Shattering geocentric, anthrocentric worldviews since 1543
... Galileo was forced to recant and placed under house arrest. Many others picked their words carefully to avoid a similar fate ...
... Galileo was forced to recant and placed under house arrest. Many others picked their words carefully to avoid a similar fate ...
The Sun and other Stars
... the same time, but independently of each other. H-R Diagram – ____________________________ Most stars lie along a diagonal line called the ______ ...
... the same time, but independently of each other. H-R Diagram – ____________________________ Most stars lie along a diagonal line called the ______ ...
Bluffing your way in Astronomy: Taurus
... 100 million years old, old enough to have blown away any such residue, so we are actually seeing part of a cloud of interstellar dust and gas, called the Taurus Dark Cloud, which by coincidence lies between us and the cluster. The Pleiades are about 380 light years from Earth. Most of the stars in t ...
... 100 million years old, old enough to have blown away any such residue, so we are actually seeing part of a cloud of interstellar dust and gas, called the Taurus Dark Cloud, which by coincidence lies between us and the cluster. The Pleiades are about 380 light years from Earth. Most of the stars in t ...
Compact Telescope for Free Space Communications
... The system also required positioning of the focal plain behind the primary mirror, and diffraction limited performance. Two standard types of telescopes were considered for this application: Cassegrain and Gregorian. Unfortunately, while each of these systems has its own advantages, they also have s ...
... The system also required positioning of the focal plain behind the primary mirror, and diffraction limited performance. Two standard types of telescopes were considered for this application: Cassegrain and Gregorian. Unfortunately, while each of these systems has its own advantages, they also have s ...
1-structure-of-the-universe-and-the-big-bang
... C) shift toward the blue end of the spectrum D) shift toward the red end of the spectrum 17. In a Doppler red shift, the observed wavelengths of light from distant celestial objects appear closer to the red end of the spectrum than light from similar nearby celestial objects. The explanation for the ...
... C) shift toward the blue end of the spectrum D) shift toward the red end of the spectrum 17. In a Doppler red shift, the observed wavelengths of light from distant celestial objects appear closer to the red end of the spectrum than light from similar nearby celestial objects. The explanation for the ...
Stellar Nebulae
... galaxies, reaching up to 300 light years in diameter. They contain enough dense gas and dust to form hundreds of thousands of Sun-like stars. These stars are formed in the densest parts of the clouds. Molecular clouds are very cold, having temperatures ranging from about -440 to -370 degrees Fahrenh ...
... galaxies, reaching up to 300 light years in diameter. They contain enough dense gas and dust to form hundreds of thousands of Sun-like stars. These stars are formed in the densest parts of the clouds. Molecular clouds are very cold, having temperatures ranging from about -440 to -370 degrees Fahrenh ...
03 Telescopes - Physics and Astronomy
... One advantage of the Hubble Space telescope over ground based ones is that A. it can better focus x-ray images. B. in orbit, it can operate close to its diffraction limit at visible wavelengths. C. it is larger than any Earth-based scopes. D. its adaptive optics controls atmospheric blurring better. ...
... One advantage of the Hubble Space telescope over ground based ones is that A. it can better focus x-ray images. B. in orbit, it can operate close to its diffraction limit at visible wavelengths. C. it is larger than any Earth-based scopes. D. its adaptive optics controls atmospheric blurring better. ...
Constellations and Distances to Stars
... solar system is to measure parallax. • Parallax is the apparent shift in the position of an object when viewed from two different positions. ...
... solar system is to measure parallax. • Parallax is the apparent shift in the position of an object when viewed from two different positions. ...
Chapter 34: Cosmology FYI 1. Radar Ranging 2. Triangulation idea
... P4: Consider light observed on earth that was emitted by atoms moving with stars or galaxies. Which statements are true? a. You can actually see little red atoms that have been shifted to the left. They have small beady red eyes and cannot be trusted. b. The spectral colors emitted by the atoms movi ...
