The Night Sky
... comet (KOM-it): a small space object made up of snow, ice, and dust constellations (KAHN-stuh-LAY-shunz): stars that, when grouped together, make a picture galaxy (GAL-uhk-see): a large group of stars, gas, and dust held together by gravity lunar eclipse (LOO-nur i-KLIPS): a partial or ...
... comet (KOM-it): a small space object made up of snow, ice, and dust constellations (KAHN-stuh-LAY-shunz): stars that, when grouped together, make a picture galaxy (GAL-uhk-see): a large group of stars, gas, and dust held together by gravity lunar eclipse (LOO-nur i-KLIPS): a partial or ...
Lecture 1, PPT version
... • What makes a good “theory”? • Does the scientific method have an endpoint? Why or why not? • In what way is astronomy a “passive” science compared to other sciences (e.g., chemistry, biology)? ...
... • What makes a good “theory”? • Does the scientific method have an endpoint? Why or why not? • In what way is astronomy a “passive” science compared to other sciences (e.g., chemistry, biology)? ...
Journey Through the Universe By Brian Fontaine
... It is believed that our solar system began similar to a galaxy…(or a hurricane). A cloud of gas (nebula) collapsed to form the sun, which began rotating. As time when on, the heavier dust fell toward the sun, creating the rocky inner planets, and the ...
... It is believed that our solar system began similar to a galaxy…(or a hurricane). A cloud of gas (nebula) collapsed to form the sun, which began rotating. As time when on, the heavier dust fell toward the sun, creating the rocky inner planets, and the ...
Supernovae — Oct 21 10/21/2011 • Outline
... Pressure on the walls of the box is caused by the gas hitting the walls. Gas transfers momentum to the walls. Mental picture: Marbles hit the walls; wall pushes back. ...
... Pressure on the walls of the box is caused by the gas hitting the walls. Gas transfers momentum to the walls. Mental picture: Marbles hit the walls; wall pushes back. ...
Open access - ORBi
... cold dust and hot dust for solar-type stars. Another interesting result is the difference in hot exozodi occurence rate between A-type stars and solar-type stars. In order to explore these correlations in a unbiased manner, we want to define a sample such that: • the dusty and non-dusty sub-samples ha ...
... cold dust and hot dust for solar-type stars. Another interesting result is the difference in hot exozodi occurence rate between A-type stars and solar-type stars. In order to explore these correlations in a unbiased manner, we want to define a sample such that: • the dusty and non-dusty sub-samples ha ...
Vampy Astronomy Syllabus
... Observation Expectations: We will have late night observations at off-campus settings. Here a few expectations for those trips: 1. You are expected to leave the site as you found it. Any trash must be picked up and disposed of properly. 2. You are expected NEVER to shine a light in anyone’s eyes. On ...
... Observation Expectations: We will have late night observations at off-campus settings. Here a few expectations for those trips: 1. You are expected to leave the site as you found it. Any trash must be picked up and disposed of properly. 2. You are expected NEVER to shine a light in anyone’s eyes. On ...
To get level
... Used correct units where appropriate. Used most key words correctly. Written your ideas in all your own words, using proper sentences. Used at least two sources of information to find out about the life cycle of a star. ...
... Used correct units where appropriate. Used most key words correctly. Written your ideas in all your own words, using proper sentences. Used at least two sources of information to find out about the life cycle of a star. ...
3.2 Spectra and Spectral Classification
... (a) absolute magnitude or luminosity and (b) spectral type or effective temperature (sometimes also color index) That means there exist different forms of this diagram, usually ● log L versus spectral type ● log L versus log T ● M versus B-V ...
... (a) absolute magnitude or luminosity and (b) spectral type or effective temperature (sometimes also color index) That means there exist different forms of this diagram, usually ● log L versus spectral type ● log L versus log T ● M versus B-V ...
File
... parallax method of distance measurement only works for “near” stars. A special type of pulsating stars, Cepheid variables, has an absolute brightness correlated to its pulsation period, which can be used to determine distance. Much of the analysis of Cepheid variable stars was performed by American ...
... parallax method of distance measurement only works for “near” stars. A special type of pulsating stars, Cepheid variables, has an absolute brightness correlated to its pulsation period, which can be used to determine distance. Much of the analysis of Cepheid variable stars was performed by American ...
27 September: Inside the Sun
... How can we know the structure of the Sun below the photosphere? • Application of the laws of physics (equations of stellar structure), find solution consistent with mass and radius of Sun • Measure “eigenmodes” of the Sun (see how fast it jiggles) • Results for how the sun is put together ...
... How can we know the structure of the Sun below the photosphere? • Application of the laws of physics (equations of stellar structure), find solution consistent with mass and radius of Sun • Measure “eigenmodes” of the Sun (see how fast it jiggles) • Results for how the sun is put together ...
Star - University of Pittsburgh
... This causes celestial bodies (i.e., sun, stars, planets) to appear to rise and set approximately once each day when observed from moderate latitudes. Gives rise to concept of Celestial sphere. Two points, the South and North celestial poles, do not "move". Celestial sphere: Imaginary sphere on which ...
... This causes celestial bodies (i.e., sun, stars, planets) to appear to rise and set approximately once each day when observed from moderate latitudes. Gives rise to concept of Celestial sphere. Two points, the South and North celestial poles, do not "move". Celestial sphere: Imaginary sphere on which ...
