The sun is a star. It is a huge, spinning, glowing sphere of hot gas
... hundreds to tens of thousands of miles across (many times larger that Earth). Scientists measure the total size (area) of all of the sunspots seen on the sun every day to get a measure of how active the sun is. Sunspots are not permanent. They appear and disappear on the surface of the sun. They are ...
... hundreds to tens of thousands of miles across (many times larger that Earth). Scientists measure the total size (area) of all of the sunspots seen on the sun every day to get a measure of how active the sun is. Sunspots are not permanent. They appear and disappear on the surface of the sun. They are ...
Penentuan Jarak dalam Astronomi II
... outer layers for a short while during the contraction phase and is released when the star is expanding This amplifies the contraction or departure from hydrostatic equilibrium in the outer layers Nuclear reactions go at a faster rate creating more radiative energy and hence more pressure halting the ...
... outer layers for a short while during the contraction phase and is released when the star is expanding This amplifies the contraction or departure from hydrostatic equilibrium in the outer layers Nuclear reactions go at a faster rate creating more radiative energy and hence more pressure halting the ...
Exercise 5
... 1. Plot the B-V color index (x-axis) versus the absolute brightness in visual magnitudes (y-axis) on standard graph paper. One weird thing: put 0 high up on the y-axis, and number sequentially downwards. Make sure you have room for the negative B-V values. Remember to label axes and title the graph. ...
... 1. Plot the B-V color index (x-axis) versus the absolute brightness in visual magnitudes (y-axis) on standard graph paper. One weird thing: put 0 high up on the y-axis, and number sequentially downwards. Make sure you have room for the negative B-V values. Remember to label axes and title the graph. ...
Final Study Guide Questions Earth Science Spring 2016 Mr. Traeger 1
... What is red shift? What is blue shift? What do they tell us? ...
... What is red shift? What is blue shift? What do they tell us? ...
Perseid Watch at Weiser State Forest August 12
... Doug grove – Observed 10-12 new galaxies in Leo and Virgo. Also observed M13, M51 and M57. Mike Snider – Observed cloud patterns on Venus using a narrow band blue filter at 400x. Mike also observed the Venus-Jupiter conjunction from Florida. He was able to see Ganymede with his naked eye. Dave Mitsk ...
... Doug grove – Observed 10-12 new galaxies in Leo and Virgo. Also observed M13, M51 and M57. Mike Snider – Observed cloud patterns on Venus using a narrow band blue filter at 400x. Mike also observed the Venus-Jupiter conjunction from Florida. He was able to see Ganymede with his naked eye. Dave Mitsk ...
Game Guide / Chronopticon
... representing mythological people, animals, and objects • Like the sun, any given star or constellation seems to move in an arc across the sky over the course of hours • Different constellations are visible during different times of year (or different seasons) • You can calculate elapsed time (hours) ...
... representing mythological people, animals, and objects • Like the sun, any given star or constellation seems to move in an arc across the sky over the course of hours • Different constellations are visible during different times of year (or different seasons) • You can calculate elapsed time (hours) ...
Nebulae - Innovative Teachers BG
... populated with relatively young hot stars. Interestingly here is that astronomers have observed two different disc-like objects - one of them located near the brightest stars in the cluster, and others not associated with visible stars. In the first case the star heats the gas and we observe a disc- ...
... populated with relatively young hot stars. Interestingly here is that astronomers have observed two different disc-like objects - one of them located near the brightest stars in the cluster, and others not associated with visible stars. In the first case the star heats the gas and we observe a disc- ...
Stellar Populations of Galaxies- 2 Lectures H
... The limit of the Balmer series and the blending of the high-order Balmer lines produces a discontinuity of the spectrum blueward of 3650°A. (the Balmer break) –more important in young populations, The break amplitude and position is a proxy for the age of the stellar population The UV continuum flux ...
... The limit of the Balmer series and the blending of the high-order Balmer lines produces a discontinuity of the spectrum blueward of 3650°A. (the Balmer break) –more important in young populations, The break amplitude and position is a proxy for the age of the stellar population The UV continuum flux ...
English Summary
... evolution is very short in comparison to the whole life of a star, it lasts only about 10 000 years. The nuclear reactions that have occurred in the interior of the star have resulted in a core of carbon and oxygen. The core of the star is not sufficiently hot to ignite nuclear reactions to transfor ...
