging of a large number of stars. ...
... • You are a young astronomer in 1890, and you want to study stars. The distances to a few dozen stars are known. How do you attack this problem? • New developments in 1890 – Spectrometers analyze the colors of light – Photographic plates allow imaging of a large number of stars. ...
Supplemental Resources - Morehead Planetarium and Science
... These are stars with just a fraction of the mass of our Sun (as low as 7.5% the mass of the Sun). They don’t burn as hot in their cores, and their surface temperature is about 3,500 Kelvin. The light released from their surface looks mostly red to our eyes (although there are different colors mixed ...
... These are stars with just a fraction of the mass of our Sun (as low as 7.5% the mass of the Sun). They don’t burn as hot in their cores, and their surface temperature is about 3,500 Kelvin. The light released from their surface looks mostly red to our eyes (although there are different colors mixed ...
Types of Stars http://space.about.com/od/stars/tp/What-Are
... Most stars we see in the night sky maintain a constant brightness (the twinkling we sometimes see is actually an atmospheric effect and not a variation of the star), but some stars actually do vary. While some stars owe their variation to their rotation (like rotating neutron stars, called pulsars) ...
... Most stars we see in the night sky maintain a constant brightness (the twinkling we sometimes see is actually an atmospheric effect and not a variation of the star), but some stars actually do vary. While some stars owe their variation to their rotation (like rotating neutron stars, called pulsars) ...
X-ray emission and the incidence of magnetic fields in the massive
... angle of the rotation axis, β is the angle between the magnetic axis and the rotation axis, φ is the rotational phase and B is the polar field strength. For each configuration, we calculated the reduced χ2 of the model fit to the observed LSD Stokes V profiles. Assuming that only the phase may chang ...
... angle of the rotation axis, β is the angle between the magnetic axis and the rotation axis, φ is the rotational phase and B is the polar field strength. For each configuration, we calculated the reduced χ2 of the model fit to the observed LSD Stokes V profiles. Assuming that only the phase may chang ...