PowerPoint Presentation - ASTR498E High energy
... Find a star cluster so that you know that all stars are at approximately the same distance from Earth Measure apparent magnitude and colors of the stars Plot these two quantities against each other This is a Hertzsprung-Russell diagram ...
... Find a star cluster so that you know that all stars are at approximately the same distance from Earth Measure apparent magnitude and colors of the stars Plot these two quantities against each other This is a Hertzsprung-Russell diagram ...
Mission update
... correct for atmospheric effects, but this limits observations to parts of the sky that are near bright stars. ESO’s artificial star means that astronomers are no longer limited in this way. The high-power laser beam originates from a launching telescope on Yepun, the fourth 8.2 m Unit Telescope of t ...
... correct for atmospheric effects, but this limits observations to parts of the sky that are near bright stars. ESO’s artificial star means that astronomers are no longer limited in this way. The high-power laser beam originates from a launching telescope on Yepun, the fourth 8.2 m Unit Telescope of t ...
Section 7.3 - CPO Science
... travels through space in one year. • A light year is a unit of distance, not time. ...
... travels through space in one year. • A light year is a unit of distance, not time. ...
Ch16: The Milky Way
... us mass within Sun’s orbit: 1.0 x 1011 MSun The total amount of light suggests ~ few x 109 Msun Dark matter! ...
... us mass within Sun’s orbit: 1.0 x 1011 MSun The total amount of light suggests ~ few x 109 Msun Dark matter! ...
Ch2a
... days which is slightly less than 1 degree per day actually 0.98 degrees/day. Now, the Earth also spins on it’s axis 360 degrees in 24 hours which works out to be 15 degrees per hour, or 15 degrees/60 min = 0.25 degrees/minute. So, if you want to see the stars in exactly the same place in the sky as ...
... days which is slightly less than 1 degree per day actually 0.98 degrees/day. Now, the Earth also spins on it’s axis 360 degrees in 24 hours which works out to be 15 degrees per hour, or 15 degrees/60 min = 0.25 degrees/minute. So, if you want to see the stars in exactly the same place in the sky as ...
The Night Sky
... A star is a massive luminous sphere of plasma, held together by its own gravity. Hot enough to sustain nuclear fusions and thus produce radiant energy. Other Stars: Betelgeuse-A star 600 times our sun. A dying star likely to go super nova. The Sun- The star at the center of our Solar System. Sustain ...
... A star is a massive luminous sphere of plasma, held together by its own gravity. Hot enough to sustain nuclear fusions and thus produce radiant energy. Other Stars: Betelgeuse-A star 600 times our sun. A dying star likely to go super nova. The Sun- The star at the center of our Solar System. Sustain ...
AST121 Introduction to Astronomy
... – stars are too close together to be resolved with a telescope – one set of absorption lines are too faint to be seen – analyze doppler shift in the aborption lines of one star, thus measuring its “wobble” and then calculate the properties of the ...
... – stars are too close together to be resolved with a telescope – one set of absorption lines are too faint to be seen – analyze doppler shift in the aborption lines of one star, thus measuring its “wobble” and then calculate the properties of the ...
It is evident from our observations of impact craters on planets and
... have increased our ability to use the stellar parallax method out to nearly 1000 parsecs. The presence of spectral features and dominance of certain lines is closely linked to surface temperature and conditions in the stellar atmosphere. Astronomers have based a classification system for stars based ...
... have increased our ability to use the stellar parallax method out to nearly 1000 parsecs. The presence of spectral features and dominance of certain lines is closely linked to surface temperature and conditions in the stellar atmosphere. Astronomers have based a classification system for stars based ...
The Hertzsprung-Russell Diagram
... Astronomers reasoned that if a star were hotter, it should have a higher luminosity, and a cooler star would be dimmer. As it turns out, most stars fit this pattern. They can be found on the HR Diagram in the large group that stretches across the middle of the diagram. These are called the Main Sequ ...
... Astronomers reasoned that if a star were hotter, it should have a higher luminosity, and a cooler star would be dimmer. As it turns out, most stars fit this pattern. They can be found on the HR Diagram in the large group that stretches across the middle of the diagram. These are called the Main Sequ ...
Starlight (conclusion)
... • Continuous spectrum gives surface temperature (Wien’s Law) • Spectral lines give chemical composition, temperature (also), speed of rotation (How?) and other properties • Examples of stellar spectra (Figure 16.11)…what can we say? ...
... • Continuous spectrum gives surface temperature (Wien’s Law) • Spectral lines give chemical composition, temperature (also), speed of rotation (How?) and other properties • Examples of stellar spectra (Figure 16.11)…what can we say? ...
Summer 2001 Day 07: Intro to Solar System
... ii) In the solar neighborhood 1 parsec is about the average distance between stars iii) 1 parsec = 3.26 ly = 3.09x1013 km = 206,137 AU (1) Analogy: if an AU was a foot, a parsec would be 39 miles (2) Analogy: if an Au was a foot, the Solar System would fit in a 40-foot circle (i.e. within the confin ...