... evolution is very short in comparison to the whole life of a star, it lasts only about 10 000 years. The nuclear reactions that have occurred in the interior of the star have resulted in a core of carbon and oxygen. The core of the star is not sufficiently hot to ignite nuclear reactions to transfor ...
r*=13.6 km MPA1 EOS
... Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation for ray-tracing. We include a scattered light contribution, which accounts for flux scattered off an equatorial accretion disk to the observer including time delays in the scattered light. We g ...
... Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation for ray-tracing. We include a scattered light contribution, which accounts for flux scattered off an equatorial accretion disk to the observer including time delays in the scattered light. We g ...
a MS Word version.
... star points usually seen on an HR Diagram. How do we know that sequences listed as "giant..." are plotting actual giant stars? Same question for "dwarf..."? ...
... star points usually seen on an HR Diagram. How do we know that sequences listed as "giant..." are plotting actual giant stars? Same question for "dwarf..."? ...
Description of Pictures In the Dome
... of Orion's Belt. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. Older texts frequently ...
... of Orion's Belt. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. Older texts frequently ...
Cosmic Dawn A Hunting for the First Stars in the Universe
... Typically we measure redshifts by comparing a whole suite of lines measured in the lab with the astronomical spectrum, to see that their wavelengths are all boosted by the same factor of (1+z). Because we live in an expanding universe, each object’s recession velocity (and hence its redshift) is pro ...
... Typically we measure redshifts by comparing a whole suite of lines measured in the lab with the astronomical spectrum, to see that their wavelengths are all boosted by the same factor of (1+z). Because we live in an expanding universe, each object’s recession velocity (and hence its redshift) is pro ...
day10spectral_analysi+
... of the peak of the emission shifts to shorter wavelength (which has higher frequency). At several hundred degrees, objects emit some visible light, and the emission spreads across the spectrum toward the blue, as the temperature increases. ...
... of the peak of the emission shifts to shorter wavelength (which has higher frequency). At several hundred degrees, objects emit some visible light, and the emission spreads across the spectrum toward the blue, as the temperature increases. ...
sachkov_2013 - Putting A Stars into Context
... continuous ground based, continuous space based) ...
... continuous ground based, continuous space based) ...
λ max T = 2.898 x 10 -3
... 3. As the temperature increases λmax moves to the left towards higher frequency. 4. At higher temperatures there is a sharp falling off of radiation at values greater than λmax towards a limiting value in the ultraviolet range which is of very short wavelength but not zero. This is referred to as th ...
... 3. As the temperature increases λmax moves to the left towards higher frequency. 4. At higher temperatures there is a sharp falling off of radiation at values greater than λmax towards a limiting value in the ultraviolet range which is of very short wavelength but not zero. This is referred to as th ...
The Search for Another Earth
... star. Because of the brightness of the star, a planet orbiting it is very difficult to see even with a sufficiently large telescope. Another reason is the wave nature of light. If the apparent separation of the star and the planet is too small, the planet cannot be resolved due to the limitation of the ...
... star. Because of the brightness of the star, a planet orbiting it is very difficult to see even with a sufficiently large telescope. Another reason is the wave nature of light. If the apparent separation of the star and the planet is too small, the planet cannot be resolved due to the limitation of the ...
Number of planets - Associazione Astrofili "Crab Nebula"
... HD 188753 Ab – This was the first exoplanet discovered in a multiple stellar system (three stars). HD 209458 b e HD 189733b – The first exoplanets whose spectrum was analyzed by direct observation. Gliese 581 c – This planet seems likely to harbour liquid water on its surface – a basic requirement f ...
... HD 188753 Ab – This was the first exoplanet discovered in a multiple stellar system (three stars). HD 209458 b e HD 189733b – The first exoplanets whose spectrum was analyzed by direct observation. Gliese 581 c – This planet seems likely to harbour liquid water on its surface – a basic requirement f ...
Lecture 1
... Definition of a planet Simplest definition is based solely on mass • Stars: burn hydrogen • Brown dwarfs: burn deuterium • Planets: do not burn deuterium Deuterium burning limit occurs at around 13 Jupiter masses ...
... Definition of a planet Simplest definition is based solely on mass • Stars: burn hydrogen • Brown dwarfs: burn deuterium • Planets: do not burn deuterium Deuterium burning limit occurs at around 13 Jupiter masses ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.