... P4: Consider light observed on earth that was emitted by atoms moving with stars or galaxies. Which statements are true? a. You can actually see little red atoms that have been shifted to the left. They have small beady red eyes and cannot be trusted. b. The spectral colors emitted by the atoms movi ...
Cosmochemistry from Nanometers to Light- Years A Written by
... other primitive materials that formed in the solar nebula before the planets formed. We have known for a long time that the CAIs were the oldest solids to form in the solar nebula, but it was not clear if chondrules formed at the same time, or later, and if later, how much later? Age-dating wizards ...
... other primitive materials that formed in the solar nebula before the planets formed. We have known for a long time that the CAIs were the oldest solids to form in the solar nebula, but it was not clear if chondrules formed at the same time, or later, and if later, how much later? Age-dating wizards ...
Comet Observers Club Chair
... famous Bayeux Tapestry, which commemorates the Norman Conquest of England in 1066, depicts an apparition of Comet Halley. As of 1995, 878 comets have been cataloged and their orbits at least roughly calculated. Of these, 184 are periodic comets (orbital periods less than 200 years); some of the rema ...
... famous Bayeux Tapestry, which commemorates the Norman Conquest of England in 1066, depicts an apparition of Comet Halley. As of 1995, 878 comets have been cataloged and their orbits at least roughly calculated. Of these, 184 are periodic comets (orbital periods less than 200 years); some of the rema ...
Toward a revival of Stellar Intensity Interferometry
... matching the pixel size. The finite size of the point-spread function makes it impossible to avoid also having some amount of night sky background (NSB) light polluting the star light. If 40% of the collected light is not coming from the star, the time necessary to attain a given significance for th ...
... matching the pixel size. The finite size of the point-spread function makes it impossible to avoid also having some amount of night sky background (NSB) light polluting the star light. If 40% of the collected light is not coming from the star, the time necessary to attain a given significance for th ...
Teaching astrophysics in VCE Physics
... $ If we know the brightness (apparent) and the distance, we can figure out the actual or intrinsic brightness of the star (from the inverse square law). This is normally called the luminosity of the star and is measured in watts. It is basically the power output of the star! But how do we measure th ...
... $ If we know the brightness (apparent) and the distance, we can figure out the actual or intrinsic brightness of the star (from the inverse square law). This is normally called the luminosity of the star and is measured in watts. It is basically the power output of the star! But how do we measure th ...
of the Sun
... original, hot matter of the Universe A uniform, faint microwave signal all over the sky ...
... original, hot matter of the Universe A uniform, faint microwave signal all over the sky ...
Chapter 19. Mapping the Universe from Herschel to Sloan
... The key to understanding the nature of galaxies was to get their distances. In the mid1920’s telescopes were able to resolve individual stars in the closest galaxies, such as M31 (Andromeda Galaxy) and M33, but the star were too faint to obtain spectra which could be classified. Therefore, we did no ...
... The key to understanding the nature of galaxies was to get their distances. In the mid1920’s telescopes were able to resolve individual stars in the closest galaxies, such as M31 (Andromeda Galaxy) and M33, but the star were too faint to obtain spectra which could be classified. Therefore, we did no ...
Are there Earth-like planets around other stars?
... stars, and so forth. But this does not necessarily mean that even Earth-like planets are rare in the Universe. We just need to look for them with other methods. The main difficulty in detecting Earth-like exoplanets around distant stars is that Earth is small (so its light is obscured by the light o ...
... stars, and so forth. But this does not necessarily mean that even Earth-like planets are rare in the Universe. We just need to look for them with other methods. The main difficulty in detecting Earth-like exoplanets around distant stars is that Earth is small (so its light is obscured by the light o ...
Extra-Solar Planets
... Searching for Earth-like planets The smallest planet found so far has a mass of about 2 Earth masses. A 5 Earth mass planet appears to be near the edge-on of the habitable zone, so it could have liquid water on its surface. The next step is to search for evidence of life on this planet (e.g., oxyge ...
