Testing
... Atomic hydrogen gas forms as hot gas cools, allowing electrons to join with protons. We can observe atomic hydrogen via the 21 cm emission line (with radio telescopes). Molecular clouds form next, after gas cools enough to allow atoms to combine into molecules. We can trace the presence of molecula ...
... Atomic hydrogen gas forms as hot gas cools, allowing electrons to join with protons. We can observe atomic hydrogen via the 21 cm emission line (with radio telescopes). Molecular clouds form next, after gas cools enough to allow atoms to combine into molecules. We can trace the presence of molecula ...
1. Chapter 10
... a large ocean. If you and your neighbours had little ability to travel far from the island, your knowledge of the ocean and what lay beyond the horizon would be limited. You might come to understand the behaviour of the sea life on your island’s shores and to notice patterns in the objects in the ni ...
... a large ocean. If you and your neighbours had little ability to travel far from the island, your knowledge of the ocean and what lay beyond the horizon would be limited. You might come to understand the behaviour of the sea life on your island’s shores and to notice patterns in the objects in the ni ...
Stellar Magnitudes and Distances
... • the direction and speed a star is moving • its mass • its brightness or luminosity • its chemical composition • its size • its age • its temperature ...
... • the direction and speed a star is moving • its mass • its brightness or luminosity • its chemical composition • its size • its age • its temperature ...
The Distances to the Stars
... Note that measuring such motions requires the existence of a fixed reference frame, provided by celestial objects whose motions are not detectable. Usually very distant stars will do, but for the most accurate astrometry astronomers use distant galaxies or quasars as reference points. Two thousand y ...
... Note that measuring such motions requires the existence of a fixed reference frame, provided by celestial objects whose motions are not detectable. Usually very distant stars will do, but for the most accurate astrometry astronomers use distant galaxies or quasars as reference points. Two thousand y ...
physics experiments
... 2. Focus the telescope for parallel light using a distant object. There should be no parallax between the image seen in the telescope and the crosswires seen through the eyepiece. 3. Place the sodium lamp in front of the collimator. 4. Level the turntable of the spectrometer if necessary. 5. Looking ...
... 2. Focus the telescope for parallel light using a distant object. There should be no parallax between the image seen in the telescope and the crosswires seen through the eyepiece. 3. Place the sodium lamp in front of the collimator. 4. Level the turntable of the spectrometer if necessary. 5. Looking ...
All_Stars
... How do pulsars work? The “lighthouse” model attempts to explains why pulsars: • rotate rapidly • have intense magnetic fields • emit beams of radiation that spew from their magnetic poles ...
... How do pulsars work? The “lighthouse” model attempts to explains why pulsars: • rotate rapidly • have intense magnetic fields • emit beams of radiation that spew from their magnetic poles ...
Constellations, Looking Far Away, and Stars/Stellar Evolution
... Read aloud. The graph of how the temperatures and luminosities of stars are related is known as the Hertzsprung-Russell or H-R diagram. From this graph, we can also get an estimate of the size of a star, its radius. Astronomers worked with this graph long before they knew why stars varied in this wa ...
... Read aloud. The graph of how the temperatures and luminosities of stars are related is known as the Hertzsprung-Russell or H-R diagram. From this graph, we can also get an estimate of the size of a star, its radius. Astronomers worked with this graph long before they knew why stars varied in this wa ...
Paper - AMOS Conference
... Studies of retrieved space hardware provide unique information on the meteoroid and debris populations in space. The impact flux information, which can be obtained from exposed surfaces, increases with surface area and exposure time. Returned flight hardware can have much larger exposed surfaces tha ...
... Studies of retrieved space hardware provide unique information on the meteoroid and debris populations in space. The impact flux information, which can be obtained from exposed surfaces, increases with surface area and exposure time. Returned flight hardware can have much larger exposed surfaces tha ...
Here - Astrophysics Research Institute
... α2000 = 1h 42m 20s → 1h 42.33m → 1.706h → 25.583º δ2000 = 51º 34´ 40´´ → 51º 34.67´ → 51.577º Time between 2000 baseline (1 Jan) and date we want to observe = 16.5 years. Therefore, precess 2000 coords forward by this period: α2016.5 = 25.583º + [0.014º . 16.5yrs . (cos23.5º + sin23.5º.sin25.583º.ta ...
... α2000 = 1h 42m 20s → 1h 42.33m → 1.706h → 25.583º δ2000 = 51º 34´ 40´´ → 51º 34.67´ → 51.577º Time between 2000 baseline (1 Jan) and date we want to observe = 16.5 years. Therefore, precess 2000 coords forward by this period: α2016.5 = 25.583º + [0.014º . 16.5yrs . (cos23.5º + sin23.5º.sin25.583º.ta ...
Databases Meet Astronomy a db view of astronomy
... Q17: Find binary stars where at least one of them has the colors of a white dwarf. Q18: Find all objects within 30 arcseconds of one another that have very similar colors: that is where the color ratios u-g, g-r, r-I are less than 0.05m. Q19: Find quasars with a broad absorption line in their spectr ...