... ii) In the solar neighborhood 1 parsec is about the average distance between stars iii) 1 parsec = 3.26 ly = 3.09x1013 km = 206,137 AU (1) Analogy: if an AU was a foot, a parsec would be 39 miles (2) Analogy: if an Au was a foot, the Solar System would fit in a 40-foot circle (i.e. within the confin ...
09astrophysics_2007Nov
... 2b. Absolute Magnitude “M” •Absolute Magnitude: how bright the would be if viewed at standard distance •Standard Distance: is 10 parsecs •Sun is M=+4.83 •Star with 100 Solar Luminosities (100 x brighter than sun) would be 5 magnitudes brighter, or have absolute magnitude of M= -0.17 ...
... 2b. Absolute Magnitude “M” •Absolute Magnitude: how bright the would be if viewed at standard distance •Standard Distance: is 10 parsecs •Sun is M=+4.83 •Star with 100 Solar Luminosities (100 x brighter than sun) would be 5 magnitudes brighter, or have absolute magnitude of M= -0.17 ...
Astronomy Quiz #1 Answers
... -this means that the wave lengths facing us/toward us are longer (like colour red), showing stars are moving away from us/each other -diagram should be of 2 visible spectra with lines; first one is the original, second one should show that they shifted towards the red end of the spectrum a. What doe ...
... -this means that the wave lengths facing us/toward us are longer (like colour red), showing stars are moving away from us/each other -diagram should be of 2 visible spectra with lines; first one is the original, second one should show that they shifted towards the red end of the spectrum a. What doe ...
Day-7
... 1st Quarter night – Mon. 9/21 -7:30pm – on campus Exam 1: Fri. Sept. 18 or Mon. Sept. 21 ...
... 1st Quarter night – Mon. 9/21 -7:30pm – on campus Exam 1: Fri. Sept. 18 or Mon. Sept. 21 ...
Main Sequence Star
... Reber- 1911• Built the first radio telescope Collects radio waves from space Can be used at anytime or weather ...
... Reber- 1911• Built the first radio telescope Collects radio waves from space Can be used at anytime or weather ...
Stars
... Life Cycle of Stars • The matter inside the star will be compressed so tightly that its atoms are compacted into a dense shell of neutrons. If the remaining mass of the star is more than about three times that of the Sun, it will collapse so completely that it will literally disappear from the univ ...
... Life Cycle of Stars • The matter inside the star will be compressed so tightly that its atoms are compacted into a dense shell of neutrons. If the remaining mass of the star is more than about three times that of the Sun, it will collapse so completely that it will literally disappear from the univ ...
Stars - Haag
... The brightness of stars from earth is known as its apparent magnitude. This depends on size and energy output ...
... The brightness of stars from earth is known as its apparent magnitude. This depends on size and energy output ...
Name _________ Date _____________ Period ______ Skills
... _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ 11. How is an absorption spectrum produced? _______________________________________________________________ ...
... _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ 11. How is an absorption spectrum produced? _______________________________________________________________ ...
Barred Spiral Galaxy
... • Large amounts of electrically charged gas are ejected suddenly from the Sun’s corona. ...
... • Large amounts of electrically charged gas are ejected suddenly from the Sun’s corona. ...
File
... Example: The first star to be measured this way was a star in the constellation of Cygnus. The angular difference was found to be 0.292 arcseconds. This gives a distance of 3.48 pc, or 11.36 light years ...
... Example: The first star to be measured this way was a star in the constellation of Cygnus. The angular difference was found to be 0.292 arcseconds. This gives a distance of 3.48 pc, or 11.36 light years ...
No Slide Title
... becomes so dense it collapses in on itself, becoming a single point of zero size! Its gravity is so strong that even light cannot escape from inside a certain boundary - the EVENT HORIZON. The star is now a BLACK HOLE ! Although we will never actually SEE a black hole, we can see their effects. A nu ...
... becomes so dense it collapses in on itself, becoming a single point of zero size! Its gravity is so strong that even light cannot escape from inside a certain boundary - the EVENT HORIZON. The star is now a BLACK HOLE ! Although we will never actually SEE a black hole, we can see their effects. A nu ...
H-R Diagram - SFA Physics
... Now plot all the stars from Table 7 onto Figure 3. Table 7 is a list of the 30 stars nearest the sun and the majority of these stars are considered to be the most common types of stars in the galaxy. Transfer the main sequence curve from Figure 1 to Figure 3. ...
... Now plot all the stars from Table 7 onto Figure 3. Table 7 is a list of the 30 stars nearest the sun and the majority of these stars are considered to be the most common types of stars in the galaxy. Transfer the main sequence curve from Figure 1 to Figure 3. ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.