... Searching for Earth-like planets The smallest planet found so far has a mass of about 2 Earth masses. A 5 Earth mass planet appears to be near the edge-on of the habitable zone, so it could have liquid water on its surface. The next step is to search for evidence of life on this planet (e.g., oxyge ...
... groups. The creation of a new species from a pre-existing species – “speciation” as it is called - generally requires thousands of years. Hence, in our entire lifetime we can witness only a tiny part of the speciation process. How is it possible for one species to give rise to more than one subseque ...
"Stars" pdf file
... This is why stars have very large masses. The sun’s diameter is 1,4 million km long, 100 times more than the earth’s. But the sun is an average star. Star diameters range from a few hundredths to hundreds of times the solar one. Yet even star dimensions, no matter how large, are small compared to th ...
... This is why stars have very large masses. The sun’s diameter is 1,4 million km long, 100 times more than the earth’s. But the sun is an average star. Star diameters range from a few hundredths to hundreds of times the solar one. Yet even star dimensions, no matter how large, are small compared to th ...
Skyward April 2016 A Penumbral eclipse of the Moon I have now
... Shoemaker discovered a comet on those images. Subsequently named Shoemaker-Levy 9, this particular comet, whizzing through space at 140,000 miles per hour, collided with Jupiter in 1994, giving humanity’s first vision of an encounter between two large solar system objects. Perhaps it was another cos ...
... Shoemaker discovered a comet on those images. Subsequently named Shoemaker-Levy 9, this particular comet, whizzing through space at 140,000 miles per hour, collided with Jupiter in 1994, giving humanity’s first vision of an encounter between two large solar system objects. Perhaps it was another cos ...
SALTeNEWS_9
... Many of the SALT operations staff, particularly the technical support staff, have already been appointed and are working alongside the SALT Project Team at Sutherland. This is a mutually beneficial situation in which maximum knowledge transfer from the construction team to the operations team can ta ...
... Many of the SALT operations staff, particularly the technical support staff, have already been appointed and are working alongside the SALT Project Team at Sutherland. This is a mutually beneficial situation in which maximum knowledge transfer from the construction team to the operations team can ta ...
RTF - Cosmic Adventures Traveling Planetarium
... has instruments that use some of these types of light for imaging. [Show the slide of the electromagnetic spectrum in the How_Do_We_Know folder and briefly discuss the relationship between wavelength and energy level.] IV. Some HST Discoveries (15 to 20 minutes) A) One of the main tasks of the HST i ...
... has instruments that use some of these types of light for imaging. [Show the slide of the electromagnetic spectrum in the How_Do_We_Know folder and briefly discuss the relationship between wavelength and energy level.] IV. Some HST Discoveries (15 to 20 minutes) A) One of the main tasks of the HST i ...
Determination of spiral orbits with constant tangential velocity
... The green line shows the expected speed according to Newton, which decreases towards the outside, and the gray-dashed line the decrease very close to the center. Near to the center, the measured velocity agrees really well with the calculation. However, for greater distances from the center a surpri ...
... The green line shows the expected speed according to Newton, which decreases towards the outside, and the gray-dashed line the decrease very close to the center. Near to the center, the measured velocity agrees really well with the calculation. However, for greater distances from the center a surpri ...
PSU/TCfA search for planets around evolved stars
... A basic tool to study the origin of RV variations derived on stellar spectra is the analysis of the shapes of spectral lines via line bisectors (Gray, 1983). We computed line bisectors for 5 strong, unblended spectral features of a moderate intensity, which were located close to the center of Echell ...
... A basic tool to study the origin of RV variations derived on stellar spectra is the analysis of the shapes of spectral lines via line bisectors (Gray, 1983). We computed line bisectors for 5 strong, unblended spectral features of a moderate intensity, which were located close to the center of Echell ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.