... Q17: Find binary stars where at least one of them has the colors of a white dwarf. Q18: Find all objects within 30 arcseconds of one another that have very similar colors: that is where the color ratios u-g, g-r, r-I are less than 0.05m. Q19: Find quasars with a broad absorption line in their spectr ...
User support: lessons learned from HST
... factored in at this point. The PC also reviews the program for things that software can not catch such as inefficient structure or overly restrictive timing requirements. The products from this initial processing are used both for review and to make a long range plan for the telescope. The PC also c ...
... factored in at this point. The PC also reviews the program for things that software can not catch such as inefficient structure or overly restrictive timing requirements. The products from this initial processing are used both for review and to make a long range plan for the telescope. The PC also c ...
Gilmore - Astrometry and Astrophysics in the Gaia sky
... distances to 1% for 18 million stars to 2.5 kpc distances to 10% for 150 million stars to 25 kpc rare stellar types and rapid evolutionary phases in large numbers parallax calibration of all distance indicators e.g. Cepheids and RR Lyrae to LMC/SMC ...
... distances to 1% for 18 million stars to 2.5 kpc distances to 10% for 150 million stars to 25 kpc rare stellar types and rapid evolutionary phases in large numbers parallax calibration of all distance indicators e.g. Cepheids and RR Lyrae to LMC/SMC ...
5a: So, what was wrong with Ptolemy`s model to a contemporary
... Details remained in both models. These result because the actual planetary orbits are elliptical and not circular. Ptolemy dealt with this using uniform motion about the equant point for an eccentric (displaced) deferent circle, and Copernicus dealt with it by introducing a small epicycle for each ...
... Details remained in both models. These result because the actual planetary orbits are elliptical and not circular. Ptolemy dealt with this using uniform motion about the equant point for an eccentric (displaced) deferent circle, and Copernicus dealt with it by introducing a small epicycle for each ...
Planets orbiting stars more massive than the Sun
... However, detecting planets of A-stars with ground-based telescopes is also not easy. Nevertheless, HD15082b is up to now the only known transiting planet of an A-star were the mass has been determined (Lehmann et al. 2014). The noise-level of CoRoT is 80 ppm, 110 ppm, 200 ppm and 280 ppm for a a sin ...
... However, detecting planets of A-stars with ground-based telescopes is also not easy. Nevertheless, HD15082b is up to now the only known transiting planet of an A-star were the mass has been determined (Lehmann et al. 2014). The noise-level of CoRoT is 80 ppm, 110 ppm, 200 ppm and 280 ppm for a a sin ...
2008F-ExtraSolarPlanets-Smith
... varied the mass of the planet to range from 1/300th the mass of Jupiter to ten times the mass of Jupiter. The data shows that fainter stars can be seen with planets of smaller mass. Analyzing this information using the center of mass and Kepler’s Law shows why this is true. As the mass of the planet ...
... varied the mass of the planet to range from 1/300th the mass of Jupiter to ten times the mass of Jupiter. The data shows that fainter stars can be seen with planets of smaller mass. Analyzing this information using the center of mass and Kepler’s Law shows why this is true. As the mass of the planet ...
Document
... “Certain theologians, Galileo’s contemporaries, being heirs of a unitary concept of the world universally accepted until the dawn of the seventeenth century, failed to grasp the profound, non-literal meaning of the Scriptures when they described the physical structure of the created universe. This l ...
... “Certain theologians, Galileo’s contemporaries, being heirs of a unitary concept of the world universally accepted until the dawn of the seventeenth century, failed to grasp the profound, non-literal meaning of the Scriptures when they described the physical structure of the created universe. This l ...
Multiple Choice, continued
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
Observing The Sun
... On August 31st 1991, Yohkoh was launched into space from Kagoshimi Space Center in Southern Japan and was controlled there. Yohkoh sent information back to the base and other control centers, so they could gain more knowledge and understanding about the sun. ...
... On August 31st 1991, Yohkoh was launched into space from Kagoshimi Space Center in Southern Japan and was controlled there. Yohkoh sent information back to the base and other control centers, so they could gain more knowledge and understanding about the sun. ...
The galaxies that host powerful radio sources
... • Optically faint (R>25). • Faint at radio and IR wavelengths. These facts suggest they are distant and dusty. ...
... • Optically faint (R>25). • Faint at radio and IR wavelengths. These facts suggest they are distant and dusty. ...
Circumpolar constellations
... Analyzing those observations, astronomers look for patterns that result from the Earth’s rotation on its axis as well its revolution around the Sun. Observation requires patience, because some celestial motions take long periods of time to repeat. You may not notice the slow, subtle change in the po ...
... Analyzing those observations, astronomers look for patterns that result from the Earth’s rotation on its axis as well its revolution around the Sun. Observation requires patience, because some celestial motions take long periods of time to repeat. You may not notice the slow, subtle change in the po ...
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.