AST1100 Lecture Notes
... the dark spots were turned towards us, the star appeared fainter, when the spots were turned away from us, the star appeared brighter. Today we know that these periodic variations in the star’s magnitude is due to pulsations. The star is pulsating and therefore periodically changing its radius and s ...
... the dark spots were turned towards us, the star appeared fainter, when the spots were turned away from us, the star appeared brighter. Today we know that these periodic variations in the star’s magnitude is due to pulsations. The star is pulsating and therefore periodically changing its radius and s ...
Name:
... temperature. Note, too, that the luminosity is in terms of solar luminosities (Lo). That is, if a star has a luminosity of 10Lo, it will be ten times brighter than our sun. The temperature is given in Kelvins (K), a temperature scale very similar to the Celsius scale with a different zero point. Kel ...
... temperature. Note, too, that the luminosity is in terms of solar luminosities (Lo). That is, if a star has a luminosity of 10Lo, it will be ten times brighter than our sun. The temperature is given in Kelvins (K), a temperature scale very similar to the Celsius scale with a different zero point. Kel ...
astronomy 161 - Ohio State Astronomy
... (3) The celestial sphere appears to rotate about the celestial poles (1 day cycle) Observation: Stars, Sun, Moon and planets move in counterclockwise circles around north (south) celestial pole. Objects near the celestial equator move east to west when above the horizon (“rising” in east, “setting” ...
... (3) The celestial sphere appears to rotate about the celestial poles (1 day cycle) Observation: Stars, Sun, Moon and planets move in counterclockwise circles around north (south) celestial pole. Objects near the celestial equator move east to west when above the horizon (“rising” in east, “setting” ...
Herbig Ae/Be Stars
... The negative sign indicates that a decrease in the total stellar energy results in positive luminosity • By the virial theorem half of the gravitational potential energy is converted into thermal energy and half is radiated ...
... The negative sign indicates that a decrease in the total stellar energy results in positive luminosity • By the virial theorem half of the gravitational potential energy is converted into thermal energy and half is radiated ...
13.5 The HR Diagram By the early 1900s, astronomers had learned
... Our study of the HR diagram shows us that most stars fall nicely into one of three regions in the diagram: mainsequence stars, giants, or white dwarfs. Stars in the giant region of the diagram follow no obvious trends as a function of mass or other properties, and neither do the white dwarfs, alth ...
... Our study of the HR diagram shows us that most stars fall nicely into one of three regions in the diagram: mainsequence stars, giants, or white dwarfs. Stars in the giant region of the diagram follow no obvious trends as a function of mass or other properties, and neither do the white dwarfs, alth ...
Astronomical Imaging: Overview
... – Earth rotates “counterclockwise” seen from above north pole, towards the east – Sky appears to move from east to west ...
... – Earth rotates “counterclockwise” seen from above north pole, towards the east – Sky appears to move from east to west ...
Teachers` Manual - Amundsen High School
... Sun's path across the sky changes with seasons The Ecliptic: The sun path across the background sky. High in Summer, low in winter Stars visible near Sun before dawn and after dusk change during year. Sun's shifts its position on celestial sphere with respect to the stars Sun's path = Eclipt ...
... Sun's path across the sky changes with seasons The Ecliptic: The sun path across the background sky. High in Summer, low in winter Stars visible near Sun before dawn and after dusk change during year. Sun's shifts its position on celestial sphere with respect to the stars Sun's path = Eclipt ...
The masses of stars
... Thus most easily measured quantities of a star’s brightness at different colours enable us to characterise it in terms of its surface temperature (T) and luminosity (L), which are related to one another through the radius of the star. If we want to understand more about the differences between star ...
... Thus most easily measured quantities of a star’s brightness at different colours enable us to characterise it in terms of its surface temperature (T) and luminosity (L), which are related to one another through the radius of the star. If we want to understand more about the differences between star ...
Perseids meteor showers are looking good
... The dimmest stars that we can still see with our naked eyes have an apparent magnitude of about 6 m. 7. Take a guess about the range of apparent magnitude for some Perseid’s fireballs. ...
... The dimmest stars that we can still see with our naked eyes have an apparent magnitude of about 6 m. 7. Take a guess about the range of apparent magnitude for some Perseid’s fireballs. ...
Spiral galaxies: Spiral galaxies: Inclination Spiral galaxies: Internal
... • In denser regions of the ISM, collisions between atoms become frequent enough to form molecules. • The most common molecule is H2, but since H2 is a symmetric molecule, it has no rotational quantum transitions. It is therefore extremely difficult to detect. • As a tracer of H2, astronomers usually ...
... • In denser regions of the ISM, collisions between atoms become frequent enough to form molecules. • The most common molecule is H2, but since H2 is a symmetric molecule, it has no rotational quantum transitions. It is therefore extremely difficult to detect. • As a tracer of H2, astronomers usually ...
Lookback Time in Our Everyday Lives
... We use the Astronomical Unit as our unit of length for measuring distances in the Solar System. However, because stellar distances are so large, astronomers use another unit of length, the light-year (ly). The light-year is defined as the distance light travels in one year, 9.46 trillion kilometers ...
... We use the Astronomical Unit as our unit of length for measuring distances in the Solar System. However, because stellar distances are so large, astronomers use another unit of length, the light-year (ly). The light-year is defined as the distance light travels in one year, 9.46 trillion kilometers ...
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.